is there a certain length you would wait for to spray with 2-4D or would trimming back the weeds be a better idea? This is a relatively small area (1 acre) I could probably hit the weedy spots with a string trimmer if neededYes, just not too early in the growth stage. That situation poses a problem because you can't nail the broadleaf weed in their early stages. It'll work out, but the lack of rain is probably worse than the weeds.
Oh I have Mustard. I sprayed with Simazine just before green up. Going to mow Saturday.I put in switch .....Real World Wildlife's, Timber & Shawnee from Ernst......about 3 weeks ago.
As of today, I've seen no emergence of the switch (it was drilled so seedlings in-line would be my signal.)
I used Simazine and am generally pleased with its effectiveness. Have some volunteer buckwheat, surprisingly. Of all things.
My fear was marestail and mustard. But, thankfully they seem suppressed.