Pupils from 12 Southwark schools will be selling their seasonal vegetables, grown and nurtured from seed.
The Harvest Sale is part of a project by Borough Market and School Food Matters, a charity whose mission is to ensure that every child enjoys fresh, sustainable food at school and understands where their food comes from.
With the help of funding from United St Saviour's Charity, the programme started back in the summer where pupils were taught some green fingered tips from Blue Peter gardener, Chris Collins.
These novice gardeners are now reaping the rewards of a sun-filled summer with bumper crops of squash, herbs, apples, beetroot and chard.
All proceeds from the sale will go to the charity FareShare.