Firebush

Eastern Australian temperate forests

Fynbos shrubland

New Zealand North Island temperate forests

Mountain hydrangea is a compact, deciduous flowering shrub native to the mountainous regions of Japan and Korea, where it grows in cool, moist, partly shaded conditions - and that cool mountain origin is the honest catch. Hardy through USDA Zone 6 when dormant, the plant breaks dormancy early and its new spring growth is reliably vulnerable to late frosts; a single late freeze in April can destroy an entire season's bloom on wood that would otherwise flower in midsummer. It is smaller and more refined than bigleaf hydrangea, with serrated leaves and distinctive lacecap flowerheads in blue or pink depending on soil pH, making it a graceful focal point for partly shaded borders where consistent moisture can be maintained.

What it needs

Conditions

Light

Full sun / Part shade

Water

Moderate water

Spacing

3-5 ft

Habit

Fast-growing, dense, spreading evergreen shrub with soft, reddish stems, often multi-trunked or clumping

Care tips

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Check the plant, not just the label: Florida's native firebush has hairy, red-tinged leaves and orange-red flowers, while plants sold as 'African', 'Dwarf', 'Compacta', or 'Firefly' are often the non-native var. glabra, with smooth leaves and mostly yellow flowers. Buy from a native-plant nursery if you want the native.

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Give it full sun for the most flowers; it grows in partial shade, but flowering drops off there.

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Fertilize sparingly and keep lawn grass out of its root zone.

Lifecycle

Planting

Plant in full sun for the most flowers; it tolerates partial shade, but UF/IFAS notes that flowering is much reduced there. It takes acid or alkaline soil, including the limestone soils of South Florida, in sand, loam, or clay, and tolerates occasionally wet ground as long as it drains. UF/IFAS lists planting months of April to September in zone 9 and February to December in zones 10 and 11, and UF/IFAS Gardening Solutions suggests late spring or summer planting, watered regularly until established.

Transplanting

Set container-grown plants 3 to 5 feet apart, the UF/IFAS spacing. Keep lawn grass out of the root zone. Where it is not winter hardy, grow it in a container that can come indoors for winter, or plant it in the ground as a summer annual after frost.

Early growth

Growth is fast. Water regularly until the roots establish, then moderately; it takes heat and some drought once settled but grows best with steady moisture. Fertilize sparingly, since UF/IFAS advises that a lean diet brings out its best. Aphids may attack new growth in early spring, but natural predators usually check them quickly.

Maturity

A mature plant reaches 6 to 12 feet tall and 5 to 8 feet wide, and more with support. It is tender: a freeze can kill it to the ground, but regrowth from the roots is rapid, and UF/IFAS reports it root-hardy through zone 9. UF/IFAS Gardening Solutions advises pruning no lower than about 5 to 8 feet, since hard or frequent pruning reduces flowering, and a clipped hedge loses many of its flowers. Scales, mites, and in South Florida a leaf-eating caterpillar are occasional, minor problems.

Propagation

Propagate by fresh seed, stem cuttings, or air layers; NC State recommends stem cuttings. Because the non-native Hamelia patens var. glabra may hybridize with Florida's native firebush, take cuttings or seed from a plant you know is the native form rather than from a mixed planting.

Native range

Worldwide native range.

Climate notes

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Most sources start the range at zone 9 and split on where it ends. UF/IFAS's Florida fact sheet gives USDA hardiness zones 9 through 11, the Florida Native Plant Society lists 9A to 11, and the Florida Association of Native Nurseries says it succeeds outdoors in zones 10, 11, and the warmer parts of zone 9, while NC State Extension's Plant Toolbox lists 9a-10b and the Missouri Botanical Garden's PlantFinder gives zones 9 to 10. The published 9a-11b follows the majority at each edge, and the plant grows wild south through the frost-free Florida Keys, which lie in zone 11.

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At the cold end it is tender: a freeze can kill it to the ground, and in zone 9 it survives by regrowing from the roots, which UF/IFAS reports as rapid. UF/IFAS Gardening Solutions calls it a root-hardy perennial in North Florida, where it dies back after the first freeze and returns in spring, and gives a planting range of zones 8-11; the Florida Native Plant Society says it usually resprouts from the base after a freeze. Below zone 9, grow it as a summer annual or a container plant brought indoors for winter.

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A native of Florida and tropical America: Kew's WCVP gives a native range from Florida, the Bahamas, and the Caribbean through Mexico and Central America to South America as far as Bolivia, Paraguay, Brazil, and Argentina, and USDA PLANTS lists it as native in the lower 48 states, Puerto Rico, and the U.S. Virgin Islands. In Florida, UF/IFAS says it grows naturally from Sumter County southward.

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Several firebushes are sold under this name. Florida's native plant is Hamelia patens var. patens, with hairy, red-tinged leaves usually in whorls of three and orange-red flowers. Hamelia patens var. glabra, native from southern Mexico to northern South America and Trinidad, has smooth leaves usually in whorls of four and mostly yellow flowers with an orange-red base, and is sold as 'African', 'Dwarf', 'Compacta', or 'Firefly' firebush (sometimes as Hamelia nodosa); some 'Compacta' plants, and the selection 'Calusa', are the native variety. 'Bahama firebush' is a separate species, Hamelia cuprea, from Jamaica, Cuba, Haiti, and the Cayman Islands. Kew's WCVP treats both varieties as one species, so the native range above covers both.

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UF/IFAS rates it not known to be invasive, and it is native in Florida. Outside its native range it is a weed risk: the Pacific Island Ecosystems at Risk (PIER) weed risk assessment for Hawaii and the Pacific islands scores it 7, a high-risk result, meaning it poses a high risk of becoming a serious pest there. The assessment notes that birds spread the seeds, which germinate readily, and that in its native range it quickly occupies newly disturbed ground. PIER records it as introduced, mostly in cultivation, on Guam, Palau, the Marshall Islands, and the Galapagos, with a 1927 herbarium record from Oahu; the assessment did not find it naturalized outside its native range. The Florida Native Plant Society reports recent sightings in north Florida, north of its natural range, where it appears to be naturalizing. Within Florida, the Florida Association of Native Nurseries also warns about the non-native var. glabra, which readily escapes from seed and may hybridize with the native firebush.

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NC State lists it as heat, humidity, and salt tolerant, and UF/IFAS Gardening Solutions calls it moderately tolerant of salt spray, but the UF/IFAS fact sheet rates its soil salt tolerance as poor and the Florida Native Plant Society gives it low or no tolerance of salty wind or direct salt spray, so keep it back from the beachfront. A strong wind can brown the leaves.

Plant this, not that

Better fit for this place

For Chicago, IL, these are replacement suggestions: similar plants with a stronger hardiness fit now and/or in 2050.

Hydrangea serrata

Mountain hydrangea

A four-season native shrub of the southeastern United States, where NC State Extension notes it grows wild in moist woods and along stream banks. It is an upright, multi-stemmed deciduous shrub, slow-growing to roughly 4 to 8 feet tall and 4 to 10 feet wide, named for its large, oak-shaped, lobed dark-green leaves. Showy pyramidal 4-12 inch panicles of creamy-white flowers open from late spring into summer and fade to pink and then tan, while the bold foliage turns wine, orange, and mahogany in fall over peeling cinnamon bark. Easy and low-maintenance in organically rich, well-drained soil, it is grown as a specimen, in masses, or as an informal hedge.

Part sun / Part shade

Better fit now and in 2050

Now: well-suited

2050: well-suited

Hydrangea quercifolia

Oakleaf hydrangea

A large deciduous European-native shrub grown for a three-season show: maple-like lobed leaves that color well in autumn, flat white lacecap flower clusters in late spring, and heavy drooping bunches of translucent red berries that hang on into winter. Each flower head is a showy ring of large sterile outer florets surrounding a fertile center, giving the lacecap its distinctive look. It is one of the best all-round wildlife shrubs you can plant - the open flowers feed hoverflies and bees, and the red fruit feeds birds through the cold months - and it tolerates wet soil, making it a natural choice for hedgerows, damp corners, and wild gardens. Two honest cautions go with it: the raw berries are mildly toxic to people, and this is the European guelder rose, not the North American cranberrybush.

Better fit now and in 2050

Now: well-suited

2050: well-suited

Viburnum opulus

Guelder rose

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.

Better fit now and in 2050

Now: well-suited

2050: well-suited

Kolkwitzia amabilis

Beauty bush

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.

Better fit now and in 2050

Now: well-suited

2050: well-suited

Similar plants

Browse lateral options with similar roles, light needs, size, or native-range overlap; these are not filtered for a better climate fit.

Camellia sasanqua

Sasanqua camellia

Full sun / Part sun / Part shade

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.

Mountain hydrangea is a compact, deciduous flowering shrub native to the mountainous regions of Japan and Korea, where it grows in cool, moist, partly shaded conditions - and that cool mountain origin is the honest catch. Hardy through USDA Zone 6 when dormant, the plant breaks dormancy early and its new spring growth is reliably vulnerable to late frosts; a single late freeze in April can destroy an entire season's bloom on wood that would otherwise flower in midsummer. It is smaller and more refined than bigleaf hydrangea, with serrated leaves and distinctive lacecap flowerheads in blue or pink depending on soil pH, making it a graceful focal point for partly shaded borders where consistent moisture can be maintained.

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.

Part sun / Part shade

Shrubby scorpion vetch

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, 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.