I planted my plum tree in the garden about 3 years ago (was in a pot for the first year). First year in the ground fruited lovely, last year fruit came we think the squirrels had the fruit as at night they where there gone in the morning (it wasn't the neighbor). This year the fruit has formed (still small) but all of a sudden the leaves half gone off half the tree. Pruned it last year for the first time blossomed lovely. Please help.