Wyatt from South Dakota writes
Hhow long do you wait to apply a post emergent such as Q4?
There is no time restriction after applying Crabgrass Control Plus 0 - 0 - 7 with 0.37% Prodiamine Herbicide for you to wait to apply a post emergent. You would want to apply a post whenever target weeds are actively growing and healthy.
Answer last updated on: 03/26/2019