Himalayan subtropical pine forests

A virtually stemless, broadleaf-evergreen native of central and eastern North America: a basal rosette of rigid, sword-shaped, spine-tipped leaves up to 30 inches long, fringed along the margins with the curly white threads that give the species its name. In early summer a flowering stalk shoots from the center to 5 to 8 feet, carrying nodding, bell-shaped, creamy-white flowers. Tough enough for poor sandy soil, heat, drought, and salt spray, it earns its keep as architectural structure in dry and seaside gardens.

A tall, summer-growing cormous perennial from across sub-Saharan Africa, grown for arching spikes of large, hooded, orange-to-red-and-yellow flowers in summer over fans of sword-shaped leaves. This is the widespread wild African gladiolus and a key ancestor of the big garden gladioli. Unlike the winter-growing Cape bulbs, it is a SUMMER-GROWING corm: plant in spring, grow and flower through summer, then it dies back to a dormant corm for winter. It wants full sun, well-drained soil, and summer moisture, and is one of the hardier species gladioli - surviving to about USDA zone 7 with a deep winter mulch or by lifting the corms in cold-winter areas. The corms are toxic and irritant if eaten and have been used in traditional medicine, never as food. In the wild the hooded flowers are pollinated by sunbirds and long-tongued insects.

A bold, clump-forming evergreen perennial from South Africa, grown for big rounded umbels of trumpet-shaped blue (or white) flowers held on tall bare stalks above arching, strap-shaped leaves in mid-to-late summer. It is widely sold as "lily of the Nile," but that is a misnomer - the plant is South African (the Cape provinces and KwaZulu-Natal), not from the Nile. Spectacular and easy in warm climates, this evergreen Agapanthus is frost-tender, so in cold-winter areas it is grown in a container and overwintered under cover. The RHS has given several Agapanthus praecox forms its Award of Garden Merit and rates this evergreen species half-hardy (H3 - needs winter protection).

A tall, bold warm-season annual from Mexico and Guatemala (the "African" name is a misnomer of its European garden history) grown for large, fully double, pompon-like flowerheads in saturated yellow, gold, and orange over strongly aromatic, finely divided foliage. Plants reach 1 to 4 feet and bloom from early summer to frost in full sun. The petals are edible and used as a culinary garnish and natural dye, and the flowers are the iconic "flor de muerto" of Mexican Day of the Dead. Despite the wide listed zone range it is frost-tender and grown for a single warm season.

A native Southeastern North American semi-evergreen woodland groundcover (Pachysandra procumbens), prized for its blue-green to bronze mottled leaves and fragrant white-to-pinkish bottlebrush flower spikes that open at ground level in late winter to early spring. Unlike the widely planted invasive Asian Pachysandra terminalis, this native spreads slowly by rhizomes into well-behaved clumping colonies, making it a low, restrained groundcover for shaded native plantings.

Hippeastrum x hybridum is a complex garden hybrid derived from six or more wild Hippeastrum species native to tropical and subtropical South America, developed through intensive breeding since the late 18th century and now the dominant "amaryllis" sold worldwide as a holiday bulb. It produces spectacular trumpet-shaped flowers - 5 to 8 inches across - on stout leafless scapes in red, pink, white, orange, salmon, or bicolour, making it one of the most dramatic winter-flowering houseplants available. The honest catch is toxicity: the entire plant, especially the bulb, contains lycorine and related alkaloids at concentrations that cause vomiting, salivation, tremors, and hypotension in pets and children, so it must be placed out of reach and handled with care.

American beautyberry (Callicarpa americana) is a loose, open, arching deciduous shrub of the southeastern and south-central United States, grown almost entirely for one spectacular autumn trick. Through summer it is a quiet green background plant, carrying small clusters of pink-to-lilac flowers tucked into the leaf axils. Then, from late summer into fall, those clusters ripen into tight whorls of vivid magenta-purple berries that wrap right around the stems at every leaf joint, so the arching branches look strung with beads. Songbirds strip them through fall and early winter. It is an easy, fast-growing, forgiving native that asks for little: full sun to part shade, ordinary well-drained soil, and room to arch. Site it where the fall berry show can be seen, because in leaf and flower it is plain, and in fruit it is one of the most distinctive shrubs you can grow.

A fast, suckering native shrub of streambanks and moist thickets across eastern North America, grown for huge flat-topped cymes of tiny lemon-scented white flowers in early summer and the clusters of dark elderberry drupes that follow. Spreads by root suckers into naturalized colonies 5 to 12 feet tall and wide; the flowers feed butterflies and the showy fruit feeds birds. The raw berries are not eaten fresh - they are cooked into jelly, pie, and wine.

The American elm is the great vase-shaped shade tree that once arched over Main Streets and town commons across eastern North America - a fast, extremely cold-hardy deciduous tree of 60 to 80 feet whose upright trunk divides into a fountain of high, spreading limbs that meet overhead to form a living cathedral ceiling. That iconic form, and the species' tolerance of wet soil and tough urban conditions, made it the default American street tree for a century. Then Dutch elm disease (DED) - an introduced fungal disease carried by elm bark beetles - swept through in the 20th century and killed the vast majority of mature street and shade elms across the continent. The honest reality for a gardener today is blunt: do not plant the unselected wild species expecting it to survive. If you want the American-elm form, plant a DED-tolerant cultivar bred and selected for resistance - 'Princeton', 'Valley Forge', 'New Harmony', or 'Jefferson' - and say so plainly. Where it does grow, it is fast, hardy to USDA zone 3, and remarkably forgiving of wet ground and city stress.

American germander, also called wood sage, is a widespread North American native perennial in the mint family that runs steadily underground on creeping rhizomes. From early to midsummer it sends up erect, softly hairy stems topped with one-sided spikes of pale pink-to-lavender flowers, each with the distinctive deeply lobed lower lip that gives the germanders their look and makes a generous landing platform for bees. It is a plant of moist open ground - wet meadows, streambanks, ditches, and the edges of thickets - across most of the contiguous United States into southern Canada, which tells you exactly what it wants: sun and a soil that does not dry out. The honest caveat is its vigor: those same rhizomes that fill a bank or a rain garden so readily will also colonize a tidy perennial border and crowd politer neighbors. Site it where it can run, or give it a root barrier, and it rewards you with a long, dependable bee-friendly bloom rather than a maintenance fight.

A rounded, multi-stemmed deciduous shrub native across eastern and central North America, grown for its edible nuts and its season-opening catkins. Showy 2-3 inch yellowish-brown male catkins dangle from bare branches in early spring before the ovate, double-toothed leaves emerge; small egg-shaped edible nuts ripen inside leafy husks by mid- to late summer. Easygoing in average soil and tolerant of clay and black walnut, it suckers into thickets that screen and shelter wildlife.

The only native U.S. holly with both spiny green leaves and bright red berries - an upright, pyramidal, broadleaf evergreen tree that slowly matures to 15 to 30 feet in cultivation (to 50 feet in the wild). Thick, leathery, deep green leaves bear spiny marginal teeth, and pollinated female trees carry showy red-to-orange drupes that ripen in fall and persist through winter as bird food. This is the classic "Christmas holly" of wreaths and decorations.

A small-to-medium understory tree of dry, rocky eastern-North-American woods, named for its drooping clusters of papery, sac-like seed pods that resemble the fruit of hops. The birch-like, sharply-serrated leaves turn an undistinguished yellow in fall, and reddish-brown male catkins persist on the bare branches through winter. Also called ironwood for its extremely hard, dense wood; tough, low-maintenance, and drought-tolerant once established.

A tough, medium-sized native tree of the eastern and midwestern United States, grown as much for its showy edible orange fruit as for its distinctive thick, dark gray bark broken into rectangular blocks. Small urn-shaped white-to-greenish-yellow flowers open in May and June, and the sweet fruit ripens after frost. Largely dioecious - a female tree needs a male pollinizer nearby to set fruit - and notably drought- and walnut-tolerant once established.

A native canopy tree of eastern North American forests with iconic star-shaped 5-lobed leaves displaying outstanding red-purple-orange fall color, distinctive corky wing-bark on twigs, and spiky round seed pods that famously litter lawns ("gumballs"). The seed pods are the design-defining drawback - Liquidambar is rarely planted in formal landscapes for this reason. Choose seedless cultivars ('Rotundiloba', 'Slender Silhouette') for residential planting.

A massive native deciduous canopy tree of eastern North American floodplain forests producing distinctive mottled white-tan-gray exfoliating bark (the design-defining trait - sycamore bark looks like military camouflage), large palmate maple-like leaves, and persistent spherical seed balls. Among the largest deciduous trees in eastern North America - old-growth specimens exceed 150 feet tall + 10 feet trunk diameter. Site only where massive scale is acceptable.

Dierama pulcherrimum, angel's fishing rod, is an arching, more-or-less evergreen cormous perennial in the iris family (Iridaceae), endemic to the open summer-rainfall grasslands of the Eastern Cape of South Africa. It forms grassy tufts of long, narrow leaves from which tall, wiry, arching flower stems rise to about 4.9 feet (occasionally to 5.9 feet), each hung with pendulous, bell-shaped rosy-pink to purple flowers in summer - the namesake "fishing rod" silhouette over a pond or in a gravel garden. It is the load-bearing caution to note that this is only a borderline-hardy plant: RHS rates it H4 (hardy to roughly 14 to 23°F / USDA ~8b-9), so in colder zones it needs a sheltered, sunny, sharply drained spot, a winter mulch, or container/glasshouse protection, and it resents disturbance once established. It is not recorded as toxic - though it is grown purely as an ornamental and is not a food plant, so treat it as inedible. It is well-behaved (Least Concern in the wild, no recorded weediness) and suits borders, pond margins, and containers in mild-temperate gardens.

A native eastern-US deciduous shrub - 'Annabelle' is a sterile-flowered cultivar of smooth hydrangea - with very large white snowball blooms in summer. Blooms on new wood so spring frost cannot destroy the flower display, and serves as the larval host for the hydrangea sphinx moth.

Armand clematis is a vigorous evergreen climbing shrub native to much of China (except the north and extreme south) and northern Myanmar, grown for its profusion of almond-scented, star-shaped white flowers in early spring (March-April) on the previous season's wood. It excels as a structure-covering climber on sheltered walls, pergolas, and fences, providing year-round glossy, deep-green foliage. The honest catch is its rampant vigor: in a favored site it can overwhelm host structures within a few years, sheds masses of dead leaves through the year (a persistent litter problem), and all parts are toxic to cats, dogs, and horses (and the sap irritates skin) - and it is only reliably hardy to about USDA zone 7b with the shelter of a warm wall, making it a borderline plant anywhere colder.

A fast cool-season annual of the mustard family grown for its peppery, mustard-like salad greens - irregular, pinnately-lobed basal leaves in a low rosette, each with 4 to 10 small lateral lobes and a large terminal lobe (Missouri Botanical Garden). First cultivated by the ancient Greeks and Romans and still widely grown across Europe, it is best grown in the cooler spring and fall months rather than summer heat; leaves are harvested young and tender before they turn strong and bitter. Pale-yellow four-petalled flowers with dark brown or purple veins appear in corymbs if plants are left to bloom.

A deciduous Eastern-Asian fruit tree with a rounded, spreading crown that the Missouri Botanical Garden lists at 20 to 30 feet tall and wide. Oval leaves emerge yellowish-green, mature to glossy green, and turn gold to red in fall; fragrant but insignificant late-spring flowers give way to showy orange persimmons (3 to 4 inches) that ripen in late fall and may persist on bare branches into winter. Winter hardy to USDA Zones 7-10 and drought tolerant once established.

A long-lived herbaceous perennial vegetable grown for the tender young spears harvested in April and May before they unfurl. Native to Europe and temperate Asia, it grows from a crown that takes 2-3 years to come into production but then yields for fifteen years or more. Spears left uncut grow into airy 3-4 foot summer ferns; the plants are dioecious, and female plants ripen ornamental red berries in late summer.

Atlas cedar is a large, long-lived evergreen conifer native to the Rif and Atlas Mountains of Morocco and the Tell Atlas of Algeria, where it forms forests at 3,839 to 7,218 feet elevation (Wikipedia). In cultivation it develops a stately, broadly conical to flat-topped crown with silver-blue to grey-green needles, reaching 98 to 115 feet tall - a genuinely majestic specimen tree for large gardens and parkland. The honest catch is scale: this is not a suburban garden tree. It grows too large for most plots, casts dense, permanent shade beneath its canopy, and drops barrel-shaped cones that can be heavy and messy. Surface roots lift paving and outcompete underplanting once the tree matures.

Aubrieta (Aubrieta deltoidea) is a low, mat-forming evergreen perennial in the mustard family (Brassicaceae), native to the rocky hillsides of southeastern Europe - primarily Greece, the Aegean Islands, Crete, and adjacent Mediterranean coasts. It is one of the most reliable spring-flowering ground covers for sunny, well-drained spots: cascading sheets of violet to deep pink four-petalled blooms from March through May, attractive to bees and bee flies. The honest catch is that without a hard cut-back immediately after flowering, plants become woody and bare in the centre within two or three years, collapsing from a tight carpet into a tired, gappy mat.

A native eastern + central North American thicket-forming shrub producing arching thorny canes + clusters of large sweet black berries in mid-to-late summer. Among the most important wildlife fruit producers in eastern forests - birds, mammals, + insects all depend on the fruit. Like raspberry, biennial-caned (primocane year 1, fruits in year 2 as floricane, then dies back). Spreads via root suckers + tip-rooting cane tips; manage with annual pruning.

A medium-to-large native shade tree of central and eastern North America, reaching 50 to 80 feet with an ovate-rounded crown and large, asymmetric heart-shaped leaves. In June it carries pale-yellow, intensely fragrant flowers on pendulous cymes - each cluster hung from a distinctive strap-like leafy bract - that ripen into pea-sized nutlets. The fragrant June bloom is a premier nectar source: Missouri Botanical Garden lists it as attracting bees and butterflies, and the Lady Bird Johnson Wildflower Center flags it as having special value to both native and honey bees.

Once the dominant canopy hardwood of the eastern United States forest - an estimated four billion trees, prized for fast growth, rot-resistant timber, and an enormous annual crop of sweet edible nuts that fed people, livestock, and wildlife alike. In the early 1900s an introduced Asian fungus, chestnut blight (Cryphonectria parasitica), swept through and functionally destroyed it: by the 1950s the species was effectively extinct as a mature forest tree. Surviving root systems still send up sprouts from old stumps, but the blight almost always girdles and kills them before they can grow large enough to flower and reproduce. The honest reality for a gardener is that you cannot reliably grow a mature wild-type American chestnut today. The realistic paths are blight-resistant backcross hybrids from The American Chestnut Foundation or transgenic blight-tolerant lines still being deployed - not a pure wild seedling, which the blight will almost certainly kill.

A small native deciduous tree (or thicket-forming, suckering shrub) of eastern and central North America, grown for clouds of fragrant white 5-petaled flowers that open in March before the leaves and for the edible red plums that follow in early summer. It forms a broad, spreading crown with attractive dark reddish-brown twigs that sometimes carry thorny lateral branchlets. A documented larval host for swallowtails and other butterflies, with flowers of special value to native, bumble, and honey bees.

A native bramble (cane) producing red aromatic edible fruit in summer or fall (depending on summer-bearing vs everbearing cultivar). Self-pollinating; spreads vigorously by root suckers + tip-rooting canes. NC State documents extensive Lepidoptera + small mammal + bird wildlife value alongside the edible fruit role. Site where the spreading habit is welcome - naturalized colonies form in sun-exposed open ground.

Amur maple (Acer ginnala, accepted by Kew's Plants of the World Online as Acer tataricum subsp. ginnala) is a small, fast-growing deciduous tree or large multi-stemmed shrub from northeastern Asia - the Russian Far East, northeastern China, and Korea. At 15 to 20 feet it fits where a full-size maple cannot, and it earns that place with three seasons of interest: fragrant greenish-yellow flowers in spring, which is an unusual scent for a maple and an early nectar source for bees; small glossy three-lobed leaves through summer; and reliable, often brilliant red-to-orange fall color that arrives early. It is also one of the hardiest maples, tolerant of cold, wind, dry soil, and a wide range of pH. The honest catch, and it is a serious one for North American gardeners, is that it self-sows prolifically and has escaped cultivation to become invasive across parts of the US Midwest and Northeast, where its shade-tolerant seedlings crowd native shrubs and understory trees in open woods, savannas, and prairies. Several states list it as invasive or a noxious weed. Check your local invasive-species list before planting, and be prepared to remove seedlings if you do.

An upright, clump-forming perennial of the mint family native to the upper Midwest, Great Plains, and into central Canada, named for its anise-scented foliage. From June through September it carries dense terminal spikes of lavender-to-purple two-lipped flowers above square stems and opposite, toothed leaves. The Lady Bird Johnson Wildflower Center flags it as a nectar source with special value to native bees, bumble bees, and honey bees, and it also draws butterflies and hummingbirds.

The domesticated orchard apple - a deciduous Rosaceae tree grown for its showy, edible fruit and fragrant April blossom of five white-to-pink petals around a ring of yellow stamens. Not native to North America (the genus Malus spans Europe, Asia, and North America, but the cultivated apple is an Old World hybrid lineage). Almost all varieties are self-incompatible: a second, different apple cultivar blooming at the same time must be nearby for fruit to set, and trees are grown on dwarf, semi-dwarf, or standard rootstocks that decide final size.

A small deciduous Rosaceae fruit tree grown for its golden-orange, red-blushed drupes - fragrant, showy, edible, and ripening in summer. Fragrant white flowers (pink in bud) open in early spring before the foliage, two weeks ahead of peaches. That early bloom is also its weakness: the flowers are extremely susceptible to frost injury, so apricots are notoriously hard to crop reliably outside sheltered sites.

Arkansas blue star (Amsonia hubrichtii), also called threadleaf bluestar or Hubricht's bluestar, is a clump-forming native perennial from a tiny wild range in the Ouachita Mountains of Arkansas and Oklahoma that has become one of the most dependable foliage perennials in temperate gardens. It builds a soft, rounded, knee-to-waist-high mound of upright stems clothed in very fine, needle-like, thread-thin leaves, so the whole plant reads as a feathery green cloud through summer. In late spring the stem tips carry loose clusters of small, pale powder-blue, five-pointed star flowers, a quiet but pretty show that draws butterflies and other pollinators. Its headline act comes in autumn, when the fine foliage turns a clear golden-amber that lights up the border and earned it the Perennial Plant Association Plant of the Year for 2011. It wants full sun to part shade and is famously tough, adaptable, and deer-resistant, though it will flop open in too much shade or overly rich soil, so give it sun and a light shearing after bloom if you want it to stay upright.

A native central + eastern US perennial with intensely aromatic foliage when crushed and dense clouds of small blue-purple flowers in late fall - often the latest-blooming aster in the eastern flora. Drought + clay tolerant; among the toughest native fall pollinator plants.

A native eastern + central North American multi-stemmed deciduous shrub with dentate (toothed) foliage, white spring flower clusters, blue-black drupes, and reliable fall color. Especially valued for wildlife - among the most-cited native shrubs for fall-migration bird forage.

Asiatic hybrids are the easiest lilies to grow and among the first to bloom - rigid, unbranched 3-4 foot stems carry large, mostly upward- and outward-facing flowers 4 to 6 inches wide in nearly every color but blue, often with dark basal spotting. The flowers are showy and good for cutting but, unlike most other lily groups, usually have little or no fragrance. Every part of the plant is dangerously toxic to cats.

Epimedium grandiflorum (large-flowered barrenwort, bishop's hat) is a deciduous woodland perennial native to Japan and Korea, valued for its delicate long-spurred spring flowers in pink, white, purple, or yellow and its copper-flushed heart-shaped foliage. It thrives in dappled shade under trees and shrubs, tolerates dry shade once established, and is rarely browsed by deer or rabbits. The honest catch is patience: it is genuinely slow to establish, spreading only modestly from its shallow rhizomes, and the early spring flowers are vulnerable to late frost damage - gardeners expecting quick ground cover are regularly disappointed in the first two to three seasons.

A large, vigorous, fountain-shaped deciduous shrub that earns its common name in late spring, when its arching stems are smothered in masses of pale-pink, yellow-throated, bell-shaped flowers. Native to China, it is one of the great old-fashioned spring shrubs - spectacular in full bloom, much loved by bees, and offering peeling brown bark for quiet winter interest. It is also genuinely big: expect 6 to 10 feet tall and wide at maturity, so give it room rather than fighting its size with the shears. The form to seek out is the Award-winning "Pink Cloud", which carries a clearer, richer pink than the variable seed-grown species.

A vigorous, semi-evergreen, clump- and colony-forming hardy geranium grown as one of the best groundcovers for dry shade under trees and shrubs. Its soft, deeply lobed, strongly aromatic leaves form a dense, weed-smothering carpet, many of them flushing red and bronze in autumn, and above the foliage rise loose clusters of magenta-pink (or white) flowers with prominent protruding stamens in late spring and early summer. It spreads steadily by thick surface rhizomes into a tough, low-maintenance, weed-proof mat that is easy to pull back and is not aggressively invasive. The aromatic foliage makes it markedly deer- and rabbit-resistant, and it is genuinely drought-tolerant once established. It is grown purely as an ornamental and is not a food plant.

A drought-and-flood-tolerant native shrub of eastern North America with brilliant three-season interest - spring white-pink flowers, glossy black antioxidant-rich late-summer berries, and brilliant wine-red fall foliage - plus an extraordinarily wide cold-hardiness range (USDA 3a-8b). The berries are astringent fresh but the basis of a small but growing commercial industry (juices, wines, jams, supplements) for their exceptionally high anthocyanin content. Spreads by suckers; site where colony formation is welcome.

Black cohosh (Actaea racemosa, long known as Cimicifuga racemosa) is a tall woodland perennial of eastern North American forests, grown for its dark, deeply divided foliage and its dramatic summer flower spikes. From a low mound of near-black-green, astilbe-like leaves about 2 to 3 feet high, slender stems shoot up to 4 to 8 feet and open wand-like white bottlebrush racemes of fluffy, petalless, stamen-packed flowers that light up shade when little else is blooming. It wants what a forest floor gives it: shade or morning-only sun, and deep, rich, steadily moist soil. The flowers carry a strong, sweet-but-fetid smell up close that draws flies, gnats, and small beetles, which is the root of the old name bugbane. It also has a long history in herbal medicine for womens health, but that is medicinal use with real cautions, not a garden edible.

Black elder (Sambucus nigra) is a fast, tough, wildlife-rich deciduous shrub native across Europe, north Africa and western Asia (POWO). It earns its place twice a year: broad flat creamy-white flower umbels scent the garden in early summer, then drooping clusters of small black berries ripen in late summer to feed birds in quantity. RHS gives the ornamental forms (e.g. "Black Lace") the Award of Garden Merit and rates the species fully hardy (H6). It is also one of the classic foraging shrubs - the flowers and the COOKED ripe berries are much-used for elderflower cordial and for elderberry syrup, wine and jam. The honest catch is real: the raw berries, and the leaves, bark, stems and roots, are toxic (cyanogenic glycosides) and cause nausea and vomiting, so berries must always be cooked and never eaten raw or unripe. Vigorous to the point of suckering and seeding about, elder is a wildlife and hedgerow plant first, an ornamental second.

The original black-eyed Susan - a bristly-stemmed, short-lived meadow daisy that behaves as an annual, biennial, or brief perennial depending on where it grows. It blooms hard and early from seed, then carries itself forward by reseeding rather than by spreading into a permanent clump.

Blackthorn is a dense, fiercely spiny deciduous shrub native across Europe, western Asia, and locally in northwest Africa, famous for its clouds of white blossom in early spring and its bitter sloe berries used to make sloe gin. In garden settings it is valued as an impenetrable wildlife hedge and early pollinator plant, but the honest catch is its aggressive root-suckering: given space it spreads into spreading thickets that are almost impossible to eradicate, and its long, needle-sharp thorns cause "blackthorn disease" - septic puncture wounds that can require medical attention - making it a plant to site with eyes open rather than as a casual garden shrub.

A native eastern North American spring ephemeral wildflower with pristine white 8-12-petaled flowers in early spring (often the first major forest-floor wildflower of the year) wrapped by a single rounded glaucous leaf. Disappears by midsummer to underground rhizomes. The red rhizome sap was historically used by Indigenous peoples as a dye and ceremonial paint.

Blue fescue (Festuca glauca) is a small, neat, evergreen ornamental grass native to Europe, grown almost entirely for its striking foliage: it forms a tidy, rounded, hedgehog-like tuft of fine, needle-thin, intensely steel-blue leaves. In early summer slim, wheat-coloured flower spikes rise just above the dome and fade to buff. Compact and orderly, it reads as a cool blue mound that holds its shape and colour through the seasons. Honesty matters with this grass: the famous blue is at its brightest only in full sun and lean, sharply drained soil - in rich, wet, or shaded ground it sulks, greens out, and rots. It is also short-lived, tending to die out in the centre after three or four years, so it must be lifted and divided regularly to keep fresh blue tufts coming. Like most exotic ornamental grasses it offers little to wildlife compared with native bunchgrasses. The trade's best-known form is the cultivar 'Elijah Blue', which holds the RHS Award of Garden Merit.

A native vervain of eastern and central North American wet meadows, stream banks, and rain gardens - a rough, clump-forming perennial with stiff, square hairy stems that branch above into candelabra-like spires. Slender, pencil-like spikes carry tiny purplish-blue tubular flowers that open a few at a time from the bottom up over a long July-to-September bloom. Attracts hummingbirds and butterflies and carries Special Value to Native Bees.

A low, ground-hugging warm-season annual legume domesticated in West Africa (around present-day Mali and Nigeria) and grown across the continent as a hardy indigenous pulse (GBIF). Trifoliate leaves rise on short, creeping stems, and after the tiny flowers are pollinated their stalks bend down and push the developing pods into the soil, so the crop ripens UNDERGROUND like a peanut. The round, hard seeds are remarkably rich in both protein and carbohydrate, making bambara groundnut a near-complete food and a staple where harsher conditions defeat other beans. It is famously DROUGHT-tolerant and productive on hot, poor, sandy soils, fixing its own nitrogen, but it is a FROST-TENDER, warm-season annual that needs a long, warm season for the underground pods to fill. RHS lists it as a tender, drought-tolerant warm-season annual pulse for full sun, its pods ripening underground (RHS). Outside the tropics it is grown as a summer annual, sown after the last frost once the soil is warm.

Gerbera jamesonii, the Barberton daisy (also Transvaal daisy), is a tufted evergreen perennial herb in the daisy family (Asteraceae) native to the summer-rainfall grasslands and rocky woodland of north-eastern South Africa and Eswatini. It forms a basal rosette of lobed leaves from which leafless flowering scapes rise, each topped by a single large daisy-style flowerhead in orange-red, yellow, pink, or white. It is the wild ancestor of the thousands of florist gerbera cultivars and earns its place as a long-blooming focal point in borders and patio containers, attractive to bees and other insects. The load-bearing caution is frost-tenderness: RHS rates it H1C, meaning it survives outdoors only in summer or the very mildest, frost-free spots and must be overwintered under glass elsewhere (roughly USDA 9-11). It is non-toxic, with no reported poisoning hazard to people or pets, making it a safe choice where toxicity is a concern.

Protea neriifolia, the bearded protea, is a tall, robust evergreen fynbos shrub from the Cape Floristic Region of South Africa, grown for its large goblet-shaped flower heads of soft pink-to-cream bracts - each one rimmed with a distinctive 'beard' of black or white fur at the bract tips. Narrow, oleander-like leaves clothe the stems, and the long-lasting blooms are a staple of the cut-flower trade. It is one of the easiest, longest-flowering, and most widely grown proteas, but it is FROST-TENDER (RHS H3, hardy to only about 25°F briefly) and belongs in a warm-temperate or Mediterranean climate, USDA zones 9a-11, or under glass. Like all of its family it is PHOSPHORUS-SENSITIVE: ordinary phosphate fertiliser or bone meal will kill it, and it demands acidic, sharply-drained soil, full sun, and good air circulation. In its homeland the nectar-rich heads are bird-pollinated by sunbirds and sugarbirds.

Felicia amelloides is an evergreen, woody-based perennial subshrub native to a narrow coastal strip of South Africa's Western and Eastern Cape, where it colonises stabilising sand dunes, sandy flats, and rocky outcrops at 0 to 3,280.8 feet. In the garden it delivers a near-continuous flush of sky-blue, yellow-centred daisy flowers on neat mounding growth, typically 12 to 24 inches but capable of reaching about 3.3 feet, making it one of the few true blue-flowered plants for sunny pots and borders. The honest catch is frost-tenderness: it survives only light frost in sharply drained soil and collapses below about 23°F, so outside USDA zones 9-11 it must be overwintered under glass or replaced annually - a real commitment in cool-temperate gardens.

A slender, soft, ferny-leaved evergreen fynbos shrub from the Cape Floristic Region of South Africa, treasured for its nodding flower heads ringed with delicate, papery bracts flushed white-to-pink - the traditional Cape "blushing bride" wedding flower. HONESTY (load-bearing): Serruria florida carries a conservation story. It is very rare in the wild, native to only a tiny area of the Cape Provinces (the Franschhoek mountains) and long thought nearly extinct, and it survives largely through cultivation per POWO (Kew). It is also the most demanding member of the protea family in this group and is short-lived, often lasting only 3-5 years. Like all Proteaceae it has cluster (proteoid) roots adapted to nutrient-poor fynbos soils, so it is PHOSPHORUS-SENSITIVE: ordinary phosphate fertiliser or BONE MEAL will KILL it. It needs acidic, extremely sharply drained, sandy soil, full sun, and excellent air movement, and is best grown in a pot or a perfectly drained Mediterranean bed. RHS rates it tender (H3): it is FROST-TENDER and is drought-tolerant once established but resents wet feet. It is grown ornamentally and as a cut flower; it is not edible. Bird and insect visitors work the heads, and in cultivation honey bees forage the nectar.

Cape aloe (Aloe ferox) is a bold, single-stemmed tree-aloe and the source of the bitter aloe of commerce. GBIF gives its native range as the Eastern and Western Cape of South Africa and into Lesotho, part of the Cape Floristic and Karoo succulent flora. It builds a thick trunk clothed in a skirt of old dried leaves, topped with a big rosette of thick, blue-green, red-toothed, spiny leaves, and in winter sends up tall candelabra spikes of orange-red (sometimes yellow) flowers that are a superb cold-season nectar source - in the wild they are pollinated by sunbirds. It is an architectural, extremely drought-tolerant succulent for full sun and very sharp drainage: the number-one way to kill it is overwatering, because wet, cold soil rots the roots and crown faster than drought ever will, so water sparingly and never let it sit wet. It is frost-tender - RHS rates it H3, hardy only to a light frost - so outside warm, dry climates it is best grown large in a pot and moved under cover for winter. The bitter yellow leaf latex (the source of the laxative drug "Cape aloes") is a strong purgative and is toxic if eaten, so the plant is not food. Hardy outdoors in roughly USDA zones 9a-11; everywhere colder it lives under cover.

A small, choice, winter-growing Cape bulb (Lachenalia aloides) that throws up a pair of fleshy, often maroon-spotted strap leaves and a slender stem of pendent, tubular flowers shading from yellow through orange and green to red - a living jewel for a pot or a frost-free rockery. Native to the Cape Provinces of South Africa - the winter-rainfall Western Cape of the Cape Floristic Region (POWO, Kew) - it follows the rhythm of that Mediterranean climate: it is winter-growing and summer-dormant, the opposite of most bulbs, so it is watered from autumn through spring while it is in leaf and flower and then kept dry and at rest through summer. It is frost-tender (RHS H2): outside warm, frost-free climates grow it in a pot in a cool greenhouse or a bright, frost-free room, or in a sheltered, sharply drained spot. In its native fynbos the nodding tubular flowers are pollinated by sunbirds, with bees also visiting. The bulbs are toxic if eaten - it is grown strictly as an ornamental.

A vigorous, scrambling, semi-climbing tender shrub that flowers almost without pause through the warm months, carrying broad clusters of soft sky-blue (or, in the white form, pure white) phlox-like flowers. Known as the Cape plumbago or Cape leadwort, it is native to South Africa (POWO, Kew) and is grown worldwide as an easy, long-flowering ornamental. The honest catch is its frost-tenderness: it is hardy only in USDA zones 9a-11, so in cold climates it is grown as a conservatory or large-container plant, or treated as a summer annual. Left to its own devices it climbs or sprawls 6 to 10 feet and needs support, or hard pruning, to keep its shape; the flower calyces are sticky and glandular and cling to clothing and animal fur (its own seed-dispersal trick), and it suckers. In return it is one of the best blue-flowered butterfly plants for a warm garden.

A tender tropical evergreen shrub grown for its enormous, flamboyant flowers - broad funnels of red, pink, orange, yellow, or white, single or double, each with a long protruding column of fused stamens. Native to tropical Asia (a cultigen of such ancient cultivation that no certain wild origin survives), Hibiscus rosa-sinensis blooms continuously in warmth above glossy, dark green, evergreen leaves. Each flower typically lasts only a day, but a healthy plant opens fresh blooms in steady succession from spring through fall - and year-round in frost-free climates. It is the classic hibiscus of warm-climate landscapes and patio containers: heat- and humidity-loving, frost-tender, and hardy in the ground only in USDA zones 9a-11b.

A warm-season annual legume domesticated in sub-Saharan Africa (GBIF) and now grown throughout the warm world, cowpea is the black-eyed pea, southern pea, and cowpea of countless kitchens - a protein-rich African staple grown for both its young leaves and its seeds. The bushy or twining plants carry trifoliate leaves, pale lilac-to-white pea flowers, and long slender pods packed with seeds (often the familiar pale seed with a black eye). HONEST CLIMATE NOTE: this is a FROST-TENDER, warm-season ANNUAL for full sun. It is notably drought-tolerant and thrives in heat and poor soil, fixing its own nitrogen from the air, so it does not want rich nitrogen feeding - too much nitrogen gives you leaves instead of pods. Sow it after the last frost once the soil is warm and let it run through a long, hot summer; outside the tropics it is grown purely as a summer annual. The dried seeds are cooked like any bean and the young leaves are eaten as a cooked green. It is bee-pollinated but largely self-pollinating, so a single plant still sets a crop.

A showy, tender, clump-forming fountain grass grown for its long, soft, nodding, foxtail plumes in pink to purple that arch above mounding foliage all summer and fall - most striking in the burgundy-leaved forms ('Rubrum', 'Fireworks') that anchor summer containers and bedding. Its accepted botanical name is now Cenchrus setaceus, though gardeners still know it as Pennisetum setaceum. HONESTY: the green-leaved species is one of the world's most serious invasive grasses - a fire-promoting noxious weed that has overrun wild land in California, Hawaii, Arizona, and beyond, and is banned or restricted in several places - so grow ONLY the sterile burgundy cultivars, never the seeding green species. Frost-tender (zone 9 and up), it is grown as a summer annual in cold climates.

A warm-season member of the nightshade family (Solanaceae) - a relative of tomato, potato, and pepper - grown for its showy, glossy edible berries that range from white and green through deep purple to nearly black depending on cultivar. The plant is technically a tender herbaceous perennial but is grown as an annual vegetable across most of North America, where it demands a long, hot, frost-free season to fruit well. Drooping violet star-shaped flowers give way to the familiar pendant fruit; the leaves, flowers, stems, and roots are toxic and only the fruit is eaten.

A compact, warm-season annual cereal grass - finger millet, also known as ragi - grown for its tiny, exceptionally nutritious reddish grain. Its seed heads split into a cluster of incurved, finger-like spikes (the source of the name), and it is a hardy, storable staple of the East African highlands and South India. Honest reality: it is a frost-tender, warm-season annual for full sun, sown after the last frost once the soil is warm. It copes well with drought and poor soils and tolerates a wider range of altitude and rainfall than the other millets, and its gluten-free grain is rich in calcium and iron and stores for years - eaten as flour, porridge, and in brewing. Outside the tropics it is grown as a summer annual.

The true culinary ginger - a tropical-Asian herbaceous perennial grown for its aromatic, pungent, branched rhizome rather than its rarely-seen bloom. Reed-like pseudostems carry two-ranked lanceolate leaves to 2 to 4 feet, rising from a fleshy underground rhizome that is the kitchen and apothecary spice. Hardy outdoors only in USDA zones 9-12; in cooler regions it is grown as a warm-season annual or container plant and started from a fresh grocery-store rhizome each spring.

A broadleaf-evergreen citrus tree reaching 15 to 30 feet tall and wide, with glossy foliage, sharp thorns on its twigs, and highly fragrant white four-petaled flowers. The large fruit (over 3 inches across) ripens pale yellow, often patched with pink, over juicy flesh that ranges from near-white to deep red by cultivar. A subtropical tree hardy only to USDA zone 9a, it is grown outdoors across the citrus belt and as an overwintered container plant farther north.

Sparaxis tricolor is a corm-forming perennial in the iris family (Iridaceae), native to the northern Bokkeveld Escarpment in the west-central Cape Provinces of South Africa, where it grows in renosterveld on damp clay and stony soils. Its vivid orange-scarlet flowers with golden-yellow centres ringed by reddish-black make it one of the most eye-catching spring bulbs available, and it naturalizes freely in mild-winter climates. The honest catch is a double one: corms are frost-tender (reliably perennial only in USDA zones 9–11; RHS H2, killed by freezing - treated as an annual or lifted/stored elsewhere), and the plant has escaped garden cultivation in California and parts of Australia, where it is documented as an introduced weed - gardeners in Mediterranean climates should deadhead scrupulously and avoid planting near wild land.

A vigorous, shade-intolerant small evergreen tree (or large shrub) native to tropical southeastern Asia, grown for very juicy, aromatic green-to-yellow fruit with a thinner rind than Persian lime. Glossy, leathery, distinctively aromatic leaves frame showy five-petaled white flowers - purple-tinged when new - that can appear across all four seasons in warm climates. Strictly tender: NC State lists it for USDA zones 9a-11b, and it does not tolerate standing water, flooding, or shade.

A sculptural evergreen fynbos shrub bearing the largest flower head of any protea - a great goblet of pointed pink bracts wrapped around a dense central boss - and the national flower of South Africa. Leathery, rounded leaves clothe a woody, fire-adapted rootstock. It is native to the Cape Provinces of South Africa, the Cape Floristic Region / fynbos (POWO, Kew), and is FROST-TENDER: RHS rates it tender (H3), hardy only to about 25°F briefly, so outside warm-temperate / Mediterranean climates it is grown under glass or in a sheltered, sharply-drained spot. Like all Proteaceae it is PHOSPHORUS-SENSITIVE - it evolved on nutrient-poor fynbos soils with cluster (proteoid) roots, and ordinary phosphate fertiliser or BONE MEAL will kill it. In the wild the nectar-rich heads are bird-pollinated, worked by sunbirds and sugarbirds. Grown ornamentally and as a premier cut flower; it is not a food plant.

The leading acid citrus - a small broadleaf-evergreen tree to 10 to 20 feet, usually armed with sharp thorns on the twigs, bearing fragrant white flowers (purplish beneath) that ripen into the familiar oval, nipple-tipped yellow fruit dotted with aromatic oil glands. A tender subtropical: hardy outdoors only in USDA zones 9-11, but a classic large-container plant that can summer outside and overwinter indoors in colder climates. Native to Asia, not North America.

Citrus reticulata is the mandarin orange, a small evergreen citrus tree originating from wild populations in South China and Vietnam (the Nanling Mountains region), where domestication occurred at least twice from distinct wild subspecies. In warm climates (USDA zones 9-11) it is a productive, fragrant garden tree bearing the familiar loose-skinned sweet fruits prized worldwide. The honest catch is frost-tenderness: even a light freeze damages the tree and kills young growth, so outside the deep South, coastal California, and Mediterranean climates, it can only be grown as a container plant brought indoors each winter -- a significant maintenance commitment that most gardeners underestimate.

Kalanchoe tomentosa is a slow-growing, evergreen succulent subshrub endemic to the rocky granite outcrops of east-central Madagascar, where it tolerates seasonal drought in arid and semi-arid scrubland. In gardens it excels as a tactile, silver-felted container or houseplant prized entirely for its velvety, brown-tipped foliage; it rarely flowers in cultivation. The honest catch is toxicity: the plant is toxic to cats and dogs and mildly toxic to humans, so it must be kept out of reach of pets and children - making it a poor choice for households with either.

A tall, warm-season annual cereal grass grown for its nutritious grain - pearl millet, the staple of the driest farmed lands of the West African Sahel. GBIF records it as a crop domesticated in the West African Sahel, the most drought- and heat-hardy of the major cereals, now grown as a warm-season annual across the world's hot, low-rainfall regions. The plant throws up stout, strappy-leaved stems topped by a dense, cylindrical, cattail-like spike that bears both the flowers and, later, the small round grain; purple-leaved ornamental forms such as "Purple Majesty" are also grown in the border for their dark, bold spikes. The grain is a nutritious, gluten-free staple ground into flour or cooked as porridge, so the harvest is the crop. HONESTY: this is a frost-tender, warm-season annual for full sun that is exceptionally drought- and heat-tolerant - it yields a grain crop on hot, sandy, low-rainfall ground where other cereals fail. Sow after the last frost once the soil is warm; it needs a long, warm season, and outside the tropics it is grown as a summer annual.

A spreading, rounded evergreen shrub from the southwestern Cape fynbos of South Africa, grown for flower heads that look exactly like brilliant orange, yellow, or red pincushions - a dome of nectar-rich flowers from which long curved styles project like pins - held over heart-based, blue-green leaves. It is one of the great Cape cut-flower exports and a Mediterranean-climate garden classic. Like the rest of the protea family it is phosphorus-sensitive: ordinary phosphate fertiliser or bone meal will kill it, because its cluster (proteoid) roots are adapted to nutrient-poor fynbos soils. It demands acidic, very sharply drained soil, full sun, and good air movement; it is drought-tolerant once established but rots in wet, rich, or limey ground, and it is frost-tender (RHS H3), so it grows outdoors only in warm, frost-free or Mediterranean climates and is a conservatory plant everywhere colder. In the wild the pincushion heads are worked for nectar by sunbirds and bees - it is chiefly bird-pollinated.

The world's most famous holiday plant is, in its homeland, a leggy tropical shrub. Native from Mexico to Guatemala, Euphorbia pulcherrima is grown almost everywhere as a compact potted gift for its blaze of winter color - but that color is not flowers. The showy red, pink, white, or marbled 'petals' are bracts (modified leaves); the true flowers are the small yellow-green cup-like cyathia clustered at the center. The bracts color up only in response to long, uninterrupted nights, which is why poinsettias turn for the winter holidays and why a houseplant in a lamp-lit room often refuses to re-color. It is frost-tender and hardy in the ground only in USDA zones 9a-11b, where it grows into an open, erect, multi-stemmed shrub 3 to 12 feet tall. A persistent caution: it is MILDLY toxic - the milky white latex (sap) can irritate skin and eyes and cause mild stomach upset if eaten - but its deadly reputation is a long-debunked myth, not a real hazard.