Evolvulus spreads low and wide in full sun, reaching just a few inches tall but spreading a foot or so across—perfect for hanging baskets, rock gardens, or the front edge of a bed where you want color without height. The delicate blue flowers appear all summer and keep coming as long as the heat does.

Plant it in well-drained soil and let the sun do the work; it asks little else. You'll find it in quart pots at the garden centre March through October.