Can You Remove Stubborn Lawn Weeds During a Heatwave Without Ruining Grass? A Lawn Care Expert Reveals All

The UK’s latest heatwave has left lawns parched and vulnerable to weed infestations, but treating them now can be a costly mistake. Weeds may thrive in dry conditions, making it seem like the perfect time to strike.

However, experts warn that spraying lawn weeds during this period can do more harm than good. According to Jonathan Davis, a grass expert at Lawnsmith, treating weeds while the grass is dormant or drought-stressed is not only ineffective but also hazardous for the already-struggling lawn. “Weedkiller doesn’t work well in dry conditions,” he explains, “and your lawn is more likely to get damaged by it.”

The main issue lies in the fact that weedkillers require moisture to be effective, and in dry conditions, the treatment can cause further damage to an already-under-pressure lawn. Davis emphasizes that no particular product will overcome poor growing conditions, making it essential to follow label instructions – many selective lawn weedkillers advise against use during drought conditions.

The long-term benefits of treating weeds in dry conditions are also questionable. Even if some effect is seen initially, the treatment is unlikely to last, and further weeds may appear once wetter weather returns. “Treating during the drought may provide limited benefit,” Davis cautions.

While chemical treatment might be off-limits for now, there are still ways to manage weed growth without putting your lawn at risk. A small number of isolated weeds can be removed carefully by hand, provided this does not disturb the surrounding turf. This approach may take longer than spraying a weedkiller, but it won’t put extra stress on an already-stressed lawn.

In addition to pulling weeds by hand, there are other tasks that can be done safely during a drought. If watering is possible, using a wetting agent to help rain or irrigation soak in properly and lightly pricking the surface to aid absorption can make a difference. Regular mowing also helps prevent weeds and weed grasses from setting seed.

To determine whether your lawn is suffering from drought stress or another issue like lawn burn or red thread requires some detective work. Davis suggests checking for moisture levels by cutting a small hole in the lawn about three inches deep and inspecting the soil. If it’s dry, dusty, or crumbly, drought is likely to blame.

The key takeaway is patience – wait until moisture has returned to the soil and both the grass and weeds are actively growing again before applying any treatments. This rule of thumb applies not only to weed control but also to feeding, scarifying, and seeding.

Prioritizing lawn care during dry conditions is essential. By doing too much too soon, you may end up causing more harm than good. When the rain returns, your lawn will thank you for waiting – and so will your wallet.