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Nature's clock will tell you when to spray for crabgrass
Nature's clock will tell you when to spray for crabgrass

With all the wacky weather in Maryland this winter, when will be the right time to apply crabgrass pre-emergent [herbicide] this spring? Application dates are based on when crabgrass seed "normally" germinates, but this may be a prime year to rely on what plants tell us in real time. The rule of thumb based on nature's timing is to apply a pre-emergent herbicide for crabgrass when forsythia drop their blooms. In average years, crabgrass seeds germinate after March 15 on the Eastern Shore, April 1 in Central Maryland and Washington, and late April west of Hagerstown. We have a worst-case yard scenario with our active dog. The trees are big, though some afternoon sun...

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