Euphorbia polychroma: An undemanding perennial, Euphorbia polychroma offers a pleasing contrast of colors on a neat, almost architectural form. It grows to about 15in and produces a splendid show in May from bright yellow bracts. Their color is long lasting, but changes to rose-bronze as they age above the green foliage. A sensational ground cover plant or accent in a sunny garden. Quite tolerant of hot, dry conditions (but not the heat and humidity of the South).
Baptisia sphaerocarpa 'Screaming Yellow', purple leafed Cottinus coggyria 'Velvet Cloak', deep blue Anchusa azurea, and Aquilegia chrysantha 'Denver Gold' are underplanted with grey leafed Crambe maritima on the Long Border.