Ninebark

Growing Conditions

Growing Zones

Thrives in USDA Zones 2 - 8

Companion Planting

When to Plant

• Transplant

  Plant container-grown or bare-root stock in spring after soil is workable, or in fall before hard frost; fall planting preferred in zones 5–8

• Direct Sow

  Plant container-grown or bare-root stock in spring or fall; hardwood cuttings root easily in late fall

• Harvest

  No edible harvest; ornamental and wildlife value only

Organic Growing Tips

• Rejuvenate overgrown plants by cutting one-third of oldest stems to the ground each year.

• The straight species has better insect and bird value than ornamental purple cultivars.

• Excellent choice for steep banks and erosion control; roots bind soil effectively.

• Plant en masse as a native hedge or screen with exceptional seasonal interest.

Common Pests

• Powdery Mildew
• Fire Blight
• Aphids

Taxonomy

Kingdom

Plantae

Family

Rose family (Rosaceae)

Genus

Physocarpus

Species

opulifolius

Natural History

Physocarpus opulifolius is native to eastern and central North America, growing naturally along streambanks, rocky slopes, and woodland edges from Quebec to the southern Appalachians and westward to the Great Plains. The genus name derives from the Greek physa (bladder) and karpos (fruit), referring to its inflated seed pods. Indigenous peoples across its native range found practical and medicinal uses for the bark. By the early twentieth century, European horticulturists were breeding ornamental forms, and the 1995 introduction of 'Diabolo' with its deep burgundy foliage transformed ninebark into a mainstream landscape shrub without diminishing its exceptional cold hardiness and site adaptability.

Traditional Use

Several Indigenous nations of eastern and central North America documented uses for ninebark bark and inner bark in traditional practice. Historical records describe bark preparations applied externally to skin conditions and used in contexts related to muscular complaints. Ethnobotanical accounts from the late nineteenth and early twentieth centuries, particularly among Great Lakes and Plains nations, provide the most detailed recorded contexts.

• Ojibwe (Anishinaabe), Great Lakes region, documented by Huron Smith, 1932 - inner bark

  Smith's ethnobotanical records note that Ojibwe practitioners scraped the inner bark and applied it externally to sores and skin irritations, with bark described as having an astringent character.

• Cheyenne, Great Plains, documented in early twentieth-century ethnobotanical accounts - bark

  Cheyenne records describe bark preparations associated with muscular soreness and fatigue, used externally in traditional practice contexts documented by ethnobotanists.

No parts of ninebark are considered edible; bark and foliage contain compounds that may be irritating if ingested, and the plant is grown strictly as an ornamental and wildlife shrub.

This information is provided for historical and educational purposes only and is not medical advice. Always consult a qualified healthcare professional before making decisions related to your health.

Morphology (Plant Structure & Identification)

• Root System

  Fibrous and densely branching, spreading widely from the crown; excellent for erosion control on slopes but not suited to very small beds where roots will crowd adjacent perennials.

• Stem

  Multiple arching stems emerge from the crown, displaying the distinctive exfoliating bark that peels in thin papery layers - a key identification feature and winter ornamental asset; annual removal of the oldest stems in late winter keeps the shrub vigorous and the arching form open.

• Leaves

  Alternate, lobed leaves resemble small maple or viburnum leaves; purple-leafed cultivars maintain color best in full sun and fade toward green in deep shade, which is useful when choosing placement.

• Flowers

  Rounded clusters of small five-petaled white to pale pink flowers appear in late spring to early summer, attracting native bees, bumblebees, and beneficial parasitic wasps; flowers are followed by reddish seed clusters that persist into winter and provide bird forage.

• Fruit

  Inflated, papery follicle clusters ripen to reddish-brown by late summer; they are not edible but provide persistent visual interest and seed for natural dispersal or intentional propagation.

Known Varieties

Common cultivars worth knowing

• Diabolo (Monlo)

  The cultivar that brought ninebark into mainstream horticulture; produces very deep burgundy-purple foliage that holds color well into summer, reaching 8–10 feet.

  Best for: Bold foliage contrast in mixed borders and as a specimen shrub

• Little Devil

  A compact dwarf form reaching only 3–4 feet with the same deep burgundy foliage as Diabolo, suitable for smaller spaces and containers.

  Best for: Small gardens, containers, and low hedges

• Summer Wine

  Mounding form to 5–6 feet with wine-red foliage and abundant pink-tinged flowers; slightly finer texture than Diabolo.

  Best for: Mid-border use and naturalistic planting designs

• Dart's Gold

  Bright chartreuse-yellow spring foliage that contrasts sharply with dark-leaved companions; reaches 4–5 feet and fades to yellow-green by midsummer.

  Best for: Foliage contrast and brightening shaded edges

• Physocarpus opulifolius (straight species)

  The native green-leaved species with the broadest ecological value - supports a wider array of native bees, beetles, and birds than heavily pigmented cultivars.

  Best for: Native plantings, wildlife gardens, and riparian restoration