If you have a small garden or even a balcony, growing potatoes in grow bags is a great option. Watch this short Quick Tips video with Kevin Smith, BBC Gardeners’ World Magazine, for advice on the best compost to use in growing bags.
A John Innes formula compost, containing loam, is good for potatoes in grow bags. Lighter mixes can dry out too easily. John Innes No.3 is good, as potatoes are hungry crops and you could also mix in some ericaceous compost to keep lime levels low. Whatever compost you use, though, you’ll still need to water and feed generously once the plants are in active growth – confined to bags they need all the help you can give them.