The beautiful, burgundy-leaved Euphorbia dulcis does self sow, but the seedlings can be easily removed (and given to appreciative visitors). I also like Euphorbia polychroma (shown at right), which is a dome of chrome yellow in late spring. In zones 5 and warmer, try Euphorbia polychroma ‘Bonfire’, which has three seasons of color. There’s also a new introduction called Jessie, which grows up to 4 feet tall.
