Over time, even well-maintained UK lawns can experience thinning or bald patches due to decreased grass reproduction rates, heavy foot traffic, pests, or diseases. Overseeding is the process of sowing fresh grass seed into an existing lawn to boost its density and overall health.

When to Overseed in the UK

The best time to overseed a lawn in the UK is during spring or autumn when the soil temperature is optimal for seed germination. In spring, this usually falls between April and May, while in autumn, the ideal window is between late August and mid-October. Overseeding during these periods ensures the new grass plants have enough time to establish before facing extreme temperatures.

A Step-by-Step Guide to Overseeding in the UK

Step 1: Mow Your Lawn

Before overseeding, mow your lawn to a slightly lower height than usual (around 25-30 mm) and collect the clippings. Shorter grass allows the new seeds to make better contact with the soil and helps to keep the seeds moist.

Step 2: Aerate Your Lawn

Aerating your lawn helps improve air, water, and nutrient penetration into the soil. Rent an aerator or use a garden fork to create small holes throughout your lawn.

Step 3: Choose the Right Grass Seed

Select grass seed suitable for your lawn’s specific conditions, like foot traffic, shade levels, and soil type. In the UK, it’s common to use a seed mix containing perennial ryegrass, fescue, and Kentucky bluegrass.

Step 4: Spread the Seed

Spread the seed evenly across your lawn using a handheld or rotary lawn spreader. Consult the seed packaging for the recommended seeding rate. It’s essential not to overseed too heavily, as this can lead to competition among the young plants.

Step 5: Keep Your Lawn Moist

Water your lawn regularly, ensuring it remains well-hydrated during the germination phase. Light, frequent watering is best for newly seeded areas to keep the seeds consistently moist.

Step 6: Mow Carefully

Once the new grass reaches 5-6 cm (about 2-2.5 inches), begin mowing your lawn again at a careful height. Gradually reduce the mowing height while being cautious not to cut more than one-third of the grass blade length at a time.

The Advantages of Hiring Kingsbury Lawn Care

Overseeding can be a time-consuming and challenging process for the average homeowner, which is why hiring a professional lawn services like Kingsbury Lawn Care is a smart choice.

  • Expert Assistance: They evaluate your lawn’s specific needs, measuring the seed type and amount required based on various factors, such as grass species and lawn conditions.
  • Ensured Results: Professional overseeding services use premium grass seed and time-tested application techniques, assuring you of successful seed germination and establishment.
  • Lawn Maintenance Advice: Kingsbury Lawn Care provides expert tips on post-overseeding watering schedules, mowing practices, and fertilisation plans, helping you care for your newly overseeded lawn.


In summary, overseeding is an essential practice that refreshes thinning UK lawns and enhances their overall health and appearance. This guide, along with Kingsbury Lawn Care’s professional assistance, ensures your lawn benefits from an expertly executed overseeding process, rejuvenating it to lush and verdant perfection.