Post-Emergent Herbicides FAQ
What is a post-emergent herbicide?
A post-emergent herbicide kills weeds that have already germinated and are actively growing, unlike pre-emergents that prevent seeds from establishing. Post-emergents are what you reach for when weeds are already visible. They come in liquid and granular forms and in selective and non-selective types, matched to the weeds and the surrounding plants.
What is the difference between granular and liquid post-emergent herbicides?
Granular post-emergents are spread dry and often work best applied to moist foliage so the product adheres, suiting broadcast application over turf. Liquid post-emergents are sprayed for direct, even coverage and faster uptake. Granular suits whole-lawn treatment with a spreader; liquid suits spot treatment and precise coverage. The choice depends on scale and precision.
What is the difference between selective and non-selective post-emergents?
Selective post-emergents kill target weeds while sparing desirable turf, which is what lawn weed control requires. Non-selective products kill all vegetation they contact, for spot treatment, edges, and clearing. Applying a non-selective product over a lawn kills the grass too, so selective products are the standard for treating weeds within turf.
When should I apply post-emergent herbicide?
Apply when weeds are young and actively growing, since small, growing weeds take up and respond to the herbicide best, while mature weeds are harder to control. Avoid applying in drought stress or extreme heat, which reduces uptake and can stress turf. Timing the application to actively growing weeds is what makes post-emergent control effective.
How do I get the best results from a post-emergent application?
Apply at the labeled rate to actively growing weeds under good conditions, ensure thorough coverage, and follow any guidance on rain-free intervals so the product is not washed off before uptake. For granular products, applying to moist foliage helps adhesion. Following the label on rate, timing, and conditions is what separates effective control from a wasted application.
Can post-emergent herbicides be ordered in bulk?
Yes. Post-emergent herbicides, both granular and liquid, are stocked in commercial quantities with volume pricing by quote. Operations running weed control programs benefit from having the right selective and non-selective products on hand for prompt treatment, applied according to the label, across their route.
