// SPECIES PROFILE · PERENNIAL · NATIVE

Western yarrow

Achillea millefolium var. occidentalis

Western yarrow (Achillea millefolium var. occidentalis) is a perennial in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 1a–11b. Mature size 6"–3'. Blooms Apr–Jul.

// QUICK FACTS

Family: —
Group: perennial
Native range: Native to 50 U.S. states, including AK, AL, AR, AZ, CA, CO…
USDA hardiness: Zones 1a–11b
Mature size: 6"–3'
Sun: Part shade
Water: Medium
Bloom: Apr–Jul
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Western yarrow (Achillea millefolium var. occidentalis) — *Achillea millefolium var. occidentalis* — Western yarrow. Photo via iNaturalist — (c) Eric Lamb, some rights reserved (CC BY).

Field Notes

[ growing · ecology · siting · care ]

Western yarrow (Achillea millefolium var. occidentalis) is a perennial in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 1a–11b. Mature size 6"–3'. Blooms Apr–Jul.

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, western yarrow pairs naturally with: Lady Fern (Athyrium filix-femina), Wild Strawberry (Fragaria virginiana), Yarrow (Achillea millefolium), Common selfheal (Prunella vulgaris).