Staphylea spp.

bladdernut

Staphyleaceae

Northern Hemisphere (North America, Europe, Asia)

Attracts Pollinators Attracts Butterflies Fragrant (light)

Native to North America

SunPart Shade – Full Sun

WaterMedium

HardinessZones 4–8

Overview

Staphylea spp. is a genus of about ten species of deciduous shrubs and small trees in the family Staphyleaceae, distributed across the temperate Northern Hemisphere in North America, Europe, and Asia. Plants grow 6-15 feet (1.8-4.6 m) tall, with some Asian species reaching 25-30 feet (7.5-9 m) as multi-stemmed small trees. The opposite leaves are compound, divided into three to seven toothed leaflets. In mid to late spring, pendulous panicles of white to pale pink bell-shaped flowers hang from the branch tips. The flowers are followed by inflated, papery seed capsules 1-2.5 inches (2.5-6 cm) long that resemble small bladders, splitting at maturity to release hard, glossy seeds; these capsules give the group its common name, bladdernut. Bark is smooth and gray, often with pale striations on young stems. Staphylea spp. grows in moist woodland, streambanks, and thickets, favoring part shade and consistently moist, well-drained soil. It spreads slowly by suckers to form colonies. The genus is slow to reach flowering size and can become open or leggy in deep shade, though it tolerates a range of soils where moisture stays steady.

Native Range

Staphylea spp. is distributed across the temperate Northern Hemisphere. S. trifolia grows in eastern North America, S. pinnata and S. colchica in Europe and the Caucasus, and several species including S. holocarpa and S. bumalda in China, Japan, and the Himalaya. Typical habitats are moist woodland, streambanks, and shaded thickets.

Suggested Uses

Staphylea spp. is used in woodland gardens, shaded shrub borders, and naturalized plantings along streams and woodland edges. Its suckering habit suits informal screening and bank stabilization in moist ground. The inflated capsules are used in dried arrangements.

How to Identify

Identify Staphylea spp. by its opposite, compound leaves divided into three to seven toothed leaflets and its pendulous spring panicles of white to pale pink bell-shaped flowers. The clearest mark is the fruit: an inflated, papery, bladder-like capsule 1-2.5 inches (2.5-6 cm) long that rattles with loose seeds when dry. Stems are smooth and gray, sometimes striped on new growth. Colonies often arise from slow suckering.

Appearance

Size & Dimensions

Height6' - 15'

Width/Spread6' - 12'

Colors

Flower Colors

Foliage Colors

Fall Foliage Colors

Bloom Information

Bloom Period

~3 weeks

Spring

Flowering occurs in mid to late spring, generally April to May, as or just after the leaves expand. The drooping clusters of bell-shaped flowers last about two to three weeks. Inflated seed capsules develop through summer and persist on the plant into autumn.

Detailed Descriptions

Flower Description

white to pale pink

Foliage Description

green

Growing Conditions

Sun Requirements

SunPartial Shade SunFull Sun

Requires 3-8 hours of direct sunlight daily

• Full Sun: 6+ hours of direct sunlight

• Partial Shade: 3-6 hours of direct sunlight

• Full Shade: Less than 3 hours of direct sunlight

Soil Requirements

pH Range5.5 - 7.5(Neutral)

357912

Soil Types

loam clay

Drainagewell drained

Water & Climate

Water Needs

Medium

Frost Tolerance

hardy

Time to Maturity

3-5 years

Care & Maintenance

Care Guide

Staphylea spp. grows in part shade to full sun and prefers consistently moist, well-drained soil enriched with organic matter. It tolerates clay and loam and a soil pH from about 5.5 to 7.5. Water needs are medium; plants decline in prolonged drought and grow poorly in dry, exposed sites. Most species are cold hardy across roughly USDA zones 4-8. Plants spread by suckers and can form thickets over time. Flowering improves with several hours of sun, while deep shade produces sparse bloom and open growth.

Pruning

Prune after flowering, since flowers form on the previous season wood. Remove crossing, dead, or weak stems and thin congested growth to open the shrub. Suckers can be cut or dug to limit colony spread, and old stems can be cut to the base over several years to renew leggy plants.