Eric Robson chairs the popular horticultural forum. Matthew Biggs, Anne Swithinbank and Bob Flowerdew answer questions posed by members of St Ann's Allotments in Nottingham. Matthew introduces Britain's oldest and largest allotment site and meets a selection of allotment-holders occupying a 670-garden enclosure, including the owners of a greenhouse constructed entirely from plastic bottles. He also talks to prize-winning fruit grower Adrian Baggley, who identifies and propagates rare heritage fruit trees as part of the allotments' National Lottery Heritage Project. Including Gardening weather forecast.