Garden lawns in the UK will grow back thicker and stay greener throughout July if gardeners follow one essential rule: cut the grass every one to two weeks at a height of two to three inches, according to gardening experts. Raising the lawn mower blade to this height reduces stress on the grass, helps it retain moisture, and encourages denser growth.
Why Cutting Height Matters in July
Adjusting the cutting height of your mower is critical during the summer months. The Turf Doctor explains: “Regularly mowing your lawn helps make the grass greener and thicker. You might have heard that getting your hair trimmed regularly helps it to grow faster, and the same goes for the grass on your lawn!” When grass is cut consistently at a decent height, the plant produces new shoots and leaves through a process known as the “stimulation effect.” This stimulates lateral growth, promoting a denser turf as the grass compensates for the loss of leaf on top. Regular mowing also prevents weeds from developing, allowing grass to access more sunlight, nutrients, and water.
Avoid Cutting Grass Too Short
The Turf Doctor warns against scalping the lawn, as cutting grass too short puts excessive stress on it and inhibits photosynthesis. “When grass is cut too short, it reduces the surface area of the leaves available for photosynthesis, which weakens the leaves, making them more vulnerable to environmental stresses. Scalped grass also struggles to develop a robust root system because it doesn’t have the necessary energy reserves. As a result, the grass becomes thinner and less able to compete with weeds, leading to an overall unhealthy and less green appearance.”
Benefits of Taller Grass in Summer
Gardening experts recommend raising the mower blade height by around half an inch to one inch in summer. Taller grass shades the soil, keeps roots cooler, and retains more moisture. This means less watering is needed, which is especially useful during summer when hosepipe bans are common. Rainmaster Lawn advises: “Taller grass helps a lawn grow thicker and stay greener. Mow too short, and the soil heats up, helping pesky weed seeds to germinate. That will not help you grow the perfect lawn. As summer progresses, you should keep raising your mower blade.”
Practical Tips for a Thicker Lawn
Following this July rule not only keeps grass healthy but also reduces maintenance. With regular mowing at the correct height, your lawn will allocate more resources to growth, leading to a lush, green appearance. So, set your mower blade to two to three inches, mow every one to two weeks, and enjoy a thicker, more resilient lawn all summer long.
