Moderate water for lush growth and abundant blooms. Water deeply, then allow the upper soil to dry; established plants tolerate brief drought. Increase watering during extreme summer heat as needed.
Size
3-5 ft tall × 2-3 ft wide
Habit
Perennial clump
Toxicity
Not Established
Description
A heat-tolerant perennial commonly called purple Mexican petunia, with slender, lance-shaped leaves and abundant trumpet-shaped flowers. Ruellia brittoniana is now generally classified as Ruellia simplex.
Autumn sage, Lantana, Society garlic, Yellow Bells
Not Established
Not established — verify
Care Instructions
Light: Full sun to partial shade; afternoon shade can reduce heat stress in Phoenix summers. Best flowering with several hours of direct sun.
Water: Moderate water for lush growth and abundant blooms. Water deeply, then allow the upper soil to dry; established plants tolerate brief drought. Increase watering during extreme summer heat as needed.
Soil: Adaptable to sandy, loamy, or clay soils, including alkaline Phoenix soils; well-drained soil is preferred.
Mature size: Typically 3–4 feet tall and 2–3 feet wide initially; spreading roots can form much wider colonies.
Bloom: Spring through fall, often continuing into early winter in warm, frost-protected locations. Individual flowers last one day, with new flowers opening regularly.
Evergreen / deciduous: Evergreen to semi-evergreen in mild winters; frost may kill foliage and stems, followed by spring regrowth from established roots.