Wild Petunia (Ruellia humilis)-Hort Answers - University of Illinois Extension
University of Illinois Extension

University of Illinois Extension

Hort Answers

Wildflowers

Wild Petunia
Ruellia humilis

Wild Petunia
Wild Petunia
 
Features

Light purple, petunia-like flowers (each flower is open for only one day).

 
 
Culture

Full sun to partial shade; moist, well drained soils. Tolerates some dryness.

 
 
Mature Height
8-12 Inches
 
Native To:
Illinois
Indiana
Iowa
Michigan
Missouri
Ohio
Wisconsin
 
USDA Hardiness Zone
4 - 8 
 
Bloom Color
Lavender
 
 
Bloom Season
June - September
 
Soil Conditions
Dry
Moist, Well-Drained
 
 
Exposure/Light Requirements
Full Sun
Partial Sun/Shade
 
 
Pests and Problems

Environmental Damage


Additional pests and problems that may affect this plant:

No serious insect or disease problems.

 
Additional Notes
Found in prairies and open woods. Self sows. Listed as threatened in Michigan and endangered in Wisconsin.