// SPECIES PROFILE · PERENNIAL · NATIVE

Limestone bittercress

Cardamine douglassii

Limestone bittercress (Cardamine douglassii) is a perennial in the — family. Native range includes AR, MO. Hardy in zones 2b–9a. Mature size 6"–1'. Blooms Mar–Apr.

// QUICK FACTS

Family: —
Group: perennial
Native range: Native to 23 U.S. states, including AL, AR, CT, DC, IA, IL…
USDA hardiness: Zones 2b–9a
Mature size: 6"–1'
Sun: Part shade
Water: High · moisture-loving
Bloom: Mar–Apr
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Limestone bittercress (Cardamine douglassii) — *Cardamine douglassii* — Limestone bittercress. Photo by Fritzflohrreynolds via Wikimedia Commons (CC BY-SA 3.0).

Field Notes

[ growing · ecology · siting · care ]

Limestone bittercress (Cardamine douglassii) is a perennial in the — family. Native range includes AR, MO. Hardy in zones 2b–9a. Mature size 6"–1'. 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, limestone bittercress pairs naturally with: Broadleaf Arrowhead (Sagittaria latifolia), Blue-Eyed Grass (Sisyrinchium angustifolium), Butterfly Milkweed (Asclepias tuberosa), Cardinal Flower (Lobelia cardinalis).