Neon Sedum

About the Sedums: These perennial plants enjoy gritty, fast-draining soil, and must have full hot sun. They're really desert plants, so give them sharp drainage. (Sedums are often called Succulents, due to their thickened moisture-retentive leaves.)

Once Sedums are established, you've assured yourself of loads of perennial interest for the later months when most garden flowers are gone.