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Hard Surface Treatments

Why Overseed and Top Dress?

Grass plants are seriously affected by long periods of high temperatures and low rainfall, these conditions also encourage lawn disease which can cause the grass plant to die. The best defence against weeds and moss is a healthy and strong grass sward.

What is Lawn Overseeding and Top Dressing a lawn?

Top Dressing and lawn seeding a lawn is a beneficial part of lawn care, it can be a key factor in making improvements to the health, condition, and appearance of your lawn.

Over time, lawns start to thin out, allowing space for moss and weeds to take over. The best defence is to introduce new lawn seed into the lawn (Overseeding); this will ensure it remains thick, full and healthy on an ongoing basis.

Our Lawn Top Dressing is designed to supply the grass seed with long lasting nourishment, it protects the seed during the process of germination and feeds it when it is plant stage. The organic lawn dressing also enriches sandy soil as well as improving heavy soils like clay.

Top Dressing & Overseeding Explained

Watch our short video to understand how this treatment works, why it rejuvenates tired lawns, and the results you can expect when seed and top dressing are applied together.

How Often to Overseed Lawn?

Overseeding and Top Dressing should ideally be done once a year. Spring and autumn are the best seasons for overseeding because the soil is warm, and the weather provides optimal moisture conditions for germination. Regular overseeding helps maintain a lush, thick lawn and prevents thinning, which can lead to an invasion of moss and weeds.

Our Seed Mix

At GreenThumb, we use our exclusive Diamond Green seed blend to restore bare or thinning areas. This custom mix combines Perennial Ryegrass and Fescue species, selected to suit a variety of soil types. Ryegrass thrives in heavier clay soils, while Fescue performs best in lighter, sandier conditions. The result is a lawn that’s more resilient, greener, and better equipped to withstand future stress.

image of grass see in hand and being scattered onto soil
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    Perennial Ryegrass for strength

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    Strong Fescue for finer texture

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    Tailored for UK soil & climate

Benefits of Overseeding and Top Dressing

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    Helps to create a thick, healthy grass sward

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    This healthy sward helps to manage moss and weeds

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    Seed is designed to tolerate drought, shade, disease

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    Top dressing lawn helps with water retention and protecting the soil surface helping with drought

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    Helps to speed up recovery of the lawn after Aeration and Scarification

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    Giving the lawn an improved colour

Close-up of a hand gently touching lush, healthy grass—showcasing the thick, vibrant results of overseeding and top dressing treatments.

Top Dressing & Overseeding — The Key to Rejuvenating Tired Lawns

Ready to Thicken and Strengthen Your Lawn?

Book a consultation today and let us restore thin, tired turf with professional overseeding and top dressing—boosting density, colour, and resilience season after season.

Book a Free ConsultationContact Your Local Branch

See the Results for Yourself

Our Overseeding and Top Dressing treatment doesn’t just improve your lawn on paper — it transforms how it looks and feels. Explore the difference it can make through real-life benefits, from patch repair to lush growth and longer-term resilience.

Is Your Lawn Looking Patchy?

Thin, bare areas are a clear sign your lawn needs a boost. Overseeding fills gaps with fresh, healthy grass, restoring thickness and improving resilience.

Exclusive Diamond Green Seed

Our custom-blended grass seed combines Rye and Fescue species, tailored to UK conditions for a thicker, greener, more resilient lawn year-round.

Transform Your Lawn

See the results for yourself—scarification, top dressing, and overseeding work together to revive tired lawns and deliver lush, vibrant, healthy grass.

2 x YearBest times to overseed and top dress: spring & autumn*
5mmIdeal top dressing depth to improve soil structure*
3–5 DaysGermination time for our ryegrass blend in good conditions*
30%Top dressing boosts seed-to-soil contact by up to 30%*

*Figures shown are approximate and based on available data. For illustrative purposes only.