A friend has a Rock Daphne which bloomed profusely this spring. When I stopped by to see her today, all the leaves were withered and falling off. The shrub is in an area with ample shade, receives proper watering several times a week. I did notice the limbs of the shrub had a lot of small black nodes throughout the entire shrub. Is it possible this is some kind of scale? Any of possible culprits? Possible solutions? Thank you.
Certified GKH Gardening Expert
It sounds like a pest of some kind or even a fungus is attacking the shrub. I would try treating it with Neem oil spray, which will help with both insect pests and fungus. Here is more information: https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm