Answer: Hydrangeas as a rule require an evenly moist soil (but not sopping wet) and if kept too dry will show browned and dry foliage. Failure to root properly would inhibit them from absorbing moisture, too. These plants also normally turn brown and lose their leaves in the fall. There is not much you can do this late in the season except mulch around them and hope they leaf out next spring. I'm sorry I can't be more helpful.
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