Propagation
Sow fresh seeds during spring in a well-drained media. The seeds require the standard peeling treatment prior to sowing.

Semi hardwood cuttings taken during winter and placed in a protected environment with bottom heat. 
Plant has been difficult to graft but has had some success on G. robusta and G.rosmarinifolia.

Botanic information
Leaf: The variable dark green leaves are obovate in outline up to 20 mm (¾ in) wide and are flat with serrated margins or dissected (sub-pinnatisect) into 8-24 linear lobes that are up to 20 mm (¾ in) long by 2 mm (2/16 in) wide. The petiole is short and the margins are revolute or recurved, enclosing the underside and the new growth is reddish.

Flower: The tubulate flowers have a pedestal up to 8 mm (¼ in) long and the oblong reddish-pink perianth segments are up to 12mm (½ in) in length with a protruding yellow pistil to 37 mm (1½ in) long with a with an oblique pollen presenter. The flowers are arranged in a spreading or curved terminal raceme that is up to 20 mm (¾ in) long by 40 mm (1⅝ in) wide. The flowers appear sporadically throughout the year but normally from spring to summer and are pollinated by birds.

Fruit: The almost spherical follicle is predominantly horned or ridged and is up to 11 mm (½ in) long by 8mm (¼ in) wide with a smooth reddish-brown pericarp. It contains a flat obovoid seed to 8mm (¼ in) long by 4 mm (⅛ in) wide with a wing at each end and the apical wing is oblique. The small seeds are viable but the plant is commonly reproduced vegetatively.