Kathy Clugston and her panel of gardening experts are in Buckinghamshire. Juliet Sargeant, Chris Thorogood and Matthew Wilson answer the horticultural queries. This week, the panellists suggest what to do with a sunflower peeping over the garden fence, and recommend the best way to stop a Yew tree splaying. They also share some planting ideas for a spot that enjoys constant sunshine. Away from the questions, Matthew heads to Kew Gardens to speak to Kevin Martin and Cecily Withall, finding out why we need more people in arboriculture. Producer: Daniel Cocker Assistant Producer: Bethany Hocken A Somethin' Else production for BBC Radio 4