Crabgrass is beaten in March, not July. Here's the timing, the products, and the mowing habits that keep it out of your lawn all season.
By the time you see crabgrass, it's already too late to prevent it — you're now treating it. Prevention is a spring job, and in Middlesex County that means late March to mid-April, before soil temperatures hit 55°F for several days in a row.
The two-part answer: a pre-emergent herbicide applied at the right soil temperature, and a thick, tall lawn that shades out the seedlings that slip through.
Cut at 3 to 3.5 inches all season. Short lawns invite crabgrass — every bare, sunlit patch of soil is an invitation for it to germinate.
All pre-emergent and post-emergent herbicides on our clients' properties are applied by MDAR Core Applicator licensed professionals, following the label and local regulations.
- Apply pre-emergent late March to mid-April, before soil hits 55°F.
- Mow tall (3–3.5 inches) to shade out crabgrass seedlings.
- Overseed thin spots — bare soil is a crabgrass invitation.
- Use a licensed applicator for any herbicide work.
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