// SPECIES PROFILE · ANNUAL · NATIVE

Bushy knotweed

Polygonum ramosissimum var. prolificum

Bushy knotweed (Polygonum ramosissimum var. prolificum) is a annual in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2a–10a. Mature size 29"–6'. Blooms Jul–Nov.

// QUICK FACTS

Family: —
Group: annual
Native range: Native to 45 U.S. states, including AK, AR, AZ, CA, CO, CT…
USDA hardiness: Zones 2a–10a
Mature size: 29"–6'
Sun: —
Water: —
Bloom: Jul–Nov
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Bushy knotweed (Polygonum ramosissimum var. prolificum) — *Polygonum ramosissimum var. prolificum* — Bushy knotweed. Photo via iNaturalist — (c) Zihao Wang, some rights reserved (CC BY).

Field Notes

[ growing · ecology · siting · care ]

Bushy knotweed (Polygonum ramosissimum var. prolificum) is a annual in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2a–10a. Mature size 29"–6'. Blooms Jul–Nov.

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, bushy knotweed pairs naturally with: Common Sunflower (Helianthus annuus), Pitseed goosefoot (Chenopodium berlandieri), Pitseed goosefoot (Chenopodium berlandieri var. boscianum), Bush's goosefoot (Chenopodium berlandieri var. bushianum).