Garden Oracle / Drought and Heat Tolerant Gardening / Tucson - Phoenix - Arizona - California

Growing Ruellia peninsularis:
Desert Ruellia

social icons Facebook Pinterest Instagram

Form: Shrub.
Leaf retention: Evergreen to cold-deciduous.
Growth rate: Moderate.
Mature Size: 2-5' high and wide.
Flowers: Blue or purple, trumpet-shaped, 1" long and wide, five lobes.
Bloom: All year in regions without freezes. The largest bloom is in the spring.
Fruit: Small seeds.
Leaves: Green, downy, soft.
Stems: No thorns.
Wildlife: Attracts hummingbirds.
Toxic / Danger: No.
Origin: Mexico.

Cultivation and Uses
USDA hardiness zones: 9-11.
Heat tolerant: Yes.
Drought tolerant: Yes.
Sun: Full sun to part shade.
Water once established: Once or twice a month.
Soil: Well drained, pH 5.6-8.5 (acidic to alkaline).
Planting: Can be grown in large container.
Prune: After last frost to remove winter damage and to shape.
Litter: Low.
Propagation: Seed or cuttings / layering.
Uses: Ornamental.

This plant is a member of the Acanthus family (Acanthaceae) and is related to Mexican Honeysuckle. Other common names are Desert Petunia and Baja Ruellia. This species is non-invasive, unlike Ruellia brittoniana, a moderate water plant with long, glossy leaves.

Do you have additional information or a different experience for these plants that you would like to share? Email All contributions are welcome and appreciated.

Ruellia peninsularis: Desert Ruellia - flower

Ruellia peninsularis: Desert Ruellia shrub

Latest update: February, 2019
© 2008-2024 by