Some plants have the one great aria, and others sing all year long. From the moment the red-flushed stems appear in the early spring to its final act as a torch of bright-yellow at the end of Autumn, Euphorbia griffithii is centre-stage. The stems and leaves are suffused with maroon and the flower heads are bright orange. It sends suckers running around the borders, but if you don’t like where it has popped up, just pull it out before it becomes established. The late Christopher Lloyd spotted this cultivar, which has redder stems than the species, in a batch of plants that came from Washfield Nursery in Kent. It grows to about 60cm tall and prefers well-drained soil.