Should I Mow Before Spraying Weed Killer?
Mowing right before spraying weed killer is usually not ideal because freshly cut weeds have less leaf surface to absorb the herbicide. In most cases, it is better to wait a few days after mowing before spraying, or to spray first and then wait the label-specified period before mowing. Always follow the product label, since different herbicides have different application and timing requirements.