Propagation
Take soft tip or semi hardwood cuttings during summer and autumn.

Take hardwood cuttings in late winter. 
Graft Hawaiian cultivars onto an ordinary rootstock.

Botanic information
Leaf: The broad variable ovate leaves up to 120mm (4¾in) wide and the margin is crenate, dentate to entire. The apex is acute and the petiole is short.

Flower: The funnelform flowers are arranged solitary or in a terminal spike and have 5-overlapping petals with a central column of fused stamens. There are no blue and mauve coloured flowers and they appear throughout summer.

Fruit: It has a small woody capsule that contains numerous seeds. The small seed is not commonly seen and the plant is normally reproduced vegetatively to maintain true to type.