Diamondpetal Evening Primrose

Oenothera rhombipetala

Diamondpetal evening primrose sends up tall spikes of diamond-shaped yellow evening flowers on deep sands of the central plains, a biennial that lights up late-summer dusk.

Family: Onagraceae
Type: wildflower
Lifespan: biennial
Height: 2–4 ft
Spacing: 1–1.5 ft apart
Light: sun
Soil moisture: dry
Soil pH: neutral, acidic
Bloom: July, August, September
Bloom colors: yellow
Wildlife value: pollinators, butterflies
Landscape uses: border
Native states: AR, IL, KS, MN, NE, OK, TX