A low, sprawling perennial with large canary-yellow evening flowers that open at dusk and fade by morning. It is grown in full sun in lean, free-draining soil, where it is suited to rock gardens and groundcover.
Family
Onagraceae (Evening-primrose family)
Light
Full sun
Water
Water sparingly, letting the soil dry out between waterings; avoid waterlogging, especially in winter.
Soil
Poor, stony, well-drained soil; lean soil suits it better than rich soil.
Temperature
Hardy in cold winters; tolerates heat well, though exact limits are not in the sources.
How easy
Easy
Native range
C. & EC. U.S.A. to Mexico (Coahuila)
Climate
temperate
About
Oenothera macrocarpa (syn. Oenothera missouriensis), the bigfruit evening primrose, Ozark sundrops, Missouri evening primrose, or Missouri primrose, is a species of flowering plant in the evening primrose family Onagraceae, native to northeast Mexico and the south-central United States, where it is found in calcareous prairies and limestone outcrops.
Where it grows
Oenothera macrocarpa is native to Arkansas, Illinois, Kansas, Missouri, Nebraska, Oklahoma, Tennessee, Texas, and northeast Mexico. Habitats include limestone outcrops, glades, bluffs, rocky prairies, quarries, and roadsides.
Uses
The seed pods are often used in flower arrangements. This plant is also grown in gardens for its flowers. It is suitable as a groundcover in poor, stony soil which does not become waterlogged in winter, in full sun. It has gained the Royal Horticultural Society's Award of Garden Merit.
Text excerpted from the Wikipedia article Oenothera macrocarpa by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.