Jean-Martin Fortier is a farmer, author, educator, and advocate for regenerative, human-scale, profitable agriculture. For over 20 years he and his wife Maude-Helene Desroches have operated les Jardins de la Grelinette, a successful 2-acre microfarm. His bestselling book The Market Gardener, which has sold a quarter million copies in nine languages, describes the biointensive principles used at his micro-farm. In 2015, he established a research farm, la Ferme des Quatre-Temps, where he trains apprentices and develops new strategies for market gardening, including year-round production. His methods of production are taught to a worldwide audience through the Market Gardener Masterclass, an online course of the Market Gardener Institute, which is tailored to small-scale food growers. He is the founder of Growers & Co., a tool and apparel company which celebrates sustainable, local, and equitable food producers. Jean-Martin farms and lives in Quebec, Canada.

Catherine Sylvestre is the director of vegetable production at la Ferme des Quatre-Temps, a collaborative farm project inspired by the principles of ecological polyculture and regenerative agriculture. Leader of the market garden team, she trains program participants and develops and implements best practices for cold season growing, specializing in crop protection and greenhouse production for northern climates. She is also technical advisor at the Market Gardener Institute, where she studies and teaches organic agriculture. In addition to her field experience, Catherine has a BSc in Ecological Agriculture and Professional Agrology and a Master's degree in Political Science. Her academic focus has been the rich and complex relationship between human beings and nature, which meets in agriculture. Through her research, writing, and training, Catherine hopes to provide other farmers and market gardeners with the tools and knowledge to produce their own successful winter harvests. She lives in Quebec, Canada.