Kathy Clugston chairs the horticultural panel show. Chris Beardshaw, Anne Swithinbank and Matthew Pottage are on hand to answer questions from green-fingered listeners.This week the panellists are joined by a virtual audience as they tackle questions on how to ripen tomatoes and the best plants to provide pollen late in the season, and help a listener struggling with their cacti. Away from the questions, Peter Gibbs joins Matthew Pottage at RHS Wisley to discuss the box-hedge caterpillar and they suggest variations to replace the box hedge, and Chris Thorogood teaches us about a plant which looks like Darth Vader. Producer - Dan CockerAssistant Producer - Rosie MerotraA Somethin' Else production for BBC Radio 4