// SPECIES PROFILE · PERENNIAL · NATIVE

Illinois pondweed

Potamogeton illinoensis

Illinois pondweed (Potamogeton illinoensis) is a perennial in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2a–11b. Mature size 6"–4'. Blooms Jun–Nov.

// QUICK FACTS

Family: —
Group: perennial
Native range: Native to 45 U.S. states, including AL, AR, AZ, CA, CO, CT…
USDA hardiness: Zones 2a–11b
Mature size: 6"–4'
Sun: —
Water: —
Bloom: Jun–Nov
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Illinois pondweed (Potamogeton illinoensis) — *Potamogeton illinoensis* — Illinois pondweed. Photo via iNaturalist — (c) Samuel A Schmid, PhD, PWS, some rights reserved (CC BY), uploaded by Samuel A Schmid, PhD, PWS.

Field Notes

[ growing · ecology · siting · care ]

Illinois pondweed (Potamogeton illinoensis) is a perennial in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2a–11b. Mature size 6"–4'. Blooms Jun–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, illinois pondweed pairs naturally with: Broadleaf Arrowhead (Sagittaria latifolia), Lady Fern (Athyrium filix-femina), Wild Strawberry (Fragaria virginiana), Yarrow (Achillea millefolium).