i heavily watered (the leaves and roots) of 8 year old barberry shrubs in north texas heat at 108 degrees. shrubs get part sun,i w
atered in early evening when they were shaded. 24 hours later, the leaves curled up and leaves are brown. help! one week prior i applied a fungicide by scott’s to my lawn. some could have gotten on the barberry; but they looked fine until i top watered in the excessive heat. and all other shrubs are healthy. could the fungicide be the reason? or just my top watering in the heat?
Certified GKH Gardening Expert
What kind of fungicide was this? Sulfur fungicides tend to be a little less damaging to some trees and shrubs. Copper fungicides can kill trees if applied to heavily.
If this is an area where water naturally runs to, then it could have been over concentrated in that area. Why was the fungicide applied to the lawn? Did you see signs of infection? Applying copper fungicides for preventative maintenance is not recommended.