Silverbush

Coronilla valentina is a compact, evergreen Mediterranean shrub in the legume family (Fabaceae), with a native range spanning the Mediterranean Basin from Portugal and Spain through Italy, the NW Balkans and Greece to the Aegean and Turkey, and south across northwest Africa to Libya. In a warm, sheltered garden spot it rewards with prolific, intensely honey-scented yellow flowers from late winter into summer and handsome glaucous foliage year-round. The honest catch is cold-hardiness: RHS rates it H4 (hardy to about 14°F), so it is borderline at the cold edge of USDA zone 7 and is liable to be cut to the ground or killed outright in a hard freeze, demanding a sheltered south- or west-facing wall in colder gardens - and the whole plant is toxic to humans and livestock.

Cape honeysuckle (Tecomaria capensis, Bignoniaceae) is a vigorous, evergreen scrambling shrub from southern and south-central Africa, valued for tubular orange-to-apricot flowers borne erratically across much of the year. It reaches about 6.6 to 9.8 feet tall and wide as a free-standing shrub, or can be trained much taller on a trellis or wall, and is widely used for informal hedging and as a hot-color border or container plant. It is frost-tender (RHS H1C; roughly USDA 9b-11) - in cooler climates it is grown under glass or as a summer container plant and overwintered indoors. In frost-free, mild climates it can become weedy: it has naturalised and is treated as invasive in parts of Australia and on islands such as the Azores, so site it where suckering and self-layering can be managed. It is not a recognised edible and is not flagged as notably toxic, though several plant parts feature in traditional southern-African medicine; treat it as ornamental rather than for consumption. Note the accepted binomial here is Tecomaria capensis (POWO/GBIF); the widely-seen Tecoma capensis is a synonym.

Crimson bottlebrush (formerly Callistemon citrinus, and still sold and grown under that name almost everywhere) is a bold evergreen shrub native to New South Wales, Queensland, and Victoria in eastern Australia. From spring through fall - and nearly year-round in frost-free climates - it carries dense, cylindrical, crimson-red 'bottlebrush' flower spikes packed with long protruding stamens, held above narrow, lance-shaped leaves dotted with oil glands that release a distinct lemony citrus scent when bruised (the species epithet citrinus means 'related to citrus'). Left unpruned it can reach 10 to 15 feet tall and wide as a large shrub or small tree, but it is more commonly trained as a 3 to 5 feet shrub, and it tolerates hard pruning well, regenerating new growth from old wood. It wants full sun and does best in moist, fertile, well-drained soil, though it tolerates waterlogging and, once established, drought; it prefers acid soil, and its leaves can yellow in alkaline or salty ground. It is frost-tender: NC State puts its winter hardiness at only 20 to 25°F and says it needs winter protection in zone 8. USDA PLANTS lists no invasive or noxious status for it in the US, Plants For A Future gives it no weed potential, and NC State Extension lists it as non-toxic to cats, dogs, and horses - though it is grown as an ornamental, not a food crop.

Firebush (also called scarlet bush, hummingbird bush, and Mexican firecracker) is a fast-growing, evergreen, soft-stemmed shrub in the coffee family (Rubiaceae) and a Florida native: it grows wild from central Florida south through the Florida Keys, and on through the Bahamas, the Caribbean, Mexico, and Central America into South America as far as Argentina. In a frost-free landscape it forms a dense, spreading shrub of 6 to 12 feet, occasionally to 15 feet, with whorls of oval leaves that are red-hairy when young and speckled red or purple at maturity, reddish stems, and terminal clusters of slender, tubular, orange-red flowers 0.5 to 1.5 inches long nearly all year. Hummingbirds and butterflies work the flowers, and birds eat the small berries, which ripen from red to black and are edible. It is frost-tender: a freeze can kill it to the ground, it regrows from the roots through zone 9, and farther north it is grown as a 2 to 3 feet summer annual or container plant. Buy with care, because several non-native firebushes are sold under the same name: plants labeled 'African', 'Dwarf', 'Compacta', or 'Firefly' are often Hamelia patens var. glabra, a variety from southern Mexico to northern South America with smooth leaves and mostly yellow flowers, and 'Bahama firebush' is a different species, Hamelia cuprea. Florida's native form is Hamelia patens var. patens, the plant this record describes.

Sasanqua camellia is an evergreen shrub native to the forests of southern Japan - Kyushu, Shikoku, and the Ryukyu Islands - where it grows on forest margins and hillsides. In gardens it is prized as the earliest-flowering camellia, bearing fragrant blooms from September through January when almost nothing else is in flower, and it tolerates more sun and drought than its cousin Camellia japonica. The honest catch is cold hardiness: open flowers are blackened by hard frost, and the plant itself is reliably hardy only from zone 7a south, making it unsuitable for much of the northeastern and midwestern United States without meaningful shelter.

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).