Hydrangea Flower Edges Turning Brown. Just clip off those brown flowers. If the margins of the leaves fade from green to grey and then turn brown the plants were dry for too long.
Although some afternoon sunlight promotes blooms too much sunlight when coupled with wet leaves. They are planted against a south facing wall. 24082015 Yes its probably the heat.
The plant could also be in shock or reacting to the weather turning colder.
What did you do. Some hydrangea leaves turning yellow and dry due to too much direct sun. Similarly if you water deeply but then skip a week or two the flowers will droop and brown in between drenchings. Too much sun exposure can cause your hydrangea shrubs to burn on its leaves and blooms.