Propagation
Sow fresh seed during autumn in containers.

Divide established clumps in spring or autumn. 

Note:
Contact with the milky sap may cause skin and eye irritation.

Botanic information
Leaf: The mid-green leaves are narrow-lanceolate to linear with slightly recurved margins that are undulating. The apex is acuminate and base is sessile. The underside is pale green with a prominent mid rib and immature leaves are tinged purple.

Flower: The tiny apetalous flowers have no perianth segments and are arranged in a terminal cyme that is up to 12mm (5in) tall. The cymes are cupped by an involucre of greenish fused bracts and have red nectar glands. They appear during spring.

Fruit: The 3-valve capsule is an explosive schizocarp and contains the numerous seeds. The small seeds are viable but the plant is commonly reproduced vegetatively to maintain true to type.