// SPECIES PROFILE · PERENNIAL · NATIVE

Swamp loosestrife

Decodon verticillatus

Swamp loosestrife (Decodon verticillatus) is a perennial in the — family. Native range includes AR, MO. Hardy in zones 2b–11b. Mature size 4'–10'. Blooms Jul–Sep.

// QUICK FACTS

Family: —
Group: perennial
Native range: Native to 33 U.S. states, including AL, AR, CT, DC, DE, FL…
USDA hardiness: Zones 2b–11b
Mature size: 4'–10'
Sun: Full sun
Water: High · moisture-loving
Bloom: Jul–Sep
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Swamp loosestrife (Decodon verticillatus) — *Decodon verticillatus* — Swamp loosestrife. Photo by Antepenultimate via Wikimedia Commons (CC BY-SA 4.0).

Field Notes

[ growing · ecology · siting · care ]

Swamp loosestrife (Decodon verticillatus) is a perennial in the — family. Native range includes AR, MO. Hardy in zones 2b–11b. Mature size 4'–10'. Blooms Jul–Sep.

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 loosestrife pairs naturally with: Broadleaf Arrowhead (Sagittaria latifolia), Blue-Eyed Grass (Sisyrinchium angustifolium), Butterfly Milkweed (Asclepias tuberosa), Cardinal Flower (Lobelia cardinalis).