But according to the UK’s largest turf manufacturer, which has sold over 160 million rolls of turf in the last four decades, the best thing you can do for an established lawn is often nothing at all. Letting the grass go dormant and search for its own water encourages deeper roots and long-term health, even if it looks dead for a while.
When to water — and when to let it be
An established lawn does not need routine watering. They advise that letting the grass find its own moisture forces roots to grow deeper, which builds resilience. If you do water, the key is timing. Water in the early morning or evening, when evaporation is lowest. Soak the ground thoroughly but less frequently, rather than giving it a light sprinkle every day.
Water when the lawn is still green but starting to show stress — slowed growth, a dulling of the normal bright green color. And always check local hose-pipe restrictions before turning on the tap.
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If you cannot water, there is no need to panic. The turf will go brown, but it will recover once rain returns.
Mowing and feeding in a heatwave
When the grass stops growing, stop mowing. If you can’t water, don’t cut. Once growth resumes, raise the mower blades higher than usual. Longer grass keeps the soil cooler, traps moisture, and reduces evaporation. It also leaves more green leaf visible, which helps the lawn look less straw-like even in dry conditions.
Sharp mower blades matter. Blunt blades bruise the leaves and make the lawn look even more pale and tired. That’s an easy fix that costs nothing.
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Do not apply fertiliser or other chemicals to a drought-stressed lawn. The company warns that at best they won’t work, and at worst they will scorch the grass. Let the lawn recover naturally first.
What to do when rain finally returns
After a dry spell, the soil can become compacted. When water becomes available again, some light spiking with a garden fork or a spiked roller can help water penetrate. Aeration to relieve compaction and scarification to reduce thatch buildup may also be necessary — but only after the ground is moist again, not before.
In summer, you can still give attention to your lawn’s edges to keep it neat.
