How to Recognise Euphorbia rigida

Euphorbia rigida is a choice evergreen Euphorbia with blue/green fleshy leaves arranged in spiralled whorls around the stem. It has a lax habit with several stems up to 2 feet long.
The flower buds are pink opening to an acid yellow in spring or early summer. This specimen was photographed in the new alpine house at the RHS garden Harlow Carr.

Euphorbia rigida Cultivation Tips

Euphorbia rigida prefers light, well-drained soil in full sun, but tolerates a wide variety of habitats.
Beth Chatto grows them in her ‘Dry Garden’ near Colchester.
Propagate from seed or by stem cuttings but let the cut surface to callous over before planting.
Euphorbia collections can be created to display a wide variety of textures and architectural features.
Euphorbia rigida blooms more reliably in poor soil.

Read more about top ten Euphorbia
Many plants are sold under the name Euphorbia rigida but all should have this spiky sort of appearance to the leaf.

Credits
Two images of Euphorbia rigida by Kew CC BY-NC-SA 2.0