Answer: Many plants go through an adjustment period after being transplanted. It isn't unusual for them to wilt, develop yellow leaves, and drop flower buds during the stressful few weeks after being transplanted. Hydrangea tends to droop in the afternoon sunshine, but usually recovers overnight. There's not much you can do to help your plants become established except to exercise some patience and make sure they get adequate water on a regular basis. Water your plants deeply once each week, applying water slowly so it has a chance to trickle down and wet the entire root mass. I'm sure your hydrangeas will perk up soon.
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