With her bestselling book Finding the Mother Tree, forest ecologist Suzanne Simard introduced the world to notion of intelligence and interconnectedness of trees. Now, with When the Forest Breathes, she uncovers the ways that nature's deep-rooted cycles of renewal can ensure the longevity of threatened ecosystems.
Raised in a family of loggers committed to sensible forest stewardship, Simard has watched as timber companies leave forests at higher risk for wildfires, water crises, and plant and animal extinction. But her research has the potential to chart a new course. The forest, she reveals, is a symphony of finely honed cycles of regeneration – from mushrooms breaking down logs to dying elder trees passing their genetic knowledge to younger ones – that hold the key to protecting our forests. Working closely with local Indigenous communities, whose models of responsible forestry have been largely dismissed, Simard examines how human interventions – particularly destruction of the mature overstory trees – endanger new growth and longevity. If we can honour the tools that trees have honed for sharing intergenerational wisdom, she argues, we can protect these sacred places for many years to come.
As she considers how older living things facilitate the conditions for new growth to flourish, Simard faces parallel rhythms of loss and regeneration in her own life, watching her two daughters grow into adults and savouring her final days with her ailing mother. Animated by wonder for our forests and the intricate practices of caretaking that have long sustained them, When the Forest Breathes is a vital reminder of all the natural world has to teach us about adaptability, resilience, and community.
Dr Suzanne Simard was raised in the Monashee Mountains of British Columbia. She is Professor of Forest Ecology in the University of British Columbia's Faculty of Forestry, and has earned a global reputation for her research on tree connectivity and communication and its impact on the health and biodiversity of forests.
"The Indiana Jones of trees returns [...] Inspiring [...] few people can speak about trees with quite as much conviction as Simard [...] She is a Canadian national treasure and global environmental icon"
– Mythili Rao, Guardian
"Practical as well as passionate [...] a combination of personal memoir, scientific explanation and praise for indigenous and ancient traditions"
– Victor Mallet, Financial Times
"[Simard] is the pioneering Canadian ecologist who has changed the way we think about forests [...] this book will attract anyone who is fascinated by forests and their remarkable capacities"
– Kate Teltscher, Spectator
"Suzanne Simard has helped transform our understanding of the profound intelligence and interconnectedness of trees"
– Liz Else, New Scientist, best new popular science books of March 2026