Ornamental grasses are low maintenance plants that usually have a clump forming habit and can return year after year. Make sure to check that the grass you select grows in your zone. They are beautiful planted in masses or along borders and do well in cold climates. Ornamental grasses provide texture, movement and habitat to your garden. We leave our grasses throughout winter to provide winter interest, shelter and also protection to the plant from harsh colds. Prune back your grass right before spring to make way for all the new growth for the seasons ahead.