// SPECIES PROFILE · ANNUAL · NATIVE

Pleatleaf knotweed

Polygonum tenue

Pleatleaf knotweed (Polygonum tenue) is a annual in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2a–10a. Mature size 1"–20". Blooms Jun–Oct.

// QUICK FACTS

Family: —
Group: annual
Native range: Native to 36 U.S. states, including AL, AR, CT, DC, DE, GA…
USDA hardiness: Zones 2a–10a
Mature size: 1"–20"
Sun: —
Water: —
Bloom: Jun–Oct
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Pleatleaf knotweed (Polygonum tenue) — *Polygonum tenue* — Pleatleaf knotweed. Photo by Choess via Wikimedia Commons (CC BY-SA 3.0).

Field Notes

[ growing · ecology · siting · care ]

Pleatleaf knotweed (Polygonum tenue) is a annual in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2a–10a. Mature size 1"–20". Blooms Jun–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, pleatleaf knotweed pairs naturally with: Black-Eyed Susan (Rudbeckia hirta), Common Sunflower (Helianthus annuus), Swamp verbena (Verbena hastata), Slenderleaf false foxglove (Agalinis tenuifolia).