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All compost test results

By Adele Dyer

Find the best compost for your gardening task: sowing seeds, raising young plants, growing plants in containers or planting veg in growing bags.

Put us to the test

Our Test Labs compare features and prices on a range of products. Try Which? to unlock our reviews. You'll instantly be able to compare our test scores, so you can make sure you don't get stuck with a Don't Buy.

30 years of compost-testing experience means we know just how much difference there is between a Best Buy and a Don't Buy compost. Here are our top picks for 2019

Composts for sowing seeds and raising young plants for 2019

We tested 25 composts at a well-respected horticultural research establishment. We used each compost to grow basil 'Puck' and Petunia 'Express Rose' seeds. As each has different needs, a compost that did well in both tests should suit most seeds. 

We also used each compost to grow on Antirrhinum 'White Appeal' plugs (young plants bought by mail order) and cabbage 'Caraflex' seedlings, until the largest were ready to be planted outside. 

For more information on the best composts, see our reviews of Best Buy composts for sowing seeds and Best Buy composts for raising young plants

Compost for sowing seeds and raising young plants
Compost for sowing seeds and raising young plants
Brand Price1 Sowing seeds Raising young plants Test score
Bathgate Champions Blend All Purpose £6.50 for 50L
Bord na Mona Growise Pro 5 All Purpose Compost £6.99 for 50L
Clover Multipurpose Compost £4.99 for 60L
Levington Original Mulitpurpose Compost £7.49 for 50L
Lidl Multi-Purpose Compost £1.99 for 40L
Lidl Peat Free Compost 99p for 20L
Melcourt SylvaGrow £6.99 for 50L
Melcourt SylvaGrow with added John Innes £7.99 for 50L
Miracle-Gro All Purpose Compost £6.49 for 50L
Sainsbury's Home Multi-Purpose Compost £2 for 20L
Thompson & Morgan Incredicompost £14.99 for 70L
Waitrose & Partners Multi-Purpose Compost £5 for 50L
Waitrose & Partners Peat Free Multi-Purpose Compost £4 for 30L
Westland Gro-Sure Seed and Cutting Compost £5.99 for 30L
Westland Jack's Magic All Purpose Compost £6.99 for 50L
Wilko Dry Cut Multipurpose Compost £4 for 40L
Wilko Sowing and Cutting Compost £2.25 for 20L
Wyevale Multipurpose Compost £6 for 50L
Wyevale Multipurpose Compost with John Innes £7 for 50L
Wyevale Peat Free Multipurpose Compost £6 for 50L

Table notes
1 Based on the 2019 selling  price of a large bag. Smaller bags are available, but are usually more expensive per litre.  

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Compost for containers
Compost for containers
Brand Price Pelargonims Potatoes Test score
Bathgate Champions Blend All Purpose Compost £6.50 for 50 litres
Bord Na Mona Growise Pro 5 All Purpose Compost £7 for 50 litres
Clover Multi-purpose Compost £5 for 60 litres
Levington Original Multi Purpose Compost £7.50 for 50 litres
Lidl Multi-Purpose Compost £2 for 40 litres
Melcourt SylvaGrow £7 for 50 litres
Melcourt SylvaGrow with added John Innes £8 for 50 litres
Miracle-Gro All Purpose Enriched Compost £6.50 for 15 litres
Sainsbury’s Home Multi-Purpose Compost £2 for 20 litres
Thompson & Morgan Incredicompost £15 for 70 litres
Waitrose & Partners Multi-Purpose Compost £5 for 50 litres
Waitrose & Partners Peat Free Multi-Purpose Compost £4 for 30 litres
Westland Gro-Sure All-Purpose Compost & 4 Month Feed £7 for 50 litres
Westland Jack’s Magic All Purpose Compost £7 for 60 litres
Wyevale Multipurpose Compost £6 for 50 litres
Wyevale Multipurpose Compost with John Innes £7 for 50 litres
Wyevale Peat Free Multipurpose Compost £6 for 50 litres
Table notes

1 Price based on the 2019 selling price. Based on the cost of a 50L bag or the nearest equivalent. Smaller bags of compost are usually more per expensive per litre. 

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