Fertilizing Trees Trees in the wild don't need fertilizing, so why should yours? Because they might be, not only under nourished, but under stress. Your trees don`t get the rich nutrients the woods floor provides. They also have to compete for whatever nutrients are available in the soil, agents the lawn and other plantings. Apart from poor soil, there could be other stresses, improper Ph, too little water, too much water or environmental pollution. Robby's Lawn Service, P.O. Box 3653, Tallahassee, FL, 32315, USA Phone: 1-850-544-0400   E-Mail: comments@robbyslawnworks.com