Feeding Trees
30 Jan 2009
When trees grow naturally in the forest, the leaves fall around them, decay and form a good soil. The leaves also preserve moisture in the soil. On a lawn, however, the tree must compete with the grass for moisture and nutrients, and the leaves are raked up to prevent grass disorders, so that the successful gardener finds it wise to supply nutrients every two or three years.
Feeding should be done when the ground is workable, in the spring or in the fall.
A difficult but worthwhile method of feeding is to strip the sod from an area all around the tree extending at least 2 to 3 feet beyond the outer branches, since the root system extends this far. Apply stable or barnyard manure to this area, spreading it 3 inches thick and digging it in. Then firm the soil, rake it level and return the sod.
An easier method is to drill holes over the same area, 12 to 18 inches deep and spaced about 15 inches apart. Fill each hole with a commercial fertilizer (made up of bone meal, tankage, peat moss or humus) plus chemicals, in a formula containing 10% nitrogen,6% phosphoric acid and 4% potash. Many nurseries also provide stakes made from compressed fertilizer that you can drive into the ground around the tree.
