Cushion Spurge is stunning when in bloom, producing cymes of sulfur yellow bracts at the tips of the stems in April and May. The green foliage is neat and completely pest free, since all Euphorbs have toxic sap that no animal eats. Euphorbia polychroma’s habit is cushion or dome shaped, particularly in full sun. It forms a taproot which helps it handle drought and rocky soils well. The fall color is attractive shades of red. Prune spent flower heads to discourage self-seeding.