I planted a Weeping Willow that was a good 10-12' tall but was grown in a 7 gallon container. The plant was the picture of health when planted and now ( 3 weeks later) the leaves at the top of the tree are a bit wilted and crunchy. We have been drip watering for 30 minutes 3 times a week in addition to our regular sprinkler system. Should we increase the watering or decrease the watering?