Q.Berberis Dropping Leaves
We have a Berberis which up to three weeks ago was very healthy. Now the leaves have started to drop off. We had a previous problem with sawfly. That was a couple of years ago. The only thing I have done is watered it due to the hot weather.
Certified GKH Gardening Expert
I'm afraid that overwatering is likely the culprit here.
They will only need water once the soil has dried significantly. The soil should be very dry, completely, down to about 5 or 6 inches or so before the shrub will need extra water.
I would recommend light pruning, and a fungicide.
These articles will help:
https://www.gardeningknowhow.com/ornamental/shrubs/barberry/barberry-shrub-care-tips.htm
https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm
https://www.gardeningknowhow.com/garden-how-to/info/homemade-fungicide.htm
