Home > Cutting > Recommended Grass Cut Heights

Recommended Grass Cut Heights

By: Jack Claridge - Updated: 28 Sep 2012 | comments*Discuss
Recommended Grass Cut Heights How Short

Mowing your lawn is something you will do many times throughout the course of the gardening year and with that in mind it is useful to have an idea as to how long your grass should be, given the variety of different grasses available and the seasons in which they will grow.

The most important aspect of mowing your lawn is not to cut the grass too short.

Cutting the grass too short leads to poor root growth and that in turn leads to poor leaf growth. Leaving your grass at a reasonable length is a good way of preventing rough grasses such as crabgrass taking hold.

The rule of thumb is not to remove more than one third of your grass' height in any one mowing. The best way to achieve this is to mow your lawn - in the summer months for example - once every three to four days - this allows for regrowth and ensures that as you cut the lawn back you are not cutting away too much and stunting its growth.

Below are a list of the most common grasses to be found in gardens in the United Kingdom and their recommended cut lengths:

  • Bluegrass - When it reaches 7.5 cm cut back to a height of 5 cm
  • Ryegrass - When it reaches 7.5 cm cut back to a height of 5 cm
  • Fescue - When it reaches 7.5 cm cut back to a height of 5 cm
  • Tall Fescue - When it reaches 7.5 cm cut back to a height of 5 cm
  • St Augustine - When it reaches 7.5 cm cut back to a height of 5 cm
  • Buffalo Grass - When it reaches 7.5 cm cut back to a height of 5 cm
  • Bermuda - When it reaches 5.5 cm cut back to a height of 3.25 cm
  • Zoysia - When it reaches 5.5 cm cut back to a height of 3.25 cm
  • Centipede - When it reaches 5.5 cm cut back to a height of 3.25 cm
During periods of dry weather it is advisable to cut your grass slightly longer so that it allows the soil beneath it to retain water, longer grass ensures that it takes longer for the sun in dry spells to evaporate the water content in the soil, thus allowing it to last longer in conditions where it may not be possible to water it such as in the event of a hose pipe ban.

When cutting the grass at any time of the year it is important to remember that although the grass looks healthy and may well be healthy, the cutting of the grass has a definite effect on the root system beneath the soil so special care must be taken to ensure that the grass length is conducive to sustaining healthy roots.

When you have mowed your lawn it is wise to scarify it and remove as much of the dead clippings as possible so as to avoid a build up of Thatch, which - as we have discussed already - can lead to fungi and other lawn diseases.

You might also like...
Share Your Story, Join the Discussion or Seek Advice..
Why not be the first to leave a comment for discussion, ask for advice or share your story...

If you'd like to ask a question one of our experts (workload permitting) or a helpful reader hopefully can help you... We also love comments and interesting stories

(never shown)
(never shown)
(never shown)
(never shown)
Enter word:
Latest Comments
  • Ren
    Re: Problems With a New Lawn
    Hi moved into a new build last June, they turfed our garden but the lawn was dead when layed so was turfed again in October but by…
    5 March 2019
  • MacO
    Re: Above Ground & Underground Lawn Pests
    @Cherry Court - it sounds very strange. Are there any drainage pipes in that area which could be causing the…
    21 September 2018
  • Cherry Court
    Re: Above Ground & Underground Lawn Pests
    Hello We have had a problem with a corner of the lawn, which was developed about 14 months ago using compost and…
    20 September 2018
  • arthur
    Re: Problems With a New Lawn
    AS bove i had a new turfed lawn put down early june, before it was laid the ground was rotavated,raked, leveled,heeled in,good quality…
    3 March 2018
  • Ady
    Re: Types of Grass
    @Freshman - You need a drought-tolerant grass. Buffalograss is native to the midwest-America and is very hardy - but still needs 1/4" of water per…
    18 December 2017
  • Freshman
    Re: Types of Grass
    Hi Can you please advise me for the best grass seed to grow in Africa Ghana Thanks
    15 December 2017
  • Molly
    Re: Questionnaire: Are You Clued-up on Common Lawn Problems?
    Previous neighbours have emptied there water butts into our garden through a hidden pile, then…
    5 October 2017
  • David in Devon
    Re: Adjusting Your Soil's PH
    On the ph advice on lawns, you state that rhododendrons flourish in alkaline soil. Really? If so, you need to inform RHS that they are…
    26 September 2017
  • Col455
    Re: FAQ: Lawn Mowers
    @graham - Have you thought of getting someone like Green Thumb in to treat your lawn. They can spot all the diseases etc and give you the best…
    19 September 2017
  • graham
    Re: FAQ: Lawn Mowers
    I have a lawn that was 1st laid down some 22 years ago and it is on 2 levels with a slope between. It covers approximately 25m x 15m and consists…
    18 September 2017