How and when to overseed your lawn

Our guide on when and how to overseed your lawn will help you maintain a healthy, weed-free lawn without using chemicals. Overseeding involves sowing new seeds into an existing lawn. The time it takes depends on the size of your property, but it’s a great way to revitalize your grass.

mowing the lawn

Why overseed your lawn 

Over time, your lawn may become thin and patchy, allowing weeds to take root. Overseeding is an effective way to fill in these bare spots and thicken your lawn overall.

When to overseed your lawn 

The best times to overseed your lawn are in the spring (March to early May) and the fall (late August to September). While you can overseed in the fall, avoid doing so during the summer when high temperatures can hinder seed germination. Choose a cooler day for optimal results.

How to overseed your lawn 

  • Begin by clearing your lawn of weeds, fallen leaves, and other debris. If necessary, use a scarifier to remove moss.
  • Mow your lawn on a low setting and collect the clippings.
  • Aerate your lawn by poking holes into the soil with a garden fork. Then, apply a thin layer of topdressing (a fine material like compost) to the areas where you’ll be seeding.
  • Sow the seeds according to the package instructions and lightly rake them into the soil.
  • Gently press the seeds into the soil by walking or patting the area.

How to care for your overseed lawn

To ensure the grass seeds germinate, keep them moist but avoid overwatering. Use a fine-mist sprinkler to prevent the seeds from being washed away. Once the grass reaches 5-8 cm in height, you can start mowing it on a higher setting.

Maintaining a beautiful lawn can be rewarding, and it doesn’t have to be difficult. Overseeding is a great way to keep your grass thick and healthy.

Need help revitalizing your lawn? Our St. Albans garden centre has the expert advice and top-notch products you need from grass seed to gardening tools.