Desert Ruellia (Ruellia peninsularis): Drought-Tolerant Native Shrub

Desert Ruellia: A Tough, Floriferous Shrub for Arid Landscapes

Native to southern California, Ruellia peninsularis is a dense, rounded shrub to 4 feet tall and 6 feet wide, clothed in small, glossy green leaves. From late spring through early summer (with sporadic rebloom), it produces abundant purple, petunia-like flowers. This desert-adapted species thrives in heat, sun, and drought.

Desert Garden Star

• Dense, glossy foliage; naturally tidy habit
• Purple petunia-like flowers over long season
• Extremely drought tolerant once established
• Full sun and well-drained soil required
• Hardy to Zone 9; in colder zones, prune winter damage in early spring

Care & Propagation

• Soil: Well-drained; prefers lean, alkaline conditions
• Water: Dry to medium; very drought tolerant
• Propagation: Seed in spring; root cuttings in spring/early summer
• Maintenance: Moderate; prune frost damage in spring

Potential Issues

Leaf spots, rusts, root rots in wet conditions.

Quick Reference

Height:	3–6 ft.
Spread:	3–6 ft.
Bloom Time:	Late spring, early summer (sporadic all season)
Flower Color:	Purple
Uses:	Desert gardens, native plantings, spring interest, xeriscaping