How do I stop the white Oak Leaf Hydrangea flowers from turning brown?

Take pics and leaf samples to you local nursery to get more information for your area and project. I'm sure they can help.you best.

If the margins of the leaves fade from green to grey and then turn brown, the plantswere dry for too long. If the petals of the flowers turn brown at the tip, not enough water was applied. Both the leaves and the flowers will show lack of water very quickly.All hydrangeas will turn brown if they wilt too many times in hot weather. Water these shrubs deeply every few days in the heat of the summer (note that hand watering isn't deep enough) and mulch around plants to hold moisture in the soil longer

Hi Mike!

Nashville is a great place! I know your weather is very hot there, and that is always a key factor for growing well. Thank you for asking Hometalk your question.

https://www.hometalk.com/diy/grow/flowers/q-how-do-i-stop-the-white-oak-leaf-hydrangea-flowers-from-turning-brown-43328073

https://www.bing.com/videos/search?q=How+do+I+stop+the+white+Oak+Leaf+Hydrangea+flowers+from+turning+brown%3f&qpvt=How+do+I+stop+the+white+Oak+Leaf+Hydrangea+flowers+from+turning+brown%3f&FORM=VDRE