Credit: elenaleonova / Getty ImagesKey PointsManual removal of grass from flower beds is best done after a rain.Mulching, groundcovers, and edging prevent grass from growing in flower beds.Treat annual grass weeds with pre-emergent herbicides in late winter or early spring.Flower beds are a beautiful addition to any yard, but some grasses will creep in and try to take over the space. Without proper grass management, some of them succeed.Here is …