Posted: 11/06/2017 at 17:16
Even if you've applied it correctly, parts of the lawn will go black where the moss is being killed.
However, if you're sure you've over applied, give the lawn as much water as you can bear without turning it into glue, to dilute it. Then cross your fingers and wait.
You're not the first and you won't be the last ....... we'll cross our fingers for you.