// SPECIES PROFILE · ANNUAL · NATIVE

Hoary tansyaster

Machaeranthera canescens

Hoary tansyaster (Machaeranthera canescens) is a annual in the — family. Native range includes KS, OK. Hardy in zones 2a–11a. Mature size 6"–3'. Blooms Aug–Oct.

// QUICK FACTS

Family: —
Group: annual
Native range: Native to 20 U.S. states, including AZ, CA, CO, IA, ID, KS…
USDA hardiness: Zones 2a–11a
Mature size: 6"–3'
Sun: —
Water: —
Bloom: Aug–Oct
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Hoary tansyaster (Machaeranthera canescens) — *Machaeranthera canescens* — Hoary tansyaster. Photo by Stan Shebs via Wikimedia Commons (CC BY-SA 3.0).

Field Notes

[ growing · ecology · siting · care ]

Hoary tansyaster (Machaeranthera canescens) is a annual in the — family. Native range includes KS, OK. Hardy in zones 2a–11a. Mature size 6"–3'. Blooms Aug–Oct.

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, hoary tansyaster pairs naturally with: Common Sunflower (Helianthus annuus), Swamp verbena (Verbena hastata), Annual ragweed (Ambrosia artemisiifolia var. artemisiifolia), Field sagewort (Artemisia campestris).