After planting your trees, shrubs and flowers, spread mulch at a depth of about 2-4”. Use less for heavy clay soils and more for lighter sandy soils. No need to pile or hill around the base of trees and shrubs. In fact, this may create the perfect hideaway for rodents! Mulching before the late spring growing season will help with moisture retention and weed suppression. A fall application creates protection for bulbs and perennials. As mulch breaks down into your soil, be sure to replenish as required. However, sometimes a light rake is all you need to do to refresh its look!