Jim from Vancouver, Wa. writes,
I live in the Pacific Northwest (Portland Oregon area). I just have my lawn hydro-seed last weekend (3/21/2015). I believe it was Fescue. Not sure which type, or if there is any other cool season grasses mixed in it. Can I use this now to prevent crab grass? And will this have any effect on Poa Annua?
According to the label for Tupersan Herbicide, it is recommended that the product can be applied after the onset of tillering and after the grass seedlings have developed an adequate secondary root system. Usually, five or six leaves of the grass seedlings are visible when the first tiller appears.
Answer last updated on: 03/26/2015