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Pre-Emergent time - Best weapon for combatting CRABGRASS

crabgrass poa annua pre pre-emergent prodiamine weed prevention weeds

Pre-Emergent time - Best weapon for combatting CRABGRASS

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...

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