[yamini]

Garden centers often put perennials on clearance at the end of the season. Though the plants may look tired, they'll bounce back in spring. Annuals typically go on sale in early to midsummer and often put on good growth within a few weeks of planting.

Exception: Ornamental grasses. Buy young grasses early in the season and let them mature through the summer into the larger plants nurseries often sell at four times the cost.