Nicholas from Manchester, Michigan writes
Opti Amine 2,4-D Amine Herbicide is a post-emergent herbicide for broadleaf weeds that will not provide pre-emergent control for crabgrass or any other weeds. For the best crabgrass control, you want to apply a pre-emergent in the spring. Please visit our pre emergent crabgrass control page.
Answer last updated on: 04/09/2019