Propagation
Sow fresh seed during spring and maintain a temperature of 16º to 18º C. (61º to 64º F). In cool climates and sow seeds in situ during early summer.

Botanic information
Leaf: The glossy dark green leaves are elliptical to narrow oval with an entire to serrated margin and are arranged in opposite pairs. The upper surface is prominently veined and may be slightly pubescent with a purplish tinge. When touched it omits a strong aroma.

Flower: The small 2-lipped tubulate flowers are arranged whorls of six in a long pubescent terminal spike that appears during midsummer.

Fruit: The small nuts contain viable tiny viable seeds.