In addition to the above, this is a very useful product for those with a bad back. It's lighter than your average compost and easier to move about.
Miracle-Gro expand 'n' gro compost
The lightweight compost that performs like a true heavyweight, as this unique lightweight formulation expands up to 3 times when watered. Each bag makes 40 litres of compost and holds up to 50% more water than other potting composts. Feeds for up to 6 months and is perfect for containers and particularly hanging baskets. This compost is enriched with Miracle-gro plant food and is 100% peat free.