Matthew Wilson, Bunny Guinness and Anne Swithinbank are on the panel in Saltash.
BBC Radio 4
Eric Robson chairs a horticultural Q and A from Grange-Over-Sands in Cumbria.
Peter Gibbs chairs a gardening Q&A with the Cottage Garden Society, North Wales.
Eric Robson chairs a programme from the Royal College of Physicians beside Regent's Park.