How can plants help solve serious crimes? In this week’s Gardeners’ Corner David Maxwell meets the forensic experts that use plants to give them clues. National hedgehog day fell this week – apparently a Roman precursor to ‘Groundhog day’ and with these small mammals still on the red list, wildlife expert Debbie Nelson brings Holly the Hedgehog into studio to explain what gardeners can do for them. Legendary plantsman Jan Ravensberg chats to David about a lifetime with plants and social media sensation ‘Anya the Garden Fairy’ (aka Anya Lautenbach) on her new book ‘The Money Saving Gardener’. David is also joined in studio by expert Anna Hudson who will answer questions and give a how-to on sowing tomato seeds. Contact the programme on gardenerscorner@bbc.co.uk