Propagation
Take stem cuttings from spring to summer. Cuttings should be soaked in water until the sap stopped oozing then plant into a very well-drained gritty media and keep moist.
Division of an established clump during spring.

Note:
Care should be taken when selecting a site as all Euphorbia's contain white sap that causes skin and eye irritation. Be certain to wash your hands with soap and water after handling plant material.

Botanic information
Leaf: The sesile silver-green elliptical to oblanceolate leaves are up to 100 mm (4 in) long by 25 mm (1 in) wide. The upper surface is glaucous and the apex is obtuse. They are crowded alternatly towards the end of the reddish stems.

Flower: The male and female flowers are arranged in a cup-shaped involucre-like organ (cyathia) that has reddish bracts. The male flower has a single stamen and the female consists of a 3-celled pistil. There are 5-6 flowers are arranged in a open terminal cyme and  the individual cyathia are partially hidden by the broader subfloral leaves. The flowers appear from early spring to late summer and sporadically throughout the year.

Fruit: The 3-valve greyish-brown globose capsule is an explosive schizocarp and contains numerous smooth seeds that are up to 3 mm (⅛ in) long and are viable but the plant is commonly reproduced vegetatively to maintain true to type.

Note:
Euphorbia glauca is under threat in its native habitat from domestic and feral cattle, sheep, and pigs from trampling.  Rabbit also reduce the plant to almost nothing and require protection. Coastal development and subsequent erosion has also played a big part in the decline of the species.