The timing of pre- and post-emergent herbicide to your lawn is very important. Applying them too late or too early will basically be a waste of time, as well as wasting herbicide. So when to spray pre emergent herbicides? How They Work Pre emergent herbicides are an effective preventative for controlling weeds. Properly using a pre-emergent will establish a chemical barrier that will not kill … Continue reading When To Spray Pre Emergent Herbicides?