On Aug 26, 9:41*pm, "Keith Corwell" wrote:
I did some new seeding the first part of July. *The grass is up nice and I
did mow it once. *When could I spray some weed killer ?

I'd say after about 2 months you should be OK. However, I'd only do
it if really necessary. If you don't have a lot of weeds and they
are not interfering too much with the grass growing, I'd wait about
another month. Make sure when you do apply it that the grass is not
stressed, ie has enough water, temps are not high.