// SPECIES PROFILE · ANNUAL · NATIVE

Grooved flax

Linum sulcatum var. sulcatum

Grooved flax (Linum sulcatum var. sulcatum) is a annual in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2b–11b. Mature size 1"–30". Blooms May–Sep.

// QUICK FACTS

Family: —
Group: annual
Native range: Native to 34 U.S. states, including AL, AR, CT, FL, GA, IA…
USDA hardiness: Zones 2b–11b
Mature size: 1"–30"
Sun: —
Water: —
Bloom: May–Sep
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Grooved flax (Linum sulcatum var. sulcatum) — *Linum sulcatum var. sulcatum* — Grooved flax. Photo via iNaturalist — (c) harrier, some rights reserved (CC BY).

Field Notes

[ growing · ecology · siting · care ]

Grooved flax (Linum sulcatum var. sulcatum) is a annual in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2b–11b. Mature size 1"–30". Blooms May–Sep.

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, grooved flax pairs naturally with: Black-Eyed Susan (Rudbeckia hirta), Common Sunflower (Helianthus annuus), Swamp verbena (Verbena hastata), Slenderleaf false foxglove (Agalinis tenuifolia).