I used Copperas when I planted my hydrangeas yesterday. Today, I have some burn spots on some of the leaves. What can I do? Have I killed my plants?
Certified GKH Gardening Expert
Since they were newly planted, it may have burned the tender roots. You can try flushing the soil with water to dilute it and lessen the damage. But other than this, there's little you can do. Newly planted shrubs/trees/flowers should be fertilized at 1/2 strength to avoid issues like this.