How to Mow a New Lawn Without Damaging It

Lawn mower

Timing Your First Mow

Mowing too early is one of the most common mistakes made after lawn renovation. Grass needs time to establish roots before it can handle the stress of being cut.

Quick Answer: Wait until new grass reaches at least 7cm tall, is fully dry, and firmly rooted before mowing. Use a sharp blade and mow high.

Signs Your Lawn Is Ready to Mow

  • Grass blades are 7–10cm tall

  • The lawn feels dry underfoot

  • You can’t easily pull the grass out by hand

If in doubt, give it a few more days. Early mowing can rip out new seedlings and set growth back.

Best Practices for the First Mow

1. Use a Sharp Mower Blade

A clean cut heals faster and reduces disease risk. Dull blades tear grass.

2. Set Mower Height High

Cut no more than one-third of the grass blade. Aim for a cut height of 5–6cm for the first mow.

3. Mow When Dry

Wet grass clumps, tears more easily, and may clog your mower.

4. Avoid Collecting Clippings (Optional)

On dry days, leave the clippings to return nutrients—unless they’re too thick.

5. Mow Slowly and Evenly

Take your time. Avoid turning sharply or creating ruts in soft soil.

Always mow around the perimeter first, then work inward in straight lines.

Follow-Up Mowing Schedule

  • Week 1 After First Mow: Mow once if needed

  • Week 2–4: Mow weekly, increasing frequency as growth stabilises

  • Ongoing: Mow regularly, never cutting below 4cm for new lawns

Common Mistakes to Avoid

  • Mowing too soon (before roots are strong)

  • Mowing too short

  • Mowing when the lawn is wet or muddy

  • Using a heavy mower on soft ground

Mowing Equipment Tips

  • Use a lightweight rotary mower for new lawns

  • Check blades before each cut

  • Clean mower deck regularly to prevent fungal spread

Internal & External Resources

Frequently Asked Questions (FAQs)

What if the mower rips out some new grass?

Stop mowing and wait another 3–5 days. Water and monitor the area before trying again.

How often should I mow a new lawn?

Once a week after the first cut, gradually adjusting based on growth speed and season.

Should I mow differently for seed vs. turf?

Yes. Turf can be mowed slightly earlier, but both require careful timing and a high cut for the first few sessions.

Conclusion: Start Right, Grow Strong

Mowing is a milestone in your lawn’s recovery, but it needs to be done right. With patience and care, your new lawn will respond with thicker, greener growth.

Need help with mowing or maintenance? Contact Formby Gardener.

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