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How to Repair a Burnt Lawn

After a long spell of sunshine, it's not unusual for a once-green lawn to look dry and scorched. Brown areas begin appearing around the garden, grass becomes brittle underfoot and, in severe cases, whole sections seem to have disappeared altogether. Before reaching for a bag of grass seed, it's worth taking a closer look at what's actually happened. In many cases, a "burnt" lawn isn't burnt at all. It's simply become dormant because of prolonged heat and a lack of moisture. Knowing the difference can save you unnecessary work, while repairing genuinely damaged areas at the right time will help your lawn recover much faster. Has Your Lawn Actually Died? One of the biggest mistakes gardeners make after a heatwave is assuming every brown patch needs replacing. Grass is remarkably resilient. During periods of prolonged drought, many lawns naturally enter dormancy to conserve moisture. Growth slows dramatically, the leaves lose their green colour and the lawn can appear completely lifeless, even though the roots remain healthy beneath the surface. A simple test is to gently pull on the grass. If it remains firmly rooted and you can see pale green or cream tissue near the crown of the plant, there's a good chance it will recover naturally once rainfall returns. Understanding whether drought-damaged grass can recover naturally can prevent unnecessary reseeding. What Causes a Lawn to Burn? Hot weather is rarely the only factor. Most burnt lawns are the result of several conditions occurring together. High temperatures increase evaporation, while dry soil leaves grass unable to replace the moisture it's losing. Cutting the lawn too short, heavy foot traffic and compacted soil can all add further stress. Some gardens are naturally more vulnerable than others. Imagine a south-facing lawn with very little shade. During a week of temperatures above 28°C, the soil may become completely dry by lunchtime every day. Compare that with a neighbouring garden that's shaded during the afternoon and retains moisture for much longer. Although the weather is identical, the second lawn often remains green for considerably longer. Garden shape also has an influence. In an L-shaped garden, the exposed section may become brown while the sheltered corner continues growing normally. Should You Repair It Straight Away? Usually not. If the weather remains hot and dry, newly sown grass faces exactly the same conditions that damaged the existing lawn. Unless you can water consistently for several weeks, it's often better to wait until temperatures begin falling or rainfall becomes more reliable. The Royal Horticultural Society recommends carrying out lawn renovation when moisture levels improve, allowing new grass to establish before it experiences prolonged stress. Their lawn advice is available at https://www.rhs.org.uk/lawns. Preparing the Damaged Area Once conditions improve, begin by removing dead material using a spring rake. This exposes the soil surface and allows you to see which areas genuinely require repair. If the soil has become heavily compacted, lightly fork or rake the surface to improve airflow and help roots establish more easily. Applying Pre Seed Fertiliser 6-9-6 before sowing provides young grass with the nutrients needed for strong early root development. Our wider range of lawn fertilisers can then support healthy growth throughout the season. Choosing the Right Grass Seed The best grass seed depends on why the lawn became damaged in the first place. If the area receives heavy use from children, pets or regular entertaining, Hard Wearing Lawn Seed provides an excellent balance of durability and recovery. Where speed is the priority, Fast Growing Lawn Seed helps establish new grass quickly, reducing the amount of time bare soil remains exposed. For smaller repairs, the 1kg Boxed Grass Seed for Fast Growing and Hard Wearing Lawns is a convenient option that combines both qualities. You can compare every mixture in our lawn seed collection. Repairing Bare Patches Once the soil has been prepared, spread the seed evenly before lightly raking it into the surface. Good seed-to-soil contact is essential for successful germination, so avoid leaving large amounts of seed sitting on top of the ground. Keeping the soil consistently moist during establishment is far more important than applying large amounts of water once a day. How often newly sown grass should be watered depends on the weather, but the aim is always to prevent the surface from drying out completely. If you're repairing larger areas rather than isolated patches, the process is almost identical to creating a new lawn. Growing a lawn from seed successfully explains each stage in more detail. Preventing Future Damage The best repair is the one you never have to make. Healthy lawns cope with drought much better because they've developed stronger root systems over time. Raising the mower by one setting during summer, watering deeply rather than frequently and avoiding unnecessary foot traffic during heatwaves all reduce stress on the grass. Choosing a seed mixture that's suited to your garden also makes a significant difference. If your lawn repeatedly struggles during long dry spells, choosing a grass seed for dry summers is often more effective than repeatedly reseeding with the same mixture. When Is the Best Time to Repair a Burnt Lawn? Although emergency repairs are sometimes unavoidable, late summer and early autumn generally offer the best conditions. The soil remains warm from summer, rainfall becomes more reliable and young grass has plenty of time to establish before winter. If you're unsure whether conditions are suitable, knowing when it's too early or too late to sow grass seed can help you avoid disappointing results.   Take time to establish whether the grass is dormant or genuinely dead, wait for favourable growing conditions and choose a grass seed that's suited to your garden and the way it's used. Combined with sensible watering and good soil preparation, these steps will help your lawn recover more quickly and become far more resilient when the next hot summer arrives.