Ground covering enhances the appearance of flower beds while controlling weed growth and preserving the soil’s freshness. Gro-Bark’s Mulch can be used with a variety of plants including trees, shrubs and perennials and in a variety of applications including garden beds and containers. If using Mulch for weed control, it should be applied at least 4” deep, but away from the trunk or base of the plant, to be effective. In subsequent years, you just need to top up with an inch or two.