Orsolya (Orsi) Lazar is an urban forester, an ISA Certified Arborist and a Pennsylvania (PA) Certified Horticulturalist in Sustainable Landscapes. Her unconventional path to forestry began with a Master’s Degree in Ecology and a Master’s Degree in Molecular and Cell Biology. She has over 20 years of experience in landscape design and management, project management, and education.

Orsi became the first Community Tree Specialist at Pennsylvania DCNR’s Urban and Community Forestry Program. She helps shape this growing program to better serve communities by building trust, identifying opportunities, and finding creative solutions to challenges. 

She works with municipalities and non-profits to increase tree benefits, manage costs and risks, and creates green spaces that suit people’s needs.

She is a member of the Pennsylvania Landscape and Nursery Association and is in the group that is working on updating the PA Certified Horticulturist study manual.

Orsi has taught gardening and tree care for diverse audiences, including workforce development programs.  Many local parks have benefited from her technical assistance and plant donations.

She created a tree inventory and installed hundreds ofbotanical signs at Merion Botanical Park as a pro bono contribution to her own community. Her “Responsible Gardening” Facebook group helps local gardeners connect and share sustainable, evidence-based practices.

When not in the garden or a park, she enjoys teaching tricks to her border collie or is on the dance floor practicing ballroom and Latin dancing.

Jonathan Mullard is a Fellow of the Royal Society of Biology, a Founder Member of the Chartered Institute of Ecology and Environmental Management, and a Chartered Town and Country Planner.  He had combined a passion for the natural environment with a career in conservation and spatial planning.

In the early 1980s, Jonathan worked alongside Max Nicholson, the pioneer ornithologist and environmentalist, on developing an urban woodland strategy for London. This involved setting up a project in Crystal Palace to save a fragment of the Great North Wood. Later, Jonathan came across the Capon Tree, one of the few remaining trees from the Jed Forest in the Scottish Borders. Along with his experience of growing up in Shropshire and researching the lost Forest of Morfe, it started an interest in lost forests and their remains.

Jonathan is the author of Forgotten Forests: Twelve Thousand Years of British and Irish Woodlands and three books on Wales published in the Collins New Naturalist series: Gower, Brecon Beacons, and Pembrokeshire.

When you ask Basil Camu what he thinks about himself, he'll tell you he is incredibly lucky. He has family he loves dearly, friends and colleagues who inspire him, and every day he gets to care for trees, soil, and flowers. He pursues his purpose and passions as the co-founder of Leaf & Limb, a tree care company in Raleigh, NC, and Project Pando, a non-profit that aims to connect people to trees. He is a Treecologist, ISA Board Certified Master Arborist, Duke graduate, Wizard of Things, and author of the book From Wasteland to Wonder – Easy Ways We Can Help Heal Earth in the Sub/Urban Landscape. His work has been featured in the New York Times, Seattle Times, Forbes, Gardenista, The Joe Gardener Show, The Plant a Trillion Trees Podcast, A Way to Garden with Margaret Roach, and a number of other publications and podcasts.

When Basil is not having fun at work, he likes to pull invasive plants from his pocket forests, contemplate on his front porch, and go hiking with his family.

Rick Hartlieb and his wife Jen are natives of Berks County, Pennsylvania, where their home farm is located. First-generation farmers, their story begins 25 years ago when they were both in the FFA program through the Conrad Weiser Area School District. Rick pursued a forestry program through Penn State University, where he attained an Associate of Science degree in Forest Technology at Penn State’s Mont Alto Campus. He then went on to receive his Bachelor of Science degree in Forestry at Penn State’s main campus.

Rick’s work started with chestnuts as a volunteer with the Pennsylvania Chapter of the American Chestnut Foundation in 2005. In 2008, Rick started his forestry career as a Service Forester with the Department of DCNR (Conservation and Natural Resources) Bureau of Forestry covering Berks, Lancaster, Chester Counties.

For ten years from 2014-2024, Rick was the assistant manager for resource stewardship in the William Penn District. In 2024, Rick moved into the district manager role.

Rick and Jen’s farm story began in 2017, when they were looking for a farm setting to raise their family. They purchased a farm with a collection of 100-year-old chestnut trees, now called Castanea Farms. Chestnuts are their main crop.

Natalie Carmolli manages Public Relations for Spring Meadow Nursery and Proven Winners® ColorChoice® shrubs. She grew up in the floral industry and holds a bachelor’s degree in theatrical arts, along with a Certificate of Mastery in tree and shrub identification from Longwood Gardens.

An avid gardener and dynamic communicator, Natalie is passionate about sharing her love of gardening with shrubs, whether online, traveling across the country, or in her own backyard.

Mary Tipping has held the position of Curator and Plant Recorder at the Scott Arboretum & Gardens at Swarthmore College in Swarthmore, Pennsylvania since 2015 after working as the Horticulturist at the Henry Schmieder Arboretum of Delaware Valley University in Doylestown, Pennsylvania.  In her current position, she is responsible for curating, recording, mapping, and labeling a vast array of plant collections, which encompass over 11,500 woody plants and thousands of herbaceous plants. 

She is an ISA Certified Arborist® and the Philadelphia Flower Show Nomenclature Chairman.  Her plant passions include oaks, beeches, Stewartia, conifers, witch-hazels, deciduous azaleas, and ferns, just to name a few.