Answer: Unfortunately, based on your description it is difficult to tell exactly what the problem may be, but you should try to figure out the cause immediately. Overwatering and underwatering can cause problems, as can improper planting technique. There can also be a situation where the soil in the rootball is very different from the surrounding soil thus causing a variety of things to happen, or perhaps an unseen problem such as irrigation system failure. You might want to be a detective of sorts and dig down a bit and see if the soil is very wet or very dry, you might want to consult with the landscaping company or nursery that supplied the trees, you might also want to consult with a professional arborist or your local County Extension (722-7721) .
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