Mexican Oregano (Poliomintha longiflora): Drought-Tolerant Herb with Lavender Flowers

Overview

Mexican oregano (Poliomintha longiflora), also called rosemary mint, is a woody, evergreen subshrub native to northern Mexico and Texas. Its aromatic leaves have a strong oregano flavor with hints of citrus and licorice, while its lavender-pink flowers attract hummingbirds and butterflies.

Botanical Description

Compact, rounded shrub 60–90 cm tall and wide. Leaves are small, linear, 1–2 cm long, gray-green, highly aromatic. Flowers are tubular, 2–3 cm long, lavender-pink with a white throat, borne in loose spikes from spring to fall, heaviest after rains.

Taxonomy

Family:	Lamiaceae (lay-mee-AY-see-ee)
Genus:	Poliomintha (po-lee-oh-MIN-tha)
Species:	longiflora (lon-jee-FLO-ruh)

Growing Conditions

• Light: Full sun.
• Soil: Well-drained, alkaline, gritty; thrives in limestone soils.
• Water: Very low; extremely drought-tolerant.
• Hardiness: USDA zones 8–10; may die back in zone 7 but resprout.

Uses

Culinary: Leaves fresh or dried for Mexican, Tex-Mex, and Southwestern dishes. Stronger than Mediterranean oregano—use less. Ornamental: Xeriscape, rock garden, hummingbird garden. Wildlife: Nectar source for hummingbirds, butterflies, bees.

Notes

Not a true oregano (Origanum) but used similarly. The genus name means "many mints." Deer resistant. Prune lightly after flowering to maintain shape.