Billy from Sterling, Va writes
I've been trying to battle crabgrass forever. I've made three applications of the Hi-Yield crabgrass weed control since March 1st..and as well over-sprayed with the 2EW product. .25 oz. to 1 gallon. So far, I'm seeing little results and the crabgrass is thriving. What do I do? The temps are in the 80's now. Is there any hope at this point?
The Hi-Yield Crabgrass Weed Control and Dimension 2EW are primarly pre-emergent herbicides and will not control existing crabgrass. Dimension 2EW will have early post-emergent control of crabgrass, but only until about the second-tiller leaf stage. For better post-emergent control of crabgrass, we would suggest using Quinkill Max, which contains quinclorac. Quinclorac is the most popular post-emergent herbicide for crabgrass on cool-season turf. Be sure to use a surfactant such as Prime Source Duo Stick with QuinKill Max. This surfactant greatly helps reduce surface tension of applications to maximize absorption of the herbicide into the target plants. Post-emergents will work best on young, actively growing plants.
Answer last updated on: 06/08/2016
