Ruellia brittoniana 'Katie Blue': Compact Desert Petunia for Small Spaces

Ruellia brittoniana 'Katie Blue' – Dwarf Mexican Petunia

Ruellia brittoniana 'Katie Blue', often sold as Desert Petunia, Florida Bluebells, or Mexican Petunia, is a dwarf cultivar prized for its compact habit and prolific violet-blue flowers. Unlike its taller, sometimes invasive relatives, 'Katie Blue' stays neatly mounded at 12–18 inches tall, making it perfect for containers, edging, and small garden beds. Its trumpet-shaped blooms appear continuously from late spring until frost, attracting hummingbirds and butterflies.

This heat-loving perennial thrives in full sun to part shade and tolerates a wide range of soils, including wet conditions. It is remarkably low-maintenance, deer-resistant, and drought-tolerant once established. In colder climates (zones 8 and below), it is often grown as an annual or overwintered indoors. 'Katie Blue' offers all the charm of the species without the aggressive spreading habit.

Plant Profile