Patrick Joyce is the Nursery Manager at Longwood Gardens. He oversees the woody plant production and procurement for the Gardens. He earned a Bachelor of Science in Horticulture from West Virginia University and has been working in the Nursery Industry for over 11 years. When he isn’t working with plants he enjoys traveling, the outdoors, and being with his family.

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 becoming an expert on all things tree-related from propagation, production, planting, to management in the landscape.  His other areas of expertise relate to Arboriculture as he is an ISA Certified Arborist, Register Consulting Arborist, and Pennsylvania Certified Horticulturalist. Christopher has been a keynote speaker at local and regional events such as the CENTS conference in Columbus, Ohio, National Nursery Growers Business Coalition, and the Southeastern Pennsylvania Green Industry Conference at Delaware Valley University. Chris holds a Bachelor of Science in Ornamental Horticulture with minors in Environmental Science and Secondary Education from Delaware Valley University, and a master’s Certificate in Agriculture Business from Virginia Polytech in conjunction with Farm Credit.

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 Director), Paul played a major role in the Arboretum’s restoration of its historic gardens, architecture, and vistas with notable plant collections. He has taught Urban Horticulture at the University of Pennsylvania’s Landscape Architecture and Regional Planning Department and is a frequent contributor to horticultural publications.

Paul is a leader in the field of plant exploration and evaluation. He completed twelve expeditions to countries including China, Korea, Taiwan, Armenia, and the Republic of Georgia, where he collected plants from various sources to introduce greater genetic diversity.

The beautiful tree-lined streets of Milwaukee, Wisconsin first influenced Julianne Schieffer to make trees and forests her life’s passion. Armed with Urban Forestry and Botany degrees from the University of Wisconsin - Stevens Point, and an MS in Tree Pathology from the University of Massachusetts - Amherst, she came to Pennsylvania over 30 years ago to work with people and trees. Her current position as Penn State Extension Urban Forester allows her to promote sound tree and forestry practices for communities in the 10 counties of southeastern Pennsylvania. She is a Board Certified Master Arborist, Life Member of the International Society of Arboriculture, Certified Municipal Arborist, and is Tree Risk Assessment Qualified.

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 engaged in the life of the university through student engagement and collaboration with faculty and staff. Her other professional areas of expertise include environmental management and civic engagement with specific attention to the effects and presence of structural inequality, community conflict, and stakeholder development. Jennifer has authored numerous publications including a manual for the EPA on vacant lot re-greening in the Rust Belt and completed landscape design and management plans in communities ranging from Akim Oda, Ghana to a coastal marine lab in rural Georgia. Ms. Walker holds a Bachelor of Science in Landscape Horticulture from North Carolina State University, and a master’s in landscape architecture from the University of Georgia.

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 served several roles, including wildflower gardener and arborist. He served as Smith’s Chief Arborist for 15 years and has transformed the care of Smith’s arboretum from an external, contracted operation to an internal one with a team of three certified arborists.

Louise Clarke is a senior horticulturist employed by the Morris Arboretum of the University of Pennsylvania. She is the horticultural director of Bloomfield Farm, where she curates a woody plant collection that includes more than 1200 trees and shrubs on 67 acres. Louise also tends over 5,000 square feet of vegetated roofs.

Louise Clarke is a senior horticulturist employed by the Morris Arboretum of the University of Pennsylvania. She is the horticultural director of Bloomfield Farm, where she curates a woody plant collection that includes more than 1200 trees and shrubs on 67 acres. Louise also tends over 5,000 square feet of vegetated roofs.

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 in March/April 2005 and this year, celebrating its 15th year in publication.

The content of the magazine gives real examples that you can use directly in your garden while showing how to stretch garden resources. The articles are peppered with whimsy, with a good sense of humor and wonderment.

In this segment, Kathy will be talking about some of her favorite small trees for urban areas.

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 at Morris Arboretum. He retires in September.

Mindy Maslin founded Tree Tenders while working for PHS (Pennsylvania Horticulture Society) 30 years ago. The program has been adopted by many cities throughout the country. Mindy's unique perspective on trees comes from her early years as a social worker. Trees live in communities too!