Tips

When they're not in flower, perennials are enjoyed for their foliage, which is at least as important a consideration as the blooms.

Perennials may grow and expand each year, eventually filling more space than you might expect. To keep perennials under control and growing well, many need division (digging up the root clump, dividing it into sections, and replanting the best sections in freshened soil). This can provide a harvest of new plants for use elsewhere in the garden