// SPECIES PROFILE · PERENNIAL · NATIVE

Twoleaf watermilfoil

Myriophyllum heterophyllum

Twoleaf watermilfoil (Myriophyllum heterophyllum) is a perennial in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2b–11b. Mature size 38"–8'. Blooms May–Oct.

// QUICK FACTS

Family: —
Group: perennial
Native range: Native to 35 U.S. states, including AL, AR, CT, DE, FL, GA…
USDA hardiness: Zones 2b–11b
Mature size: 38"–8'
Sun: —
Water: —
Bloom: May–Oct
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Twoleaf watermilfoil (Myriophyllum heterophyllum) — *Myriophyllum heterophyllum* — Twoleaf watermilfoil. Photo by Leslie J. Mehrhoff, University of Connecticut, Bugwood.org via Wikimedia Commons (CC BY 3.0).

Field Notes

[ growing · ecology · siting · care ]

Twoleaf watermilfoil (Myriophyllum heterophyllum) is a perennial in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2b–11b. Mature size 38"–8'. Blooms May–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, twoleaf watermilfoil pairs naturally with: Broadleaf Arrowhead (Sagittaria latifolia), Common Blue Violet (Viola sororia), Common Boneset (Eupatorium perfoliatum), Common Evening Primrose (Oenothera biennis).