Answer: Willows thrive on water and are often found growing naturally near streams and ponds. Your willow is undoubtedly still trying to adjust to being transplanted in addition to suffering from the extreme heat. The symptoms of water stress include drying leaves and dieback of stems. If the tree is otherwise healthy, it will probably recover. You can help things along by watering once each week, thoroughly wetting the entire root system. Don't prune or fertilize at this time. Next spring you can cut back the dead stems and branches and the plant should respond by producing new shoots and leaves.
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