// SPECIES PROFILE · GRASS · NATIVE

Redroot flatsedge

Cyperus erythrorhizos

Redroot flatsedge (Cyperus erythrorhizos) is a grass in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2a–11b. Mature size 1"–40". Blooms Jun–Aug.

// QUICK FACTS

Family: —
Group: grass
Native range: Native to 48 U.S. states, including AL, AR, AZ, CA, CO, CT…
USDA hardiness: Zones 2a–11b
Mature size: 1"–40"
Sun: —
Water: —
Bloom: Jun–Aug
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Redroot flatsedge (Cyperus erythrorhizos) — *Cyperus erythrorhizos* — Redroot flatsedge. Photo by Fredlyfish4 via Wikimedia Commons (CC BY-SA 4.0).

Field Notes

[ growing · ecology · siting · care ]

Redroot flatsedge (Cyperus erythrorhizos) is a grass in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2a–11b. Mature size 1"–40". Blooms Jun–Aug.

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, redroot flatsedge pairs naturally with: Awlfruit sedge (Carex stipata), Broadleaf cattail (Typha latifolia), Tapered rosette grass (Dichanthelium acuminatum), Tapered rosette grass (Dichanthelium acuminatum var. acuminatum).