Missouri Evening Primrose (Oenothera macrocarpa (Oenothera missouriensis))-Hort Answers - University of Illinois Extension
University of Illinois Extension

University of Illinois Extension

Hort Answers

Wildflowers

Missouri Evening Primrose
Oenothera macrocarpa (Oenothera missouriensis)

Missouri Evening Primrose
Missouri Evening Primrose
 
Features

Large yellow flowers (3-4 inches in diameter) with four petals. Flowers ofpen late in the day. Large, 4-winged seed pod.

 
 
Culture
Full sun; moist soils with excellent drainage; drought tolerant. 
 
Mature Height
9-12 Inches
 
Native To:
Illinois
Missouri
 
USDA Hardiness Zone
3 - 7 
 
Bloom Color
Yellow
 
 
Bloom Season
June - August
 
Soil Conditions
Dry
Moist, Well-Drained
 
 
Exposure/Light Requirements
Full Sun
 
 
Pests and Problems

Environmental Damage


Additional pests and problems that may affect this plant:

No serious insect or disease problems, but root rot will occur in sites with poor drainage.

 
Additional Notes

Found in dry sites (rocky hillsides, prairies).