Who We Are

Mission, Vision,
& Values

Staff &

News &

Public Policy & Partnerships


What We Do

The Delaware Center for Horticulture inspires individuals and communities through the power of plants. Since 1977, we have cultivated a greener community by creating and maintaining the first Urban Farm in the city of Wilmington, beautifying public landscapes, planting and advising on the placement of urban trees, mobilizing volunteers, and hosting community events and educational programs, including our Branches to Chances® Return to Work program and our Neighborhood Tree Steward Program. Because much of our work occurs in low income neighborhoods with higher rates of disease, environmental contamination, and poor access to healthy foods, our educational efforts also emphasize the personal health and sustainability benefits of gardening.

DCH is the only nonprofit membership organization in Delaware that mobilizes and inspires community greening statewide in urban and suburban environments. By inspiring an appreciation for improving our environment through horticulture, education, and conservation, we have become a leader in improving and beautifying communities by harnessing the power of our members, volunteers, and staff to go out and make a difference.

Our members come from Delaware and the surrounding region and bring with them a passion for plants only matched by that of our staff members.

With more than 600 active and dedicated volunteers annually, we have a tremendous amount of community support, which allows us to accomplish the impossible.

Why It Matters

The work of DCH strengthens the social fabric and builds more livable towns and cities by enhancing the environmental, economic, and aesthetic qualities of our cities and state. Working together, we create neighborhoods that are healthier, more attractive, and more ecologically sustainable. Simply put, DCH is about people and plants.

Our Staff

Executive Director

Joanne McGeoch

Email: jmcgeoch@thedch.org   Phone: 302-658-6262 x101

Joanne comes to the Delaware Center for Horticulture with more than two decades of non-profit executive leadership and fundraising experience, with an emphasis on environmental conservation, education, and sustainable agriculture. Most recently serving as the Vice President for Philanthropy at the Delaware Community Foundation, her passion for the environment has led to a successful career inspiring donors to support our community’s most pressing needs.

Previously, Joanne served in advancing leadership roles at the Delaware Nature Society, where she led fundraising and strategic planning initiatives aimed at expanding the organization’s growth in key areas including comprehensive development and master plans for their Coverdale Farm Preserve, environmental education, and a variety of conservation initiatives and programs.  She also held leadership positions at Greener Partners and Tyler Arboretum in Southeastern, PA.  She started her nonprofit career in Wilmington in 2003 as the development director for Habitat for Humanity of New Castle County where she supported their first major capital campaign for affordable housing investments in Wilmington, and the establishment of the first Habitat ReStore.

Joanne has a BA in Studio Art/ Fine Arts from Arizona State University and has earned advanced certifications in fundraising and Planned Giving.  A Delaware County, PA native, Joanne spent her formative years in nature exploring the creeks and woodlands of the Delaware River Watershed.  Joanne enjoys gardening and hand-building clay pots inspired by textures and colors found in nature. She resides in North Wilmington with her husband and two children.


Phone:302-658-6262 x101

Director of Advancement

Marcia Stephenson

Email: mstephenson@thedch.org
Phone: (302) 658-6262 ext. 105

As Director of Advancement, Marcia Stephenson leads and advances the organization’s donor engagement, fundraising, and philanthropic initiatives. She leads a team responsible for the full range of advancement activities for DCH with a primary focus on strategic outreach and stewardship of individual, foundation, corporate, and governmental relationships. Having been with DCH for more than 16 years, Marcia previously served as the Member-Donor Relations Manager. In that role, she grew DCH’s membership and donor base and increased volunteer involvement throughout all aspects of the organization while managing major fundraising drives, including our Annual Appeals, and coordinating large-scale aspects of our Rare Plant Auction®. Marcia holds a B.S. in Horticulture with a minor in Art from the University of Delaware.

Tel::(302) 658-6262 ext. 105


Director of Programs

Sue Wyndham

Email: swyndham@thedch.org

As Director of Programs, Sue Wyndham leads the programming team in their activities related to advancing DCH’s educational, community outreach, and greening initiatives. With training and experience in the fields of landscape architecture, horticulture, and psychology,  Sue has spent her career working within a variety of professional settings, advocating for the improvement of outdoor spaces through design, collaboration, and the promotion of environmental literacy and stewardship. In her spare time, she enjoys a wide variety of outdoor activities, personal gardening, reading, drawing, and time with friends, family, and pets. A graduate of Longwood Gardens’ Professional Horticulture Program, Sue is also a registered landscape architect with an MLA from SUNY-ESF, and a BA from the University of Delaware.

Grants Manager

Nina Groop

Email: ngroop@thedch.org   Phone: 302-658-6262 Ext. 104

As the Grants Manager, Nina Groop is responsible for researching, writing, and tracking all grant opportunities and awards as well as facilitating meetings with current and prospective funders. Nina has a B.A. in communications from American University and over 25 years of experience as an editor and writer. In her spare time, she enjoys reading, writing, hiking, spending time with friends and family, and telling stories at Moth StorySlams. 




Phone:302-658-6262 Ext. 104

Communications Manager

Caitlyn Ridgley

Email: cridgley@thedch.org   Phone: 302-658-6262 Ext. 107

As Communications Manager, Caitlyn uses her talent of the written and visual word to promote DCH’s programs, events, and campus across print and digital channels. She is a graduate of Temple University with a B.A. in Advertising Art Direction and brings over 8 years of marketing and public relations experience representing multi-million-dollar brands. She joins DCH with her love of plants, the outdoors, and helping others.




Phone:302-658-6262 Ext. 107

Office & HR Manager

Lauren Sawin

Email: lsawin@thedch.org
Phone: (302) 658-6262 ext. 100

As Office & HR Manager, Lauren provides support to the Executive Director and other staff in coordinating administrative, office, and HR services to ensure the smooth administrative function of the organization. She also serves as DCH’s receptionist.  Lauren is an SHRM-CP certified HR professional.

Tel::(302) 658-6262 ext. 100


Community Forester

Rachel Sten

Email: rsten@thedch.org   Phone: 302-658-6262 Ext. 112

As Community Forester, Rachel leads the tree-related work within the Programs Department, but also works with our Advancement team and Education Department to identify tree-planting opportunities throughout Delaware, while engaging the community in planting hundreds of trees per year in public spaces, schoolyards, and parks. When not leading tree-planting projects, she teaches general tree care and tree identification to groups of all ages. Rachel’s goal is simple: More trees in the ground! A lifelong love of horticulture led her to volunteer with her local Shade Tree Commission in Delaware County, PA, for nearly a decade, and she is thrilled to be able to strive for this goal professionally at DCH. Rachel holds a B.S. in Graphic Design from Drexel University, is a PHS Tree Tender Leader, and a Pennsylvania Forest Steward. When Rachel is not at DCH, she is likely to be found gardening, playing with her kids, camping and hiking with her family, or building something in her home woodshop.




Phone:302-658-6262 Ext. 112

Education Manager

Sarah Bett

Email: sbett@thedch.org   Phone: 302-658-6262 Ext. 117

As the Education Manager, Sarah Bett is responsible for developing youth and adult education programs as well as overseeing the Branches to Chances® return to work program. Sarah has a great deal of experience with engaging folks in outdoor spaces and developing educational programs. She is a graduate of the Pennsylvania State University with a B.S. in Community, Environment, and Development and a B.A. in Spanish. In her spare time, Sarah enjoys hiking, camping, gardening, and cooking.




Phone:302-658-6262 Ext. 117

Membership and Volunteer Manager

Elizabeth Davison, CVA

Email: edavison@thedch.org
Phone: (302) 658-6262 ext. 108

As the Membership and Volunteer Manager, Elizabeth (Liz) Davison, CVA supports the Advancement Department by engaging volunteers and members, organizing events, and maintaining DCH’s extensive membership and volunteer databases. Liz has a background in customer service and volunteer coordination, where she put her passions for people and the environment to work engaging communities to improve public lands. She holds a B.S. in Natural Resources Management from SUNY-College of Environmental Science & Forestry. In her free time, Liz enjoys hiking, reading, cross-stitching, and spending time with her husband and their cat.


Phone:302-658-6262 ext. 108

Horticulture Manager

Olivia DiFilippo

Email: odifilippo@thedch.org   Phone: 302-658-6262 x 114

As the Horticulture Manager, Olivia oversees the DRCC team, urban landscape sites, and the DCH grounds. Born and raised in Wilmington, Olivia is a neighbor of DCH and looks forward to connecting with her community. She holds a bachelor’s degree in Fine Arts from the Pennsylvania College of Art and Design, and has a background in native greenhouse and nursery production, and education. When she isn’t working with plants, Olivia enjoys creating mixed-media sculpture, going on adventures with her partner, and spending time with her cat, Chelone. Her passions include teaching self-sustainability techniques, fighting for climate justice, and creating an inclusive environment for Wilmington. Olivia hopes to empower folks through urban landscapes, public art, and cultivating meaningful community relationships.


Phone:302-658-6262 x 114

Branches to Chances® Program Coordinator

Bonnie Swan

Email: bswan@thedch.org   Phone: 302-658-6262 x 113

Bonnie coordinates the Branches to Chances® and Delaware River Climate Corps programs, develops curriculum, and teaches horticulture and climate-related topics to team members and trainees. She has a M.S. in Public Horticulture from the Longwood Graduate Program and has worked with the DCH as a volunteer and employee.  Bonnie is an avid gardener, growing vegetables and ornamental plants at home.


Phone:302-658-6262 x 113

Branches to Chances® and Facilities Coordinator

Robert Harris

Email: rharris@thedch.org
Phone: (302) 658-6262 ext. 118

Bob oversees DCH’s facilities and Branches to Chances® program. He majored in Fire Science at City College in California and worked as a city firefighter for over 10 years before joining his family’s fire protection maintenance business. In addition to his work in Public Landscapes, Bob has worked with the Urban Agriculture program in building raised beds and maintaining the farm property, with Community Forestry in planting hundreds of trees, and with the Education program by supervising and mentoring Branches to Chances trainees over the years.

Tel::(302) 658-6262 ext. 118


DRCC Team Member

Luther Banner

Luther is a graduate of the 2023 Branches to Chances Program and upon completion of the program, has become a crucial member of the Delaware River Climate Corps (DRCC). Luther starts each day rearing to get out into the public landscapes. Be it weeding, planting, or watering, he’s ready to complete the task on hand!

Public Landscapes Site Manager

Ray Taylor

Ray is a graduate of the Branches to Chances Program and has been with DCH ever since graduating in 2017, working as a key member of the Public Landscapes team. Ray enjoys working with, guiding, and mentoring the crew, running equipment, and keeping our landscapes in top shape! He can also be found around the DCH grounds doing whatever it takes to keep things looking great.

Public Ally

Lauren Royer

Email: lroyer@thedch.org

Lauren is joining the DCH team as this year’s AmeriCorps Public Ally. She is a recent college graduate from Pennsylvania State University, with a degree in criminology. She has a deep passion for plants and nature, due to working in her grandparents greenhouse when she was younger. She has fallen in love with plants and found that it has truly helped her mental health and wellness. Lauren also loves soccer and baseball, a true fan of the Philadelphia Phillies. Lauren loves spending time with her family and friends. She also has an emotional support animal, a dog named Tobie, who she takes with her to many adventures. Lauren is eager to get started with DCH and looks forward to seeing the power of plants in action.  



Urban Farm Coordinator

Adrienne Spencer

Email: aspencer@thedch.org
Phone: (302) 658-6262 ext. 106

Adrienne plans and implements the production, sale, and marketing of fresh vegetables and fruits at DCH’s E. D. Robinson Urban Farm at 12th & Brandywine, interacting with visitors and customers at the farmer’s market. She holds a B.S. in Communications from Howard University and is a longtime Wilmington resident. Adrienne is a  member of  PASA (Pennsylvania Association for Sustainable Agriculture) and the 2016 Recipient of the Nancy Caroon Travel Scholarship.

Tel::(302) 658-6262 ext. 106


Special Events Coordinator

Erica Razze

Email: erazze@thedch.org
Phone: (302) 658-6262 ext. 110

As Special Events Coordinator, Erica Razze is the primary contact for all facility rentals at DCH, including private parties, corporate events and retreats, and weddings. In her role, Erica oversees the scheduling, catering, and facility coordination for all DCH rental space from our larger meeting spaces to the gardens on the grounds. Erica brings expert event coordination knowledge to DCH, planning events for multiple private and corporate clients over the past decade. She has worked extensively with DCH in the past as the Catering Director at Toscana. She holds a B.S. in business from Philadelphia University.

Tel::(302) 658-6262 ext. 110


Board of Directors

Council of Advisors

Public Policy and Partnerships

Partnerships and collaborations are cornerstones of DCH’s work to achieve collective impact. As a regional leader in public greening, DCH is a dedicated advocate for creating healthier communities through the power of plants and bringing partners together to address multi-faceted issues in a comprehensive manner. Our partners are diverse and far-reaching and reflect the various aspects of our organization. We work with governments, private corporations, local schools, city residents, and civic organizations to grow a stronger, more beautiful city, county, and state. In each instance, our goal is to creatively connect people to solve ecological problems through the broad world of public horticulture.

Job Opportunities

Thank you for your interest in DCH employment. We recognize the advantages of a diverse workforce through the commitment to equal employment opportunities. DCH is dedicated to principles of equal opportunity employment without regard to race, religion, color, age, disability, sexual orientation, or national origin.

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