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A long-lived native perennial of central and eastern US woodland borders and prairie meadows with deep blue pea-shaped flowers in late spring, blue-green leguminous foliage, attractive black seed pods for winter interest, and a nitrogen-fixing root system (Fabaceae). Larval host for 6 documented butterfly species per NC State (orange sulphur, clouded sulphur, frosted elfin, eastern tailed-blue, hoary edge, wild indigo duskywing) - among the highest Lep-host-count perennials in the eastern flora.

What it needs

Conditions

Light

Full sun

Water

Moderate water

Spacing

6"

Habit

Tall, summer-growing cormous perennial with sword-shaped leaves and arching spikes of hooded orange-red-and-yellow summer flowers

Care tips

•

Treat it as a summer-growing corm: plant in spring, grow and flower through summer with regular water, then keep the dormant corm dry over winter. Watering or planting it on the winter-growing schedule of the Cape bulbs will rot it.

•

Give it full sun and well-drained soil, and stake the 3-5 foot spikes on exposed, windy sites so they do not topple.

•

In cold-winter areas, protect the corm - mulch deeply where it is marginally hardy (about USDA zone 7), or lift the corms after the foliage dies back and store them dry and frost-free, replanting in spring.

Lifecycle

Planting

Plant corms in spring, after the last hard frost, in full sun and well-drained soil - about 4 to 6 inches deep and 6 inches apart. This is a summer-growing corm, so it goes in as the soil warms and grows and flowers through the warm months; do not plant it in autumn like the winter-growing Cape bulbs.

Transplanting

Lift and divide dormant corms in autumn or early spring rather than disturbing the plant in active growth. In cold-winter areas (below about USDA zone 7), lift the corms after the foliage dies back and store them dry and frost-free over winter, replanting in spring.

Early growth

Water through spring and summer to keep the plant in active growth - it wants summer moisture in well-drained soil. Tall spikes may need staking on exposed sites. As summer ends the leaves yellow and die back; let them, because the dying foliage feeds the corm for next year.

Maturity

A mature plant is a clump of corms throwing up several 3-5 foot spikes of hooded orange-red-and-yellow flowers each summer, then going fully dormant for winter as a leafless corm. Each season the corm renews itself on top of the old one and produces offset cormels, so the clump slowly builds up.

Propagation

Propagate by separating the offset cormels from dormant corms in autumn or early spring; small cormels take a year or two of growing on to reach flowering size. It can also be raised from seed, though seedlings are slower to flower and variable.

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.

Baptisia australis

Blue false indigo

A bold, moisture-loving native perennial of eastern North America that dies back to a woody base each winter and returns to throw up stout 2 to 6 feet stems topped with enormous 4-8 inch saucer-shaped flowers - white, pink, red, or burgundy, each with a contrasting central eye - from June into September. NC State Extension describes a herbaceous perennial hardy across USDA zones 4a-9b that thrives in wet to constantly moist soils, tolerates heat, humidity, and even brief flooding, and draws hummingbirds, butterflies, and other pollinators. The tropical-looking dinner-plate blooms make it a dramatic focal point for rain gardens, pond edges, and the back of a sunny border.

Better fit now and in 2050

Now: well-suited

2050: well-suited

Hibiscus moscheutos

Hardy hibiscus

An architectural clump-forming perennial grown for its striking spherical, metallic steel-blue flowerheads - drumstick "globes" held on tall stems above spiny, deeply cut grey-green leaves that are white-woolly beneath. It blooms in mid to late summer and is one of the very best garden plants for pollinators: at the height of summer the blue globes are smothered in bees and butterflies. Genuinely drought-tolerant, it thrives in poor, dry, sharp-drained soil in full sun, where it earns its place as bold summer structure and stands well into winter as dried seedheads that feed goldfinches and other small birds.

Better fit now and in 2050

Now: well-suited

2050: well-suited

Echinops ritro

Globe thistle

Better fit now and in 2050

Now: well-suited

2050: well-suited

Eryngium planum

Blue sea holly

An architectural, branching perennial grown for the metallic steel-blue flush it takes on in summer: small, egg-shaped flowerheads, each ringed by a collar of spiny, silvery-blue bracts, are held on rigid, blue-tinted stems above a basal rosette of leathery, heart-shaped leaves. It is a tough, genuinely drought-tolerant plant for hot, dry, sharply drained, even poor sandy or gravelly soil in full sun - it resents rich, wet ground, where it rots and flops - which makes it ideal for gravel gardens and coastal, seaside plantings, and one of the best long-lasting cut and dried flowers. At the height of summer it is a magnet for bees, butterflies, and hoverflies. It is grown purely as an ornamental and is not eaten.

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.

Baptisia australis

Blue false indigo

A long-lived native perennial of central and eastern US woodland borders and prairie meadows with deep blue pea-shaped flowers in late spring, blue-green leguminous foliage, attractive black seed pods for winter interest, and a nitrogen-fixing root system (Fabaceae). Larval host for 6 documented butterfly species per NC State (orange sulphur, clouded sulphur, frosted elfin, eastern tailed-blue, hoary edge, wild indigo duskywing) - among the highest Lep-host-count perennials in the eastern flora.

An architectural, branching perennial grown for the metallic steel-blue flush it takes on in summer: small, egg-shaped flowerheads, each ringed by a collar of spiny, silvery-blue bracts, are held on rigid, blue-tinted stems above a basal rosette of leathery, heart-shaped leaves. It is a tough, genuinely drought-tolerant plant for hot, dry, sharply drained, even poor sandy or gravelly soil in full sun - it resents rich, wet ground, where it rots and flops - which makes it ideal for gravel gardens and coastal, seaside plantings, and one of the best long-lasting cut and dried flowers. At the height of summer it is a magnet for bees, butterflies, and hoverflies. It is grown purely as an ornamental and is not eaten.

An architectural clump-forming perennial grown for its striking spherical, metallic steel-blue flowerheads - drumstick "globes" held on tall stems above spiny, deeply cut grey-green leaves that are white-woolly beneath. It blooms in mid to late summer and is one of the very best garden plants for pollinators: at the height of summer the blue globes are smothered in bees and butterflies. Genuinely drought-tolerant, it thrives in poor, dry, sharp-drained soil in full sun, where it earns its place as bold summer structure and stands well into winter as dried seedheads that feed goldfinches and other small birds.

A bold, moisture-loving native perennial of eastern North America that dies back to a woody base each winter and returns to throw up stout 2 to 6 feet stems topped with enormous 4-8 inch saucer-shaped flowers - white, pink, red, or burgundy, each with a contrasting central eye - from June into September. NC State Extension describes a herbaceous perennial hardy across USDA zones 4a-9b that thrives in wet to constantly moist soils, tolerates heat, humidity, and even brief flooding, and draws hummingbirds, butterflies, and other pollinators. The tropical-looking dinner-plate blooms make it a dramatic focal point for rain gardens, pond edges, and the back of a sunny border.

Iris ensata is a beardless water iris native to Japan, China, Korea, and the Russian Far East, prized for some of the most spectacular midsummer flowers in the perennial garden - wide, flat blooms in purples, whites, and bicolors on upright stems to 30 inches. Fifteen cultivars hold RHS Award of Garden Merit recognition, and Japanese breeders have refined three distinct strains (Edo, Higo, Ise) over five centuries. The honest catch is demanding site requirements: it needs consistently moist, reliably acidic soil (pH 5.5–6.5) and resents lime; even slightly alkaline or dry soil leads to chlorosis, poor bloom, and eventual decline, making it unforgiving in gardens with alkaline tap water or drought.

A tough, EVERGREEN, rhizomatous iris relative from South Africa - native to the Cape Provinces and KwaZulu-Natal along the summer-rainfall eastern seaboard (POWO, Kew) - grown for fans of stiff, sword-shaped leaves and white, iris-like flowers marked with yellow and violet. Each flower lasts only a single day, but they are borne in repeated flushes over weeks, which earns the plant its nickname, the "fortnight lily." Unlike the dormant Cape bulbs it is grown alongside, this is an EVERGREEN rhizome with NO dormant season - a drought-tolerant, low-maintenance landscape workhorse for full sun or light shade that, once established, asks almost nothing and tolerates a wide range of soils. It is the HARDIEST of this Cape group (to about USDA zone 8b; the RHS rates it borderline-hardy, about H4) and is a reliable, low-care evergreen for warm-temperate and Mediterranean gardens. The wiry flower stems re-bloom, so leave them in place; tidy only the old leaves. It is bee- and insect-pollinated rather than bird-pollinated, and it is not a food plant.