Landscape fabrics or fiber mulches reduce weed problems while allowing water to penetrate to the soil. Ideally, mulch the soil out to the DRIP LINE of the tree. The soil in most landscapes has been disturbed. It is often subsoil from excavation of the foundation. In a forest, leaves fall to the ground each year, returning nutrients to the soil.
Growth is much slower in a natural setting, resulting in lower nutrient needs.
Trees and shrubs often must compete with turfgrass for nutrients. Landscape trees and shrubs must be fertilized for optimal growth. Application should be in late October through early December or from February through May, while the plants are dormant. Frequency of application is dependent on soil conditions. Annual fertilization is recommended in poor soil, while every other or every third year is adequate in good soil.