Compost & Soil

Our wide range of compost includes multi-purpose for general gardening use as well as specialist ranges for growing specific types of fruit, veg, flowers, plants, shrubs and trees. You'll also find a variety of premium potting accessories that will have your garden blooming in no time, including soil additives, growbags and mulches.





Shop by Purpose

Fruit & Vegetable

Our Range of Fruit & Vegetable Compost are specially blended, free drainage mixes that contain the perfect balance of nutrients for your Fruit & Vegetable plants to stay healthy and promote a bigger crop yield.


Seedlings are delicate and sometimes need a helping hand if they are to grow into healthy, established plants. Seeding compost is the secret ingredient for a flourishing garden and gives sensitive seeds the best start in life so they can grow and thrive.

Young Plant

Give your seedlings and super plugs the best start at growing with a specialist Young Plant Compost. Formulated for the best root development. Find the perfect compost for potting on seedlings or slightly more mature young plants.


Provide your flowering bulbs with the best start for the strongest development with a specialist Bulb Compost. Bulb Compost is crafted to support the growth of healthy bulbs as well as healthy flowers.

Tomato Plant

Tomato compost is specifically formulated to provide the nutrients that tomatoes need to thrive, such as nitrogen, phosphorus, and potassium. These nutrients promote healthy plant growth and improve fruit yield.

Alpine Plant

Specialist Alpine Compost contains a clever blend that provides a vital low-level feed designed to establish strong roots and a free-draining soil. Added zinc boosts the strength and resilience of young and maturing alpine plants.

Acid Loving

Our range of specialist Ericaceous Compost are the perfect medium for keeping your lime-hating, acid-loving plants healthy.

Perfect for Rhododendrons, Camellias, Azaleas and many more.

Pots, Baskets and Container Compost

Compost for pots and containers is specifically formulated to provide optimal growing conditions for plants confined to small spaces. It's typically lightweight, well-draining, and nutrient-rich, ensuring adequate moisture retention and aeration.

Buy in Bulk

Bulk Buy Compost

Our Compost pallets are the most convenient and best value way to buy compost. The range has been specially selected to give you the perfect growing medium to keep your plants healthy and promote growth

Bulk Buy Bark

With many benefits such as weed suppression and moisture retention, bark is the perfect addition to any garden. Indulge in your landscaping fantasies without breaking the bank. Plus, with more bark on hand, you can dream bigger and execute grander projects.

Bulk Buy Potting Grit

Introducing potting grit into your soil mix can improve drainage and aeration, which is beneficial for plant roots. It helps prevent soil compaction and promotes healthier root growth. When adding potting grit, aim for a ratio of about 1 part grit to 2 parts soil for optimal results.

Bulk Buy Horticultural Sand

Horticultural sand is a crucial component in gardening and landscaping and serves various purposes in soil management and plant care. Horticultural sand also aids drainage, improves aeration, and prevents soil compaction, fostering optimal root growth and plant health.

Soil Additives & Improvers

Potting Grit

Introducing potting grit into your soil mix can improve drainage and aeration, which is beneficial for plant roots. It helps prevent soil compaction and promotes healthier root growth.

Barks & Mulches

Barks and mulches serve many purposes, with the benefits reaching far beyond their immediate surroundings. Not just a decorative finish to a border or a weed suppressant.


Manure is rich in organic matter and essential nutrients like nitrogen, phosphorus, and potassium. These nutrients are vital for plant growth and productivity.

Horticultural Sand

Horticultural sand aids drainage, improves aeration, and prevents soil compaction, fostering optimal root growth and plant health.


Perlite is a natural, non-toxic mineral that is lightweight and has thermal insulation properties which makes it ideal for use as a pot topper


Vermiculite is used as a soil amendment to improve moisture retention and aeration, it can also prevent bacterial and fungal problems such as damping off and root rot


Container gardening is a great in small spaces, improving your existing soil or gardens where there is no soil at all.

A Beginners' Guide to Gardening

It’s so rewarding growing your own crops, with fresh and tasty produce harvested straight from your garden. But if you’re new to growing vegetables, you may be intimidated or unsure which crops to select or compost to use. Luckily, our comprehensive beginners' guide to gardening has all the tips and tricks you need to master the basics.

Growing Guides

Whether you're growing onions, spuds, fruit or flowers, we've got you covered. Explore our range of growing guides giving you helpful, friendly and above all expert advice on how to get success from your garden.

Seed Compost & Soil Advice

What is the difference between seed compost and multi-purpose?

When you're germinating large numbers of seedlings, providing them with the ideal growth medium is essential for them to thrive.

Peat-free or specialised seed compost has the correct balance of nutrients that young seeds and saplings need for strong root growth, free drainage and good germination. Seed compost is finer in consistency, allowing seeds to push through, and has less concentrated levels of nutrients than multi-purpose compost. Seeds are already rich in nutrients. Too many nutrients at this stage will reduce essential early root growth.

Multipurpose compost is better suited to general gardening and established plants. The nutrient-rich organic material fertilises soil and offers excellent moisture retention when, for instance, potting plants in hanging baskets.

How do I use seed compost in my garden?

All our seeding compost can be used straight from the bag, but its use may differ depending on whether you are sowing straight into the soil or not. If you are planting into a container or pot, you can expect the best results by following these steps:
1. Place your seed compost into a seed tray or pot, while staying mindful to not make it too compact.
2. Make sure that the compost is moist but not saturated before sowing your seeds. Soggy compost and soil can slow germination and cause seedlings to rot.
3. Sow your seeds on top before covering them with the same depth of compost as the thickness of the seed.

Can I use any garden compost for seeds?

While you can opt for standard potting mixes and multi-purpose compost, we would advise against it since results can fluctuate, especially when planting in seed trays. Different seeds have different needs throughout their growing cycles and specialist composts give your seedlings the best chance of success.
To reduce the number of failed germinations and produce the lushest yields, we always recommend using the right potting soil and compost for your purpose.

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Why Buy Seed Compost from Marshalls Garden?

  • We're experts in all things garden-related and have over 70 years' experience providing the right tools and products for expanding, planting and maintaining your garden. Look at our growing guides if you need gardening advice.
  • Check out our thousands of 5-star reviews from satisfied customers on Feefo. You can buy with confidence thanks to our 100% satisfaction guarantee on our products.
  • Our team is dedicated to helping you achieve the best results in your garden so we're on hand to help six days a week. This includes Bank Holidays, so please reach out to us!
  • When you order with us, you'll receive your purchases, including seeding compost and potting soil, with express UK delivery and fully recyclable packaging.
  • We're proud winners of the silver award in the Best Online Retailer category at the 2022 Great British Growing Awards.