// SPECIES PROFILE · PERENNIAL · NATIVE

Swamp smartweed

Polygonum hydropiperoides

Swamp smartweed (Polygonum hydropiperoides) is a perennial in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 1a–11b. Mature size 6"–3'. Blooms May–Nov.

// QUICK FACTS

Family: —
Group: perennial
Native range: Native to 46 U.S. states, including AK, AL, AR, AZ, CA, CT…
USDA hardiness: Zones 1a–11b
Mature size: 6"–3'
Sun: Full sun
Water: Medium
Bloom: May–Nov
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Swamp smartweed (Polygonum hydropiperoides) — *Polygonum hydropiperoides* — Swamp smartweed. Photo by Gordon Leppig & Andrea J. Pickart via Wikimedia Commons (Public domain).

Field Notes

[ growing · ecology · siting · care ]

Swamp smartweed (Polygonum hydropiperoides) is a perennial in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 1a–11b. Mature size 6"–3'. Blooms May–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, swamp smartweed pairs naturally with: Lady Fern (Athyrium filix-femina), Wild Strawberry (Fragaria virginiana), Yarrow (Achillea millefolium), Common selfheal (Prunella vulgaris).