Propagation
Sow fresh seeds during late winter to early spring in containers and place a cold frame to germinate.  
Basal cuttings taken during spring.
May be difficult to transplant when large as roots disliked disturbance.

Note
Contact with the milky sap may cause skin irritation, wear gloves when handling.

Botanic information
Leaf: The leaves are linear to narrow lanceolate with a short petiole and an acuminate apex. The margins are commonly recurved upwards and the leaves are arranged in whorls of 3-5.

Flower: The rotate flowers have a long slender pedestal with 5-sepals and 5-reflexed purplish pink ovate petals. The 5-pendant whitish hood-shaped lobes are attached to the pistil head on a short stalk. The flowers are arranged in a terminal umbel-like cyme that is up to 80 mm (3⅛ in) wide and appear above the foliage on a greenish scape throughout summer.

Note
The hermaphrodite flowers are pollinated by bees, insects and butterflies (Lepidoptera).  The flowers have 5-stamens and the pistil has a superior ovary.

Fruit: The erect narrowly ovoid smooth follicles contain numerous small flat seeds with tufts of silky hair. The small seeds are viable but the plant may be reproduced vegetatively.