Source: MORNING AG CLIPS, 2/21/18

Mid-February, Early March is the time to apply pre-emergent herbicides to lawns in southeastern North Carolina. These products are usually applied as a granular and then watered in to the lawn. If your summer lawn is typically weedy, applying a pre-emergent now could help reduce summer weeds, depending on the type of weeds you have and the health of your lawn.
Pre-emergent herbicide products, often sold as crabgrass preventers, are effective for controlling summer annual grassy weeds such as crabgrass, sandbur, and goosegrass, but do not control perennial weeds such as dallisgrass...

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