Hints and Tips Time to cut back the ornamental grasses and divide them if  necessary.  Most perennials can be divided in the spring, but wait to split early bloomers such as columbine until after they flower.  Do your tall sedums tend to flop after a late summer rain? Give them a haircut in spring . They'll be a bit shorter but will have less tendency to fall. Home About Us Garden Design Featured Plants Hints & Tips Contact Us