Propagation
Sow fresh seed during spring in a well-drained media, and keep warm. Seeds may be difficult to germinate.

Semi-hardwood cuttings taken during early summer and apply bottom heat.

Botanic information
Leaf: The oblong to elliptical, leaves are up to 70 mm (2⅔ in) wide with undulating margins that may be finally toothed and the apex is acute. They may be arranged oppositely or more commonly in a whorl of three with a purplish petiole up to 38 mm (1½in) long. The upper surface is glossy dark green and the underside is dull green.

Flower: The tiny creamy-white tubulate flowers have 4-petals and sepals with protruding stamens. They are arranged in a large branched cymose panicle that is terminal or axillary, appearing towards the end of the branches during summer.

Fruit: The ovoid glabrous capsule protrudes slightly from the persistent calyx and opens with 4-lobes and contains numerous tiny seeds. The seeds are dispersed by wind or on the bodies of birds and are viable but the plant may be reproduced vegetatively.