Fungi includes some of the most important organisms in our gardens, partnering with plant roots to help them access nutrients, processing dead material and nurturing countless vital processes – but often they are completely invisible to the naked eye. In this week's episode  of the BBC Gardeners' World magazine podcast we meet fungi expert and author of the bestselling book Entangled Life, Merlin Sheldrake, to find out more about these extraordinary organisms. Listen now by searching 'BBC Garde