The Plant a Trillion Trees Podcast

Steve Shreiner is the president and founder of Schreiner Tree Care established in 1986. He is a Master Arborist, and Tree Risk Assessment Qualified. Steve has proven successful in developing long-standing client and vendor relationships, many of which are twenty-five-plus years strong. He also enjoys working with clients who care about their trees, landscape, and the greater community. Shreiner ha...

Sir Tim Smit KBE (Knight of the Most Excellent Order of the British Empire) studied Archaeology and Anthropology at Durham University. This began a lifelong passion for regeneration and putting his passion and energy into his work. He has followed his occupations embracing his many interests from Archaeology through music to wreck diving, Rare Breed animal husbandry, and building restoration. In 1...

Nan Sterman is a California native, garden expert, garden designer, author, botanist, and award-winning communicator. Nan has long been dedicated to the transformation of planted landscapes from overly thirsty and resource-intensive to climate appropriate and sustainable. In addition to designing gardens, Nan works hard to connect plants to people and the planet. Some examples of that work include...

Anthony Tresselt is a certified arborist, arboricultural safety consultant, trainer, and 30-year student of arboriculture and tree climbing.  He is a lead instructor with Arboriculture Canada (ArbCan) Training and Education. As a part of the amazing ArbCan team, he travels, educates, facilitates, and writes helping to spread the word about safe, efficient arboriculture. Anthony’s mission as a...

Andrew Bunting is Vice President of Horticulture and leads the utilization of planting and design to promote environmentally sound gardening practices at PHS (Pennsylvania Horticultural Society). Andrew has elevated each of the departments he oversees and has increased the brand and visibility of PHS through their respective work. Andrew received his Bachelor of Science in Plant and Soil Science f...

Christy Rollinson is the Forest Ecologist at The Morton Arboretum in Lisle, Illinois. As a research scientist, much of her work looks at how individual trees, forest communities, and ecosystems respond to changing weather and climate. Christy’s work involves a variety of approaches, including tree rings, phenology and citizen science, and computer modeling. Christy holds a Bachelor of Arts in Biol...

Anelle Ammons is an ISA Certified Arborist® and ISA Certified Arborist Utility Specialist®. She has a Bachelor of Science degree in biology from the University of North Carolina at Asheville and a Master of Horticulture Science from North Carolina State University. Anelle works as a contract Utility Arborist and spends her free time gardening, hiking, and writing children's adventure books.

At the intersection of power tools and creativity, John Mahoney found his niche – turning otherwise forgotten urban green waste into dazzling works of art. Born into a family of tree workers, arborists, and creatives, it was no mystery that Big John would find himself carving his own legacy into the Urban Forest just as his dad did before him. When he began chainsaw carving at the age of 22, John...

Tahia Devissher is a Banting Research and Teaching Fellow at the University of British Columbia (UBC) Faculty of Forestry. She studies how to manage forests and other greenspaces in and around cities to support human well-being and build social-ecological resilience to climate change. She is also interested in developing practical strategies to strengthen the relationship between urbanites and nat...

Mike Toffan is the founder and Executive Director of Project Forest.  In October of 2020, Project Forest launched with a mission to create a community of environmentally responsible businesses with a unified mission to Rewild the Canadian Landscape One Forest At A Time.  Mike is passionate about restoring disturbed landscapes across Canada, specifically to restore ecological function to...

Theo Hooker is a systems thinker and nature-based solutions champion based in Washington, DC. He is passionate about cultivating businesses that are both good for people and the planet while laying a roadmap for other businesses to follow. He believes that in order to create a just and sustainable future, we have to imagine a new way of interacting in the world. In 2020, he co-founded Cambium Carb...

Brice Dorwart is an ISA-certified arborist and utility specialist. He has worked for the last 11 years with Davey Resource Group, on a utility vegetation management contract with a major power company in Pennsylvania. He has volunteered extensively with the PHS TreeTenders program, helping various neighborhood clubs around the city of Philadelphia, especially with their young street-tree pruning e...

Heather Andrews is a published author, photographer, and speaker who routinely works with homeowners and businesses to create sustainable native pollinator habitats. She grew up as one of 12 grandchildren in North Carolina, and often took walks in her Granddaddy Andrews acre garden, where she learned about pollinators and increasing yield. During the growing season, you will find her in her monarc...

David Barmon is owner of Epilogue LLC, a small-scale sawmill business just South of Portland Oregon. He co-owned Fiddlehead LLC, a Portland, Oregon-based landscape construction company for 15 years. David has milled hundreds of thousands of board feet of lumber and installed countless edible landscapes and rain gardens in the Portland area. In a former career, David spent almost a decade as a Japa...

Glenn Eck has been in the horticulture and landscape industry since 1985. He was fortunate to receive a foundation of education and training through the Longwood Gardens Professional Horticulture Program, and a student year with England’s Royal Horticultural Society. Since 1997, Glenn has been managing the grounds and urban horticulture at Temple University in Philadelphia. He is a volunteer with...

Michael Dunn is an innovative Urban Forest Manager and Consulting Arborist with a passion for progressive problem-solving of environmental issues and a vision for a sustainable future in the designed urban environment. He is eager to collaborate with community and borough planners and stakeholders to manage and optimize the urban forest infrastructure as a shared and valuable asset. Michael is abl...

Michael Joshin Thiele’s pioneering approach to apiculture and honeybee conservation has appeared in national and international magazines, books, and films. He has presented his work at Harvard University and New York University, consulted for the USDA, and in 2006 developed the organization Gaia Bees to advance biodynamic practices in apiculture. In 2017 he founded Apis Arborea to preserve the lif...

Dr. Ed Gilman is a professor emeritus from the University of Florida and is a principal at Wood Architecture, Inc. His 35 years in academia and the green industry have led him to write the Illustrated Guide to Pruning , which is now in its third edition. Ed has a long list of achievements and awards including honorary membership in the American Society of Landscape Architects (ASLA) in 2016, an au...

Kevin Martin is the Head of Tree Collections at the Royal Botanic Gardens, Kew, having joined in 2012. In his role, he is charged with the curation and management of Kew’s unique and historic collection of trees from around the globe for the purpose of scientific research and conservation within a UNESCO World Heritage Site landscape. Kevin has a foundation degree in arboriculture and is a TRAQ-ce...

Dr. Clint Springer is an associate professor of biology at Saint Joseph's University in Philadelphia, Pennsylvania. Clint is also the director of the Institute for Environmental Stewardship and the first faculty director of the Barnes Arboretum at Saint Joseph's University (formerly the Arboretum of the Barnes Foundation). Clint's research has examined the response of plant physiology and developm...

Sophie Nitoslawski is passionate about finding ways to better integrate trees and green infrastructure into the fabric of our cities. Her research centers on the intersection of smart communities and urban forest management, and she works with both private- and public-sector partners to pilot digital-based monitoring and management systems for urban ecosystems. In addition to her Ph. D. work, Soph...

Neil Hendrickson worked for Bartlett Tree Research Labs where he served as their Northeast Technical Specialist for over twenty years before his retirement in 2019.  Neil is a New Jersey Licensed Tree Expert and maintains his tree risk assessment qualifications. He now serves as chair of the Readington Township, New Jersey, Environmental Commission, and Tree Advisory Committee, and is a membe...

Cliff Drouet is a Forester with the Office of Surface Mining Reclamation and Enforcement(OSMRE) which is a federal agency under the Department of the Interior. Cliff is working with the Appalachian Regional Reforestation Initiative(ARRI). The program restores old surface mine sites throughout Appalachia by planting native seedlings and establishing wildlife habitats. This reforestation program was...

Tom Kimmerer is a scientist, author, and photographer.  He is a consulting forest scientist, working with landowners and with other scientists and natural resource management professionals to ensure a future for the woodland pastures of Kentucky and Tennessee. He consults on sustainability issues related to forest management and wood utilization, including carbon sequestration in forests and...

As the founder, principal, and guiding influence of Viridian Landscape Studio, Tavis Dockwiller leads a team that works every day to make sure they leave more than they take – and have fun while they're doing it. Her belief in the essential and healing power of landscapes drives all of the firm's design projects and ecological master plans. A natural storyteller and gifted communicator, Tavis know...