News — pre
Pre-Emergent time - Best weapon for combatting CRABGRASS
crabgrass poa annua pre pre-emergent prodiamine weed prevention weeds

Some of you in the deep south are already in the window to apply your pre-emergent, the rest of us are on the cusp or are just outside the window. Get your Pre-emergent herbicide down when your 5 day soil temp average is about 50 degrees and climbing. Weed seed begins to germinate around the 55 degree mark. How a pre-emergent works: Once applied and it has been watered in (rain or irrigation), the herbicide forms a "barrier" that will prune off new root growth from newly sprouted seedlings. How much do I apply and how long it works...