Question: Why would half of a tree not leaf out? Mine is perfectly green on one side, brown on the other. Oh, and the bark on that side is falling off.
Answer: Half of all plant problems are not caused by disease or insects but rather environmental issues, which include weather and other situations you often cannot see. For example, a girdling root may have grown across the base of the tree instead of away from it, choking off the other roots on that side. Or a mechanical injury on one side of the tree may have injured the thin cambium layer just beneath the bark, which transports water and nutrients up and down the tree. All of the tree cut off above that cambium will die, much like a tourniquet left on a leg stops circulation. For other possible causes of your tree problem, see our website publication, HG 86: Common Abiotic Plant Problems.