The one-size-fits-all 'mow every week' schedule is the most common lawn care error on Long Island. Proper mowing frequency should be driven by growth rate — which changes dramatically across seasons — rather than a fixed calendar schedule. Over-mowing in slow growth periods removes too much tissue; under-mowing in rapid growth periods forces you to cut too much at once, scalping the lawn.
Mowing Frequency by Season on Long Island
**Spring (April–May):** Long Island cool-season grasses grow most rapidly in spring — up to 1–2 inches per week in ideal conditions. During the peak spring flush, twice-weekly mowing may be needed to avoid cutting more than one-third of the blade length in a single session. Most customers on weekly contracts need an additional visit in May.
**Early Summer (June):** Growth slows as temperatures climb above 75°F. Weekly mowing remains appropriate through June for most Long Island lawns.
**Midsummer (July–August):** This is where most homeowners over-mow. Cool-season grasses slow dramatically or go semi-dormant when temperatures exceed 85–90°F for extended periods. A bi-weekly schedule (every 10–14 days) is often more appropriate than weekly mowing on a dormant or semi-dormant lawn — cutting dormant grass stresses it without adding any benefit.
**Fall (September–November):** Growth resumes with cooling temperatures and fall rains. Weekly mowing is appropriate through October, transitioning to bi-weekly in November as growth slows toward dormancy.
Frequently Asked Questions
Conclusion
Mowing frequency on Long Island should follow the grass's growth rate, not the calendar. The one-third rule — never removing more than one-third of the blade in a single cut — is the principle that prevents the most common mowing damage. When growth slows in summer, reduce frequency rather than lowering the blade.
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