Q.rhododendron wilting
We have new rhododendrons that are wilting. Gardener says it’s fusarium and we should water less and only in the early morning. Does this sound right?
I would remove any dead or diseased material and dispose of.
You can treat the plants with a copper sulfite fungicide.
Avoid splashing water onto the plant.
Here are some links that will give more care information.
https://www.gardeningknowhow.com/ornamental/shrubs/rhododendron/rhododendron-care.htm
https://www.gardeningknowhow.com/ornamental/shrubs/rhododendron/issues-with-rhododendrons.htm
https://www.gardeningknowhow.com/plant-problems/disease/controlling-fusarium-wilt.htm