: used or occurring in the stage between the emergence of a seedling and the maturity of a crop plant postemergence herbicides postemergence development.

What does pre and post emergent mean?

While pre-emergent herbicides work to prevent weeds from ever growing, post-emergent herbicides work on weeds that have already grown. They utilize a mixture of chemicals to kill the weed and ensure that it does not grow back.

When should you apply post emergent?

Post-emergent herbicides should be used once the spring season has gotten underway and you start to see weeds and plants growing. It’s too late at this point to use pre-emergents because the germination process has already begun. When you apply a post-emergent, it gets into the root system via the plant stalk.