Eric Robson chairs the popular horticultural forum. Bob Flowerdew, Pippa Greenwood and Anne Swithinbank answer questions posed by members of Letchworth District Gardeners Association. Letchworth was the world's first garden city, founded in 1903 by social reformer Ebenezer Howard. Planners gave its citizens a generous space for each garden, and one of the founding principles was that the town should have the space to grow its own food. The panel find out whether Letchworth's history gives its gardeners an advantage today, given that the concept of self-sufficiency and the 'grow your own' movement are increasingly popular. Also, Anne Swithinbank unearths a local colony of rare - but temperamental - black squirrels and Pippa Greenwood explores ways of getting children interested in gardening during the summer holidays. Including Gardening weather forecast.