Propagation
Surface sow fresh seeds when ripe (early spring) in a well-drained media, and maintain a temperature of 19º to 24º C. (66º to 77º F). Germination takes from 1 to 3 months. Prick out and pot up when they are large enough to handle and plant out after all risk of frost has passed.

Division of offsets in early spring and place in a moist sandy media until roots appear.

Note:
Care should be taken when handling the plant as it may cause skin irritation or allergic reaction and the seeds are poisonous if ingested.

Botanic information
Leaf: The elliptical to oblanceolate leaves are up to 100 mm (4 in) wide with a winged-petiole up to 90 mm (3½ in) long and an irregular dentate margin and an obtuse apex. The thin textured leaves have a crinkly bright green upper surface with a pale green midrib and 15 pairs of slightly ascending veins.

Flower: The salverform flowers have a campanulate calyx that is white or cream with a triangular lobes and a slender pedestal to 20 mm (¾ in) long. The rose-purple corolla has a red or purple centre with spreading obovate lobes that are deeply emarginate. There are 4-12 flowers arranged in a whorled-umbel in tiers high above the foliage on a whitish scape that is up to 500 mm (20 in) tall and appear from late spring to early summer. 

Fruit: The small globose capsule has 5-10 valves and releases numerous tiny seeds that are viable but the plant is commonly reproduced vegetatively to maintain true to type.