Mowing Frequency Calculator

Mowing frequency calculator

How often should you mow your lawn?

Tell me what you cut with and you'll get how often to mow and what height to set the mower to, for right now and for the rest of the year.

I'm Robbie. I've been working with grass for nearly 35 years, 20 of them as a greenkeeper.

What do you cut your lawn with?

How tall is the grass right now? If you know it

mm

Put it in and you'll see how low you can cut today without hurting the lawn. How to measure it

Right now

Weekly

Set the mower to30 to 50 mm
SeasonAutumn

Before you cut

How to check your grass height

  1. 1

    Grab a tape measure or a ruler.

  2. 2

    Push it down into the grass until it touches the soil, not the thatch sitting on top.

  3. 3

    Read it where the tips of the grass blades reach.

  4. 4

    Check a few spots. It won't be the same everywhere.

  5. 5

    Go with the average.

The one-third rule

Never take more than a third off the blade in one cut.

If it's got away from you, bring it down over a few mows. Scalp it in one go and it goes brown.

Read more about the one-third rule

The whole year

How your mowing changes through the year

Taller bars mean more cuts that month.

Know your grass?

Cutting heights by grass type

The heights above suit most lawns. If you know what grass you have, these are closer.

Grass Summer Winter

While you're at it

Get a better cut

  • Leave the clippings

    Mowing regularly? Leave the fine clippings on. They return nitrogen to the soil. Only collect them if they're long and clumpy from a missed cut.

  • Keep the blade sharp

    A blunt blade tears the grass instead of cutting it. Torn tips go white and the whole lawn looks dull. Sharpen it at least once a season.

  • Change direction

    Mow a different way each time. North to south one week, east to west the next. It stops the grass leaning one way and gives a better finish.

Watch

This one thing stops people getting the best lawn

If you can't get this right, it doesn't matter what else you do. Height of cut, the science behind mowing, striping, winter mowing, mulching and more.

What next

Mowing sorted. Here's the rest.

Common questions

Mowing questions I get all the time

How often should I mow my lawn in the UK?

During the main growing season (April to October), most UK lawns need mowing once a week. In peak growth (May, June, September) you might need to cut every 4 to 5 days, especially after rain. In winter, you might not need to mow at all, or just a light tidy once a month if the grass is still growing. Let the grass tell you when it needs cutting.

What height should I set my mower to?

For a rotary mower on a family lawn, 30 to 50 mm is the range. Most people do well around 35 mm. Cylinder mower for a finer finish? 10 to 30 mm. Robot mowers usually sit around 30 to 40 mm. During dry spells, raise the height by 10 to 15 mm. Longer grass shades the soil and holds moisture better.

What is the one-third rule?

Never remove more than one-third of the grass blade in a single cut. If your grass is 60 mm tall, take off no more than 20 mm, leaving 40 mm. Cutting more than a third stresses the plant and can cause browning. If it's grown too long, bring it down over two or three cuts.

Can I mow in winter?

Yes, if the grass is growing and conditions allow it. There's no rule that says November is the last cut. If it's mild and the grass is still putting on height, a light trim on the highest setting is fine. Avoid frozen ground, waterlogged conditions, or heavy frost.

Should I leave the clippings on?

If you're mowing regularly and the clippings are fine and short, leave them on. They return nitrogen to the soil. Only collect if they're long and clumpy from a missed cut. Heavy clumps smother the grass underneath.

What about robot mowers?

Robot mowers cut little and often, usually daily. They take off tiny amounts each time so the grass is never stressed. The fine clippings drop back into the lawn and return nitrogen to the soil. Set the height to around 30 to 40 mm and let it run. In winter you can pause it or let it run less often.

Unsure how much fertiliser you need for your lawn?

We make it silly simple. In 30 seconds you'll get your lawn size and a tailored plan for all your lawn needs.

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