Kathy Clugston and the gardening experts are at RHS Garden Wisley. Matthew Pottage, Christine Wilson and Matthew Wilson answer this week's questions from gardening enthusiasts. The panellists discuss black fly, offer planting suggestions for shady areas, and advise on growing Luffa. They also talk about how they were inspired to start gardening. Away from the questions, Matthew Wilson catches up with Matthew Pottage, three years into his role as Curator of RHS Garden, Wisley to see what he's been up to. Producer: Laurence Bassett Assistant Producer: Jemima Rathbone A Somethin' Else production for BBC Radio 4