The Plant a Trillion Trees Podcast

Hugh Weldon gained early knowledge of horticulture working on vegetable farms in Ireland – his home country. He earned a horticulture certificate …

Mayor Tim Schultz has been a resident of Hatboro for over 20 years. Devoted to his community, Tim has served in the capacity of Borough Historian, a …

Ashley Miles is the Administrative Production Assistant at Ruppert Nurseries and has held other positions such as In-House Salesperson and Inventory Manager. Ashley has been with Ruppert since 2013. She has a Bachelor …

Jill Rose is the State Forest Pathologist with the Pennsylvania Department of Conservation and Natural Resources (DCNR) Bureau of Forestry since …

Steve Shreiner is the president and founder of Schreiner Tree Care established in 1986. He is a Master Arborist, and Tree Risk Assessment Qualified. …

Sir Tim Smit KBE (Knight of the Most Excellent Order of the British Empire) studied Archaeology and Anthropology at Durham University. This began a …

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 …

Anthony Tresselt is a certified arborist, arboricultural safety consultant, trainer, and 30-year student of arboriculture and tree climbing.  He is a …

Andrew Bunting is Vice President of Horticulture and leads the utilization of planting and design to promote environmentally sound gardening …

Christy Rollinson is the Forest Ecologist at The Morton Arboretum in Lisle, Illinois. As a research scientist, much of her work looks at how …

Anelle Ammons is an ISA Certified Arborist® and ISA Certified Arborist Utility Specialist®. She has a Bachelor of Science degree in biology from the …

At the intersection of power tools and creativity, John Mahoney found his niche – turning otherwise forgotten urban green waste into dazzling works …

Tahia Devissher is a Banting Research and Teaching Fellow at the University of British Columbia (UBC) Faculty of Forestry. She studies how to manage …

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 …

Theo Hooker is a systems thinker and nature-based solutions champion based in Washington, DC. He is passionate about cultivating businesses that are …

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. …

Heather Andrews is a published author, photographer, and speaker who routinely works with homeowners and businesses to create sustainable native …

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 …

Glenn Eck has been in the horticulture and landscape industry since 1985. He was fortunate to receive a foundation of education and training through …

Michael Dunn is an innovative Urban Forest Manager and Consulting Arborist with a passion for progressive problem-solving of environmental issues and …

Michael Joshin Thiele’s pioneering approach to apiculture and honeybee conservation has appeared in national and international magazines, books, and …

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, …

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 …

Dr. Clint Springer is an associate professor of biology at Saint Joseph's University in Philadelphia, Pennsylvania. Clint is also the director of the …

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 …

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 …

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 …

Tom Kimmerer is a scientist, author, and photographer.  He is a consulting forest scientist, working with landowners and with other scientists 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 …

Eliza Greenman is a tree crops specialist, horticultural historian, and agroforestry practitioner living in Northern Virginia. Her passion is in …

Ian Hanou is a trees and technology-loving entrepreneur with 20 years of private sector experience. He earned a B.S. in Forest Management and GIS …

Douglas Meney is the Director of Horticulture with the American Battle Monuments Commission (ABMC), a position he has held since 2014. Mr. Meney …

Amanda Benner is a Principal Program Manager for Vegetation Management at PECO, an Exelon Company, and lives in Philadelphia. Prior to joining the electric utility, she held non-profit leadership positions at the …

Dan Herms is Vice President of Research and Development for The Davey Tree Expert Company.  Prior to joining Davey, Herms served on the faculty in …

Anthony (Tony) Aiello is Associate Director of Conservation, Plant Breeding, and Collections at Longwood Gardens, where he participates in tree …

Zhaohua (Cindy) Cheng is a Ph.D. candidate in urban forestry at the University of British Columbia (UBC). She has over five years of experience in …

Edward (Ned) Sibley Barnard was for 17 years senior staff editor and managing editor of Reader’s Digest General Books, where he oversaw the …

Erica Smith Fichman has spent her career connecting people with plants.  As the Community Forestry Manager at Philadelphia Parks & Recreation, she is the project lead for the Philly Tree Plan.  Erica also supervises …

Joe Hansen is an ISA Certified Arborist Municipal Specialist, Tree Risk Assessment Qualified (TRAQ), and holds numerous certifications through the …

Steve Blaes holds degrees in sustainable horticulture and environmental science and has over 20 years of experience in the green industry. He has …

Jake Handley was born in San Luis Obispo, California, and grew up in Eustis Florida where he received a bachelor’s degree in art history from the …

Dana Dentice is a Trees Program Manager and an ISA-certified arborist at PHS. She leads the Tree Tenders program (with now nearly 6000 graduates) to empower citizens to protect and expand tree canopy in communities …

Jeffrey Ling is an International Society of Arboriculture (ISA) certified arborist, registered consulting arborist, and senior consulting arborist in …

Jan Johnsen is a principal of the award-winning Johnsen Landscapes & Pools in New York, and an admired garden designer and author. She was the …

Dr. David Bengston is an Environmental Futurist and Social Scientist with the Strategic Foresight Group of the Northern Research Station, USDA Forest …

Nate Shampine, CERP, is Mt. Cuba Center’s Natural Lands Manager responsible for implementing land conservation practices and developing healthy and …

Brian “BK” Koehler has been the director of the Park Maintenance Institute since early 2020. BK holds degrees in Business Administration (BS), Parks …

Linda Langelo is a Colorado State University Extension, Horticulture Agent. The five counties under her care are in Northeast Colorado. In 2020, a …

Melissa Custic manages the Chicago Region Trees Initiative (CRTI). The CRTI is a collaboration of regional partners working together to improve the …

Amber Grant is a Ph.D. Candidate (ABD) in the Environmental Applied Science and Management program at X* University (formerly known as Ryerson University). Her doctoral research focuses on examining environmental …

William Fuchs is the Head Gardener at Andalusia Historic House, Gardens, and Arboretum. William has worked in several positions at Andalusia over the last 22 years including 14 years as the Head Gardener. William came …

Mohamed M. Hassona is the Head Horticulturist at the Qur'anic Botanic Garden, the Qatar Foundation in Ar-Rayyan, Qatar.

Hassona joined the Foundation …

Josh Behounek is the Business Development Manager with Davey Resource Group. Josh started his career as an inventory arborist working on many large-scale street tree inventories across the country. He then transferred …

Katie Dubow is president at Garden Media Group, a women-owned and run public relations firm specializing in the home and garden industry. Author of the annual Garden Trends Report, Dubow travels the world scouting and …

Jason Lubar has been employed at Morris Arboretum of the University of Pennsylvania as the Associate Director of Urban Forestry for over twenty years. His career has focused on educating a wide audience about trees and …

Tom Knezick is the General Manager of Pinelands Nursery & Supply.  He became interested in the agricultural and the nursery industry as a child …

Megan Barstow is the Conservation Officer at Botanic Gardens Conservation International. She began her career as a Global Tree Search Intern, compiling species lists of trees and their country-level distributions …

Neil Pederson is a Senior Ecologist at the Harvard Forest who studies the dynamics and long-term development of forests from individual trees to …

Jennifer Santoro is a Visiting Assistant Professor in the Department of Geography and the Environment (GEV) at Villanova University, where she teaches courses in Geographic Information Systems (GIS) and Environmental …

Allison Brown holds a Ph.D. in Botany from the University of California, Davis where her research focused on the significance of mycorrhizal fungi in …

Susan Downing Day is a Professor of Urban Forestry in the Department of Forest Resources Management at the University of British Columbia in …

Ari Miller is the director of design at Hinge Collective, a public interest design firm that puts community engagement and public participation at …

Bill Logan (William Bryant Logan) has spent the last five decades living with trees, as a writer, arborist, and teacher, first in coastal California and the Sierra Nevada, then for the last thirty years in the …

Dr. Tony Kendle is a horticulturist, educator, and researcher. He is the co-author of Urban Nature Conservation: Landscape Management in the Urban …

Pandora Young is a Senior Horticulturist working in Longwood Garden's Outdoor Landscapes since 2005. The areas under her care are Peirce’s Park, a …

Sara Fern Fitzsimmons has worked with The American Chestnut Foundation (TACF) at Penn State University (PSU) since 2003, assisting chestnut growers and researchers throughout the Appalachian Mountains.  Born and raised …

John Holback’s environmental experience started as a child helping his dad cut invasive vines from the trees in the woods around their home. He …

Corey Bassett is a Ph.D. student at the University of British Columbia in Vancouver, British Columbia, Canada where she is researching urban forest …

Dr. Jun Yang is a Professor in the Department of Earth System Science at Tsinghua University, China. He received his Ph.D. (2004) in Environmental …

Andrea Whitely is a garden consultant, designing and implementing new gardens, garden renovations, and garden maintenance in Perth, Australia.

Andrea …

David Hewitt has been working with plants, animals, soils, and water
for more than twenty-five years, starting when he began working on
small farms …

Max Paschall is the Native Plants Coordinator at the Schuylkill Center for Environmental Education, managing the nursery and native plant sales. He …

Alan M. Jones is President of Manor View Farms in Monkton, Maryland. He was born in London, England, and immigrated to the United States in 1984.

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Today’s Show is a special edition highlighting the Pennsylvania Horticultural Society’s (PHS) Philadelphia Flower Show. We have two special guests …

Jason Lubar has been employed at Morris Arboretum of the University of Pennsylvania as the Associate Director of Urban Forestry for over twenty years. His career has focused on educating a wide audience about trees and …

Konstanze Fabian is an ISA Certified Arborist and ASCA Consulting Arborist. She holds a bachelor's degree in horticulture from Temple University and …

Alex Smith is the owner of Division Street Landscaping, which is entirely staffed by ex-offenders. Alex started his journey while he was …

Jim Duggan leads the marketing and sales operations for Rootmaker Products Company, Inc. He oversees directing the sales organization and developing digital marketing programs to build the adoption of the Rootmaker …

Carol Wagner is a long-time horticulturist at Haverford College in Haverford, Pennsylvania a suburb of Philadelphia. A life-long resident of …

Phil Forsyth currently serves as Co-Executive Director of the Philadelphia Orchard Project (POP), a non-profit that plants and supports community orchards in the City of Philadelphia.  Phil has led POP’s orchard design …

Dwayne Sperber, founder, and owner of Wudeward Urban Forest Products has dedicated himself to building the urban wood industry. For nearly 20 years he has advised on the vast potential of this renewable resource. Dwayne …

Lara Roman is a Research Ecologist with the USDA Forest Service, Northern Research Station, Philadelphia Field Station. She studies the temporal …

Daan Bleichrodt is on a mission to re-connect urban kids with nature worldwide. He is Chief Tree Planting Officer at the IVN environmental education and leads the Tiny Forest movement in the Netherlands. He is also a …

Lori Hayes is the Director of Urban Forestry, and District Tree Crew, Districts 5, 6, 7, & 8, Philadelphia Parks & Recreation and is a …

Diane Ehrich owns Collins Nursery, a small retail nursery in Glenside, Pennsylvania which specializes in container-grown native plants from the …

Richard McCoy has over 30-years of experience in the green industry. He is the visionary behind Richard A. McCoy Horticultural Services Inc., founded …

Abra Lee is a national speaker, writer, and owner of Conquer the Soil a platform that combines Black garden history and current events to raise …

Max Blaustein is an Environmental Scientist with the Philadelphia Department of Parks & Recreation's Natural Lands Management team. His work has focused on the restoration and operation of a historic nursery …

Robin Rick has been a Woodlands Grave Gardener since 2016 and The
Woodlands' Facility and Landscape Manager since 2018. It is with great
pleasure and purpose that Robin works to care for the locally and
nationally …

Jordan Foreman grew up in Central Jersey just a stone's throw from Six Mile Run.  He has always loved to hike in the woods, but it wasn't until he …

Dale Hendricks has been growing and propagating plants professionally since 1975. In 1988 he co-founded North Creek Nurseries, Inc in order to propagate and grow perennials and grasses with an emphasis on natives and …

Hasan Malik's fascination with trees has been a constant for as long as he can remember.  With a hand pruners or saw, he readily gave attention to the tree problems he encountered growing up in Northeast Philadelphia. …

Michael Dunn is the founder and president of Preservation Tree and is the Consulting Municipal Arborist for West Chester Borough in Pennsylvania. He …

Steve Goin is the Director of Land and Facilities at the Schuylkill Center for Environmental Education, the largest privately held greenspace in the city of Philadelphia. He graduated from Penn State University with a …

Aaron Greenberg is the Arboretum Manager for Laurel Hill and West Laurel Cemeteries, where he oversees gardens, grounds, and a collection of over …

Robert Wells (Bob) is a consulting arborist with 49 years of experience in the arboricultural industry.

He entered the tree world as a climber with …

For over two decades, Charles King Sadler has immersed himself in the design and care of landscapes throughout North American, this has resulted in …

Joan Maloof is a writer, an ecologist, and a conservationist with a unique voice in today’s times. She has studied and worked with plants her entire …

Maria is a 4th generation nurseryman and proud of it! After graduating from Penn State with a BS in Horticulture, she ran the family’s 1000-acre …

Nancy Buley is Director of Communications for J. Frank Schmidt & Son Co., wholesale tree growers of Boring, Oregon, where she has been “talking …

Andy Schenck, a self-professed plant nerd, is the owner of Sam Brown’s Wholesale Nursery in Malvern, PA where he has worked for 22 years. Andy …

John Berryhill is the Landscape Curator for the Botanic Garden of Smith College where he has worked for just over 23 years. In that time, he has …

Patrick Joyce is the Nursery Manager at Longwood Gardens.  He oversees the woody plant production and procurement for the Gardens.  He earned a …

Christopher Uhland is the Head Arborist and Owner of Harmony Hill Nursery, LLC a field production woody plant nursery in Downingtown, Chester County, PA.  He enjoys the challenge of growing trees and shrubs as well as …

Paul Meyer is the retired F. Otto Haas Executive Director of the Morris Arboretum.  During his 43-year tenure at the Arboretum (28 years as …

The beautiful tree-lined streets of Milwaukee, Wisconsin first influenced Julianne Schieffer to make trees and forests her life’s passion. Armed with …

Jennifer Walker is the Head Gardener at the Barnes Foundation at Saint Joseph’s University. She enjoys the challenge of managing and growing the tree canopy and other flora of this historic arboretum, as well as being …

John Berryhill is the Landscape Curator for the Botanic Garden of Smith College where he has worked for over 23 years. During that time, he has …

Julie Snell is co-founder and principal at TEND landscape inc, a woman-owned landscape architecture firm in Philadelphia, and co-owner of Redbud …

Louise Clarke is a senior horticulturist employed by the Morris Arboretum of the University of Pennsylvania. She is the horticultural director of …

Kathy Jentz is Editor, Publisher, and Founder of Washington Gardener Magazine which is published specifically for the local metro area of Washington D.C. and its suburbs. The premier issue of the magazine was released …

Bob Gutowski Director of Education, Visitor Experience, and Outreach at the Morris Arboretum of the University of Pennsylvania shares his many years of tree planting as a child and right through his professional career …

Mindy Maslin founded Tree Tenders while working for PHS (Pennsylvania Horticulture Society) 30 years ago. The program has been adopted by many cities …