Q.Why Is My Hydrangea Wilting?
My hydrangea was thriving until moved to a larger pot,exposed to much sun with minimal watering as it was away and then flooding due to poor drainage in the pot. It is now looking very droopy, with brown/ red leaves the are glossy. I’ve checked the roots for root rot but they look fine.
Certified GKH Gardening Expert
It looks like too much sun, and too much water! Most Hydrangeas will require some shade. Be sure to allow the soil to dry out down to about 3 or 4 inches between waterings. This can help prevent issues with stagnation.
For a refresher on the general care requirements for these shrubs, please refer to this collection of articles:
https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea