Kathy Clugston hosts a special edition at the annual Summer Garden Party. Bob Flowerdew, Matthew Pottage, Bunny Guinness and Neil Porteus are answering the horticultural questions at National Trust Mount Stewart in County Down, Northern Ireland. This week, the panellists discuss improving a beetroot crop, the time to deadhead your Hydrangea and the best variety of Witch-hazel. They also give advice on saving an over-watered Rhododendron, helping a Scots Pine thrive against the sea salt exposure, and how long it takes for an Allium to flower. Away form the questions, David Maxwell from BBC Ulster roams around the Garden looking at some of the highlights. Produced by Hannah Newton Assistant Producer: Jemima Rathbone A Somethin' Else production for BBC Radio 4