Endless Bloom Perennial Garden: Non-stop flowers from spring through fall. April brings pretty Primroses, followed all summer by a host of colorful favorites, and ending with cushion mums at frost. A professionally designed garden like this would cost hundreds of dollars at a retail store. This 25 x 8 garden includes 54 flowers that take just a few hours to plant and return bigger every year. Prefers sun or partial shade.