Eric Robson takes his panel to visit Hadrian's Wall. Anne Swithinbank, Pippa Greenwood and Matthew Wilson offer horticultural help to the audience. This week, the panellists answer questions on Monkey Puzzle trees, vegetables to grow with children, and grafting heritage apple trees. They also advise on growing bamboo in a front garden, planting a brand new garden and taming a climbing hydrangea, Eric Robson drops into the Tullie Museum in Carlisle to ask what did the Romans ever do for us gardeners. Produced by Hannah Newton Assistant Producer: Laurence Bassett A Somethin' Else production for BBC Radio 4.