Precast concrete flower bed edging stones are easy to install. Lay out the shape of the bed with a rope or garden hose, then use a flat-blade spade to make a trench.

Cover the area with a layer of clear plastic sheeting. The heat from sunlight will kill the grass ... Physical Methods to Prevent Grass from Creeping into Flower Beds Adding edging or a physical ...

Then edge the bed and manage the weeds. You can cover the bed with clear plastic for 6 to 8 weeks during the hottest part of the growing season for non-chemical control of weeds.