Lippia dulcis (Aztec Sweet Herb) 9 cm pot

Growth habit & appearance: Lippia dulcis forms a low, spreading mat of soft green foliage with a distinctive warm, resinous fragrance. The leaves contain hernandulcin, a natural compound far sweeter than sugar, giving the plant its strikingly sweet taste. Small white flower clusters appear in warm weather, adding ornamental value to this compact, subtropical species.

Growing conditions: As a tender perennial, it requires heat and protection in Ireland and is best overwintered indoors or in a warm polytunnel. In summer it can be placed outdoors once night temperatures remain consistently mild. It prefers full sun, free-draining soil, and shelter from wind. In cooler counties, growth is slower, and plants benefit from bottom warmth and bright indoor light during winter months.

Traditional & herbal uses: Today Lippia dulcis is primarily appreciated as a natural sweetener for herbal teas, where only a small amount is needed due to its intense sweetness. It is also occasionally used in contemporary herbal practice as a mild aromatic herb for soothing upper-respiratory congestion. Its camphor content means it is used sparingly, chiefly as a flavouring and aromatic adjunct rather than a core herbal extract.

Maintenance & harvesting: Pinch out growing tips through summer to maintain a compact shape and encourage fresh leaf production. Take small rooted sections for propagating and to ensure backup plants for overwintering. Harvest leaves lightly during warm months, avoiding over-stripping any young plant. Overwinter indoors in a bright, frost-free space, keeping watering minimal to prevent root issues. Move outside only during settled warm weather.