Do You Need to Fertilise Your Lawn When Overseeding?

The Complete Guide to Fertilising and Overseeding for the Perfect Spring Lawn

Overseeding your lawn after winter is a great way to restore your turf’s health and appearance and prepare it for the year ahead. So, if you’re planning to overseed your lawn this spring, then you’re already on the right path to achieving a thicker, healthier lawn. But what about feeding your lawn?

There is some confusion over whether you can fertilise and overseed your lawn at the same time, whether you need to do both, and the true value of overseeding and fertilising your turf. In this guide, we explain exactly why seed and fertiliser work best together to get a full, resilient, and vibrant lawn at home.

Content Overview:

• Overseeding vs lawn fertiliser
• What is overseeding?
• View our grass seed range
• What is lawn fertilising?
• View our lawn feed range
• Why seed and feed together?
• The benefits of overseeding & fertilising
• Speak to the experts

Overseeding vs Lawn Fertiliser

First things first, let’s break down the two different lawn tasks:

What Is Overseeding a Lawn?

Overseeding is a key part of spring lawn care and involves spreading new grass seed over an existing lawn. It can be applied to the entire lawn or to areas that are struggling to grow. Either way, overseeding helps you to:

• Fill in bare grass patches
• Improve lawn density by filling gaps
• Enhance colour and appearance
• Introduce stronger grass varieties

View Our Range of Grass Seed:

• Green Velvet Lawn Seed
• Green Velvet Shady Seed
• View All Seed & Feed

What Is Lawn Fertilising?

Fertilising a lawn involves applying liquid or granulated fertiliser across your lawn. Fertiliser is season-based, and packed full of the key ingredients that will support your turf’s health during the weather conditions for that particular time of year. For example:

• Autumn/winter fertiliser will focus on resilience for hibernation in colder weather
• Spring/summer fertiliser will boost growth, thickness, and colour.

View Our Range of Lawn Feed:

• Envy Spring/Summer Fertiliser
• Nourish Autumn/Winter Fertiliser
• View All Seed & Feed

Why Do Overseeding And Fertiliser Work So Well Together?

Grass seed in itself won’t guarantee success. You want to give your grass the best chance possible, and guarantee your efforts with a beautiful lawn; that’s where a lawn feed plays a crucial role.

When the aim is healthy, consistent growth, you want to match your grass seed with a spring/summer fertiliser such as our Envy Fertiliser. Spring/Summer feeds include key ingredients formulated to deliver results, including:

• Nitrogen for vibrant green colouring and leafy blades
• Phosphorus for strong root development
• Potassium for resilience and disease resistance

The Benefits of Overseeding and Fertilising At The Same Time

1. Supports Germination of New Seeds

New grass seedlings need immediate access to nutrients in order to grow. Without them, germination can be slow, uneven, or fail altogether. Turf fertiliser provides precisely what they need, enabling them to thrive even when conditions are not favourable. In fact, adding fertiliser alongside grass seed helps create a better growing environment.

Read more: How To Stop Birds From Eating Your Grass Seeds

2. Develops Strong Roots

Along with top growth, you want to ensure strong root growth. With a well-established root system, your new grass will anchor in securely and have access to key water, oxygen and nutrients that’ll help it thrive throughout the year. This is particularly helpful during hot summers where drought levels may be higher.

3. Prevents Patchy, Uneven Growth

One of the biggest frustrations with overseeding is inconsistent results, which you won’t notice until your grass begins to grow. Applying lawn fertiliser will prevent this disappointment by promoting even growth across the area. This helps guarantee a full, vibrant lawn, ready for summer use.

4. Helps Suppress Weeds

If you have thin or bare patches across your lawn, these are prime spots for weeds to appear – and they will do, quickly! A well-fed and overseeded lawn will grow thicker, stronger, and faster, naturally reducing the space weeds have to establish. It also helps new seeds compete with weeds for the space, sunlight, and nutrients they need.

5. Encourages Long-Term Health

Investing in your lawn’s health, condition, and resilience means you can enjoy a beautiful lawn year after year. Overseeding and fertiliser can help improve your turf’s performance, enabling it to self-repair after heavy use, bounce back after severe weather, and fight off common lawn diseases.

6. Leaves You With A Thicker, Denser Lawn

While grass seed encourages grass to grow, fertiliser helps those grass blades grow thicker, leafier and greener. This creates a dense, carpet-like appearance that makes your lawn look healthy and full of life. It also produces a soft textured surface, making it comfortable for kids, pets, and everyday use.

The Best Time to Seed And Feed A Lawn

For the best lawn results, overseeding and fertiliser should be applied in springtime when the growing season is active. You can either apply grass seed and fertiliser at the same time, spreading it evenly across your lawn. Or you can apply lawn fertiliser immediately after overseeding. This ensures that essential nutrients are available to seedlings at the start of their germination and growth journey.

Read more: How and When to Fertilise Your Lawn

Speak To The Experts

If you want a lawn that looks thicker, greener, and healthier this spring and summer, overseeding alone isn’t enough. Adding fertiliser to your overseeding is the secret ingredient to unlocking your lawn’s full potential!

By combining seed and feed, you give your grass everything it needs to establish quickly, grow evenly, and thrive throughout the season. At George Davies Turf & Stone, we have all the products you need. We also have a knowledge team of turf experts on hand to answer any questions.

Helpful Guides:

• Feeding & Fertilising: 5 Key Points
• What Temperature Is Too Cold To Fertilise A Lawn?
• How to Reseed A Lawn In Spring