I just found one of my 2 yr old Gala apples laying over on the ground this past weekend. I blamed it on deer until I got up to the tree and found that the wood stake I had tied to the tree had rotted off. I had heard that apple trees had real shallow roots and now I'm convinced that's true. The tree was hinged over flat on the ground with no apparently damage. (I'm hoping the tap root is not broken....) I replaced the wood stake with a fiberglass one. For one, it won't rot but also the fiberglass stake flexes and supposedly allows/forces the tree to develop stronger roots compared to a tree that is rigidly supported with a stiff wood stake. Sounds like it would work that way to me. Only time will tell as I'm replacing most of the wood stakes on my other trees too with fiberglass.
Anybody here got any thoughts or positive results of root strength improvement by using flexible fiberglass tree stakes?