Kwesi Joseph

Urban Gardens Specialist

cell 718-809-2781
email Kwesi

Areas of Interest
project management, garden design, rock dust, biochar, soil health and plant nutrient density

Kwesi Joseph helps communities across New York City's five boroughs grow healthy food and care for urban green spaces. With Cornell Cooperative Extension's Harvest New York team, he works with community gardeners, urban farmers, and educators to improve soil health, increase plant nutrient density, and tackle challenges in vegetable production.

Kwesi works with natural processes like soil remineralization, no-till gardening, and carbon sequestration. He conducted a trial using rock dust to boost soil fertility and carbon sequestration, and is developing a biochar project with Cornell faculty and community gardeners.

A Master Composter since 2016, Kwesi spent six years as the Compost Manager at the Hattie Carthan Community Garden in Brooklyn, where he ran workshops, processed food scraps, and trained volunteers. He has partnered with the Action Research Collaborative (ARC), Cornell University Cooperative Extension (CUCE), the College of Agriculture and Life Sciences (CALS), Cornell's College of Architecture, Art, and Planning (AAP), and the Expanded Food and Nutrition Education Program (EFNEP) to expand gardening, nutrition education, and land use projects for families in transitional housing and underserved neighborhoods.

His work has appeared on NY1, The Weather Channel, and WNYC Radio, and been covered by Gothamist and the Queens Ledger.

Kwesi holds a B.S. in Geology from York College, The City University of New York, an Executive MBA from Cornell's Johnson School of Business, and a Master Composter Certificate from the Brooklyn Botanic Garden Compost Project.

Urban Ag Food Safety Webinar

March 11, 2026
12:00 pm - 1:30 pm

Urban and small-scale producers are encouraged to join us for the Urban Ag Food Safety webinar, featuring speakers from Cornell Cooperative Extension and Cornell IPM. We will explore the 'why' behind food safety, providing a basic overview and diving into specific urban ag considerations including water, pest, rodent, and soil health challenges. We will touch on the regulation and marketing landscape, and share resources for learning more. Bring your questions!

Companion Planting in the Garden -- With Mushrooms!

March 12, 2026
10:00 am - 11:30 am

Learn how to diversify your garden harvest with companion planting at this virtual workshop. Plan next spring's garden with guidance CCE Harvest NY Urban Agriculture Specialist Yolanda Gonzalez on growing three different types of mushrooms.

2026 Rochester Urban Agriculture Conference

March 21, 2026
9:00 am - 4:00 pm
Rochester, NY

Join us for our annual Rochester Urban Agriculture Conference, a day of learning and connections featuring interactive workshops, community knowledge sharing, Fruition's Gift of Seed Experience, horticulture tables and displays, and more!

Community Gardens Soil Testing Program Accepting Applications

Soil testing supports the growth and expansion of community gardens by protecting the health and safety of the food produced in these gardens. CCE Harvest NY, in partnership with the NYS Department of Agriculture & Markets (AGM) and the Cornell Soil Health Lab, is offering eligible, food-producing gardens in New York State the opportunity to send soil samples for testing without charge.

The soil test will analyze samples for heavy metals and nutrient levels. Test results help gardeners make appropriate plans to produce high quality fruits, vegetables, and flowers. Technical support and education for participating growers will be available from the CCE Harvest New York team. Learn more about the 2026 Community Gardens Soil Testing Program.

2025 Year in Review

2025 was another year of growth and accomplishment for CCE Harvest NY! Our 2025 Year in Review highlights our impacts and details our work.