We use cookies to allow us and selected partners to improve your experience and our advertising. By continuing to browse you consent to our use of cookies. You can understand more and change your cookies preferences here.

Coronavirus Read our latest advice
Reviews based on facts
Our rigorous tests find the facts, and our impartial reviews tell you the truth about how products perform. First month £5, then £9.99 per month, cancel anytime.
Try Which?

Compost advice guides

10 articles
You can't pick a good compost by choosing the most expensive one. The only way to find the best performer for your seeds, young plants, pots and veg is to read the results of the Which? compost tests

Best compost

Are you looking for the best compost for your garden? We reveal the the top composts for sowing seeds, raising young plants and growing plants in containers.

Best composts for containers

You need a great compost to grow pots of bedding and bumper crops of veg. Our tests find the best composts for pots and containers.

Best composts for raising young plants

Before planting your seedlings and small plug plants, look at our round-up to find out which compost will give them the best chance of growing big and healthy

Best composts for sowing seeds

Seeds are self-contained packages that have everything inside them to germinate and start to grow. They just need fine, well-drained compost.

Best grow bags

Before planting your cucumbers and tomatoes, look at our round-up to find out which grow bags will give them the best chance of growing big and healthy.

Controlled-release fertilisers

Our test of controlled-release fertilisers shows you which will keep your plants looking good all summer long.

How to choose the right compost

Choosing the right compost can seem confusing. Read our guide to find out how to pick a compost that will be perfect for your gardening jobs. 

How we test compost

We’ve been testing compost for over 30 years and we’re still astounded by the variable quality of the bags for sale.

Should I buy peat-free compost?

Peat-free composts are at the forefront of compost development as we look to reduce peat use. We look at the pros and cons of alternatives to peat and how to use them successfully.