Mowing well
What is the best height to cut grass?
Choose a sensible mowing height for ordinary UK lawns, shade, drought and the first or last cut of the year.
At a glance
- Start higher than you think.
- Measure the finished leaf, not the deck label.
- Remove no more than roughly one third.
- Raise the cut in shade, drought and autumn.
- Lower gradually only when growth is strong.
Why height matters
Grass leaf powers root growth. Repeatedly shaving it close reduces the plant’s ability to recover, exposes soil to heat and gives moss or weeds more room. A slightly longer lawn develops deeper roots, hides minor unevenness and withstands ordinary family use better.
Fine ornamental turf can be maintained lower, but it demands a level surface, frequent cutting, sharp equipment and more intensive care. Most domestic gardens look better for a resilient, even finish than an ambitious close cut.
Adjust for the garden
Raise the mower where trees or buildings reduce light, during a dry spell, on exposed slopes and before winter. Newly established grass should also be allowed to gain strength before its first gentle trim. Lowering the setting is safest in small stages during vigorous spring growth.
Scalped circles or stripes usually point to bumps, soft ground, tight turns or a setting that is too low. Correct the cause rather than repeatedly cutting the surrounding lawn down to match.
A simple one-third check
If the lawn is 60mm tall, taking it straight to 25mm removes well over a third. Set the mower higher for the first pass and return several days later. The lawn stays greener and the mower is less likely to block or leave heavy clumps.
Frequently asked questions
Is a shorter lawn always neater?
No. Close cutting can reveal bumps, pale stems and thin patches; an even medium-height cut often looks tidier.
What height should I use in a heatwave?
Raise the cutting height and mow less often. Stop if growth has stopped.
Further guidance
For deeper horticultural and safety information, use these authoritative UK sources:
This guide provides general domestic lawn-care information. Product labels, equipment manuals, weather, site conditions and professional advice take priority.