// SPECIES PROFILE · PERENNIAL · NATIVE

White milkwort

Polygala alba

White milkwort (Polygala alba) is a perennial in the — family. Native range includes AR, KS, OK. Hardy in zones 2a–10b. Mature size 1"–20". Blooms Apr–Nov.

// QUICK FACTS

Family: —
Group: perennial
Native range: Native to 12 U.S. states, including AR, AZ, CO, KS, MT, ND…
USDA hardiness: Zones 2a–10b
Mature size: 1"–20"
Sun: Part shade
Water: Low · xeric
Bloom: Apr–Nov
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

White milkwort (Polygala alba) — *Polygala alba* — White milkwort. Photo by Mason Brock (Masebrock) via Wikimedia Commons (Public domain).

Field Notes

[ growing · ecology · siting · care ]

White milkwort (Polygala alba) is a perennial in the — family. Native range includes AR, KS, OK. Hardy in zones 2a–10b. Mature size 1"–20". Blooms Apr–Nov. Low water use makes it a strong candidate for xeric and drought-conscious plantings.

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, white milkwort pairs naturally with: Broadleaf Arrowhead (Sagittaria latifolia), Lady Fern (Athyrium filix-femina), Mexican Hat (Ratibida columnifera), Sneezeweed (Helenium autumnale).