// SPECIES PROFILE · TREE · NATIVE

Rock elm

Ulmus thomasii

Rock elm (Ulmus thomasii) is a tree in the — family. Native range includes AR, KS, MO. Hardy in zones 2b–8a. Mature size 40'–100'. Blooms Mar–Apr.

// QUICK FACTS

Family: —
Group: tree
Native range: Native to 23 U.S. states, including AR, CT, IA, IL, IN, KS…
USDA hardiness: Zones 2b–8a
Mature size: 40'–100'
Sun: Part shade
Water: High · moisture-loving
Bloom: Mar–Apr
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Rock elm (Ulmus thomasii) — *Ulmus thomasii* — Rock elm. Photo by Ronnie Nijboer via Wikimedia Commons (CC0).

Field Notes

[ growing · ecology · siting · care ]

Rock elm (Ulmus thomasii) is a tree in the — family. Native range includes AR, KS, MO. Hardy in zones 2b–8a. Mature size 40'–100'. Blooms Mar–Apr.

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, rock elm pairs naturally with: Black Locust (Robinia pseudoacacia), Bur Oak (Quercus macrocarpa), Common Hackberry (Celtis occidentalis), Eastern Cottonwood (Populus deltoides).