// SPECIES PROFILE · ANNUAL · NATIVE

Horrid thistle

Cirsium horridulum var. horridulum

Horrid thistle (Cirsium horridulum var. horridulum) is a annual in the — family. Native range includes AR, OK. Hardy in zones 3a–11b. Mature size 38"–8'. Blooms Apr–Jun.

// QUICK FACTS

Family: —
Group: annual
Native range: Native to 23 U.S. states, including AL, AR, CT, DE, FL, GA…
USDA hardiness: Zones 3a–11b
Mature size: 38"–8'
Sun: —
Water: —
Bloom: Apr–Jun
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Horrid thistle (Cirsium horridulum var. horridulum) — *Cirsium horridulum var. horridulum* — Horrid thistle. Photo via iNaturalist — no rights reserved, uploaded by Craig Martin.

Field Notes

[ growing · ecology · siting · care ]

Horrid thistle (Cirsium horridulum var. horridulum) is a annual in the — family. Native range includes AR, OK. Hardy in zones 3a–11b. Mature size 38"–8'. Blooms Apr–Jun.

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, horrid thistle pairs naturally with: Common Sunflower (Helianthus annuus), Louisiana devil's-claw (Proboscidea louisianica), Swamp verbena (Verbena hastata), Slim amaranth (Amaranthus hybridus).