Tea for Trees

If you are not thinking in terms of planting more plants, and knowing your landscape I don't think you are, I'd rake some compost and Yum-Yum mix into the soil (1" deep), and then I'd be sure that the tree has plenty (3" thick) of mulch . Finally, I'd drench it with compost tea as per the page below... .... Melissa also recommends "Great Garden Formulas" which quotes Bob Pennington.