Gardeners' Question Time

Is it worse to over water or under water hanging baskets? Does rhubarb have a life expectancy? Are south facing gardens worthy of the hype?   Kathy Clugston and the GQT team are in Worsley, at the stunning gardens of RHS Bridgewater to answer more horticultural queries. Joining her this week are garden designer Bunny Guinness, proud plantsman Neil Porteous and Marcus Chilton-Jones, curator of RHS Bridgewater.   Peter Gibbs visits Royal Botanic Gardens, Kew, where Head of Garden Design, Richard Wilford gives him a sneak preview of the brand new design of their famous herbaceous border. Producer: Dan Cocker Assistant Producer: Dulcie Whadcock Executive Producer: Hannah Newton A Somethin' Else production for BBC Radio 4