Tom Petherick is a writer, author, and journalist, specialising in biodynamic gardening and farming. He has written Biodynamic in Practice and How to Garden Organically amongst others, and written new content for this edition of Biodynamic Gardening. Monty Waldin is a consultant on biodynamic vineyard growing and has written articles for Decanter, the Grape Collective, and The Oxford Companion to Wine along with multiple books on biodynamic wine, wine in general, and the previous edition of Biodynamic Gardening with DK in 2015. From 2016-2021 Monty was the first host of the Italian Wine Podcast.