We have a columnar maple, 3yrs. This year the leave have arrived but are all limp and I think I see sign of them beginning to brown. A ornimetal pear tree beside it is also full of leaves but has failed to flower like others in other parts of the yard. We are 1 1/2 hours from Bufflo NY at the west end of lake Ontario. the ground is well drained. and it has been a dry spring. I worry about over watering. Any thoughts?