'Purple Showers' Mexican Petunia (Ruellia brittoniana 'Purple Showers'): Vigorous Bloomer

'Purple Showers' Ruellia: Nonstop Tubular Blooms for Warm Climates

Ruellia brittoniana 'Purple Showers' is a fast-growing, 3-foot-tall evergreen shrub (in frost-free zones) that produces wave after wave of tubular, petunia-like flowers in shades of blue-purple from spring to frost. Each flower lasts just one day, but the succession is continuous. Dark stems add contrast. Native to Mexico and the southwestern U.S., it thrives in heat and humidity.

Key Features & Uses

• Long bloom season: spring through frost
• Blue-purple tubular flowers on dark stems
• Evergreen in warm climates; grown as annual elsewhere
• Fast growth; may self-seed aggressively in ideal conditions
• Attracts butterflies
• Suitable for borders, containers, waterside plantings

Growing Requirements

• Light: Full sun to part shade
• Soil: Fertile, consistently moist but well-drained
• Water: Medium to wet; needs regular moisture
• Climate: Warm; Zone 8+ for perennial growth

Care & Propagation

Site in partial shade in hottest climates. Propagate by seed or softwood cuttings in spring. Self-sows aggressively where happy—deadhead to control spread.

Potential Issues

Generally pest/disease free. Aggressive self-seeding can be a nuisance in warm, moist climates.

Quick Reference

Height/Spread:	1–3 ft.
Bloom Time:	Spring to frost
Flower Color:	Blue, purple
Growth Rate:	Fast, potentially invasive
Uses:	Borders, containers, annual bedding, waterside