I am sorry for this delayed reply to your gardening question. We are transitioning to a new Q&A system and your question was unfortunately lost in the transition. I have discovered it now and hope this reply is not too late to be of help.
That product will not harm the turf if applied at the proper rate which is about 7 pounds per 1000 square feet. The rains should have dissolved it and washed it in well, perhaps too well so as to wash some away. Nevertheless within a week or two after application you should start to see results. But the response will increase for another few weeks after that.
You can cut it at any time. The more often you mow the better.
Thanks for the question. Please stop in again soon!
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