Does anyone make a slow-release fertilizer spike that is 15-5-15?
My first reaction was that if your lawn is being burned, you’re using too much fertilizer or you’re not applying it according to manufacturer’s instructions. I consulted David Marshall, the University of Florida/IFAS horticultural agent for Leon County, and he agreed. “If the granular fertilizer is burning the grass, it is either being put out at too high a rate, or is not being watered in properly with a quarter-inch of water after application. Tree roots are widely spread beneath a tree and can run out into the lawn and other areas as far as three to four times the branch spread of the tree. For example, a small tree with branches that extend out 10 feet from the trunk may easily have roots running out 30 feet from the trunk,” he said. “Therefore, spreading the proper rate of granular fertilizer over 900 square feet, or a 30- by 30-foot area, would do a much better job of distributing the fertilizer to the tree roots than merely putting in a few fertilizer spikes,” he recommended. As
