After 10 years and 4 years of beautiful bloom and good growth, my wisteria died. It was spring there was abundant buds comming and then they stopped growing and it died. I noticed holes near it. I think possibly from moles. Could this be the cause. It is planted in a well drained area. In fertile soil, no lime. This happened 3 years ago. I have since planted a huney suckle in that spot and it is doing great so far. I have another wisteria planted in a different spont that has bloomed every year but is not growing and I do not prune it. My dog and neighbour dogs were using it as a teretorial marker so I put a plastic bearier around it. Does dog pee actually hurt the tree. What is happening. I don't want to lose anther one.