Gardeners' Question Time

Peter Gibbs and a panel of horticultural experts visit the RHS Wisley Greening Skills Garden in Woking, Surrey, an exciting new project designed to inspire and equip the next generation of horticulturists. No postbag edition is complete without listeners' questions, so the panel dips into the GQT inbox to answer various gardening conundrums. Joining Peter are head gardeners and garden designers Pippa Greenwood, Matthew Pottage and Matthew Biggs.