Aztec Sweet Herb (Lippia dulcis): Natural Sweetener with Ancient Heritage

Botanical Profile

Family: Verbenaceae (ver-be-NAY-see-ee)
Genus: Lippia (LIP-pee-uh)
Species: dulcis (DUL-sis)
Synonyms: Phyla dulcis, Phyla scaberrima

Description

Aztec sweet herb is a low, creeping perennial (often grown as an annual in cooler climates) with small, oval, toothed leaves on trailing stems. The foliage emits an intensely sweet, herbal aroma when crushed—due to hernandulcin, a sesquiterpene compound estimated to be 1,000 times sweeter than sucrose. Tiny white flowers cluster in small heads at leaf axils from summer to frost.

Cultivation

Native to Mexico, Central America, and the Caribbean. Grow in full sun to partial shade with well-drained soil. Drought tolerant once established. In zones 9–11, it's a perennial groundcover; elsewhere, treat as a tender annual or overwinter indoors. Spreads by rooting at nodes; can be grown in hanging baskets or as a spiller in mixed containers.

Historical & Modern Uses

Used by the Aztecs as a sweetener and medicinal herb (called tzopelic-xihuitl). The leaves can be used fresh or dried to sweeten teas, desserts, and fruit dishes. A natural, zero-calorie sweetener alternative. Traditional uses include respiratory ailments, digestive issues, and as a general tonic. Note: High doses may have camphor-like toxicity; use in moderation.

Garden Value

Unique conversation plant for herb gardens and educational collections. Attracts small pollinators. Deer resistant.