// SPECIES PROFILE · TREE · NATIVE

Little walnut

Juglans microcarpa

Little walnut (Juglans microcarpa) is a tree in the — family. Native range includes KS, OK. Hardy in zones 4a–10a. Mature size 12'–30'. Blooms Mar–Jun.

// QUICK FACTS

Family: —
Group: tree
Native range: Native to KS, NM, OK, TX
USDA hardiness: Zones 4a–10a
Mature size: 12'–30'
Sun: Part shade
Water: Medium
Bloom: Mar–Jun
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Little walnut (Juglans microcarpa) — *Juglans microcarpa* — Little walnut. Photo by Jerry Friedman via Wikimedia Commons (CC BY-SA 2.0).

Field Notes

[ growing · ecology · siting · care ]

Little walnut (Juglans microcarpa) is a tree in the — family. Native range includes KS, OK. Hardy in zones 4a–10a. Mature size 12'–30'. Blooms Mar–Jun.

Why it's on this list: native species profile. Native-range data from the Lady Bird Johnson Wildflower Center (NPIN), cross-checked against iNaturalist observations. Part of Rooted Revival's regional native plant catalog — true natives for Oklahoma, Arkansas, Missouri and Kansas.

Companion Planting

[ guild · polyculture · cross-layer pairings ]

In the same native range, little walnut pairs naturally with: Black Cherry (Prunus serotina), Black Locust (Robinia pseudoacacia), Bur Oak (Quercus macrocarpa), Chinkapin Oak (Quercus muehlenbergii).