Caucasian wingnut (Pterocarya fraxinifolia) is a deciduous tree native to the Caucasus and northern Iran that grows 30 to 60 feet tall, occasionally reaching 90 feet, with an equally broad spread. Its true spectacle arrives in early summer when female catkins develop into pendulous strings of small, winged nutlets that dangle up to 20 inches long, maturing from green to brown and often persisting into winter. Hardy in zones 5 through 8, this walnut-family member combines ornamental drama with surprising toughness, handling drought and compacted soils while thriving in full sun. Its extensive root system and tendency to sucker freely make it a powerful landscape presence that feels both wild and architectural.
Full Sun
Moderate
5-8
720in H x 720in W
—
Moderate
Hover over chart points for details
The real star here is those fruit display: after spring flowers fade to insignificance, the tree produces distinctive chains of winged nutlets that hang like delicate green garlands through summer, ripening to rich brown in fall and persisting well into winter. Most trees in cultivation don't offer this kind of showy, extended visual interest. Beyond its ornamental fruit, this species is genuinely tough, tolerating drought once established, hard compacted soils, and the kind of neglect that sends many trees into decline. It develops an extensive root system that anchors it firmly, though gardeners should know it suckers freely from the base, which can be a feature or a challenge depending on your vision for the space.
Caucasian wingnut serves primarily as an ornamental shade tree, prized for its dramatic seasonal display and architectural branching structure. The showy fruit chains provide extended visual interest from early summer through winter, making it particularly valuable in landscape compositions where year-round form matters. Its ability to handle difficult growing conditions while producing such striking foliage and fruiting displays means it excels in parks, larger gardens, and naturalistic plantings where a statement tree is needed.
No timeline data available yet for this variety.
Prune Caucasian wingnut in late winter or early spring while dormant to shape the tree and remove any suckering growth from the base if a single trunk is desired. Remove crossing or damaged branches to maintain an open, balanced canopy. Since the tree naturally develops an extensive, spreading form, pruning is typically light and focused on structure rather than size reduction.
Enter your ZIP code to see a personalized growing calendar for this plant.
“Native to the mountainous regions between the Caucasus and northern Iran, Caucasian wingnut has inhabited these regions for millennia. The tree gets its common name from the distinctive winged fruits that develop from its catkins, a characteristic that makes it instantly recognizable in its native landscapes. It arrived in European and North American cultivation as plant explorers and botanical collectors brought seeds and specimens from the Caucasus region, eventually becoming established in botanical gardens and arboreta where its unique fruit display drew sustained attention. The species has maintained steady presence in horticulture ever since, valued for combining ornamental qualities with exceptional hardiness.”