// SPECIES PROFILE · ANNUAL · NATIVE

Fourpoint evening-primrose

Oenothera rhombipetala

Fourpoint evening-primrose (Oenothera rhombipetala) is a annual in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2b–10a. Mature size 2'–5'. Blooms May–Sep.

// QUICK FACTS

Family: —
Group: annual
Native range: Native to 16 U.S. states, including AR, IA, IL, KS, LA, MI…
USDA hardiness: Zones 2b–10a
Mature size: 2'–5'
Sun: Part shade
Water: Low · xeric
Bloom: May–Sep
Wildlife value: Pollinator and wildlife support
Ecological role: native species profile

Fourpoint evening-primrose (Oenothera rhombipetala) — *Oenothera rhombipetala* — Fourpoint evening-primrose. Photo by Dr. Thomas Barnes, Universtiy of Kentucky via Wikimedia Commons (Public domain).

Field Notes

[ growing · ecology · siting · care ]

Fourpoint evening-primrose (Oenothera rhombipetala) is a annual in the — family. Native range includes AR, KS, MO, OK. Hardy in zones 2b–10a. Mature size 2'–5'. Blooms May–Sep. Low water use makes it a strong candidate for xeric and drought-conscious plantings.

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, fourpoint evening-primrose pairs naturally with: Black-Eyed Susan (Rudbeckia hirta), Common Sunflower (Helianthus annuus), Plains Coreopsis (Coreopsis tinctoria), Swamp verbena (Verbena hastata).