I might have over-fertilized my hydrangea
I just planted 5 Dichroa febrifuga (evergreen), last weekend and now they are so wilted I'm afraid I've killed them. The same day I planted them, I fertilized them. I used the Tree & shrub miracle grow spikes...and drove two into their bed which is about 16 feet by 5 feet. They were very full and healthy looking for the first 2 days. Then I forgot to water them for 2 days and they were completely droopy/wilted. A few of the leaves have become mushy on the outer edges and are very dark. I have watered them for the past 2 days and they haven't perked up at all.
Did I over fertilize them? If I did, is there anything I can do to reverse the effect? Do you think they can pull through?