Ruellia needs a warm climate. Site in partial shade and fertile, consistently moist, but well-drained soil.
- Light Needs: Partial to full sun
- Watering Needs: Once established, needs only occasional watering
- Care Difficulty: Easy Care Plant
This three-foot-tall evergreen shrub bears many tubular, blue or purple, petunia-like flowers on dark stems over a long period. Each flower lasts for just one day. It is a fast grower that may self-seed aggressively. Use in a border, container, or at waterside. Can be grown as an annual in cooler areas.