Oak tree leaves are all brown
I've posted before on this cantankerous tree. We planted it in fall and lost all it's leaves about a month later, my guess is due to shock, but sprouted leaves in spring and it was looking good. My husband did a little trimming around April and now all the leaves are brown (although they haven't fallen off). We're watering for a couple of hours once a week using a sprinkler. Am I not watering enough? or did the trim send it back into shock?