The Royal Horticultural Society's history is explored, plus we learn what it takes to be an RHS gardener as hopefuls from around the world begin training. With Rachel de Thame. Executive producer Owen Gay; Series producer Richard Sinclair BBC BOOK: Gardening with the Experts by Rachel de Thame and Phil McCann , in conjunction with the Royal Horticultural Society, price £19.99 Buy gardening essentials - RT Shop: page