How late in the spring can I seed my lawn?
Pre emergent weed killer must be timed to be applied when the weeds seeds are germinating. Now is a good time usually (early April), however, this year spring is progressing earlier than usual and it may be too late. Pre emergent weed killer is not selective and will work against many plants including grass. It is not a good idea to reseed grass when the pre emergent killer has or will be applied. Reseed grass in early fall.