Since the creation of the Arboretum School under Laura Leggett Barnes in 1940, experienced instructors integrate classroom lectures, field study, hands-on practice, and visits to other gardens in this comprehensive program incorporating science, design, and plant knowledge.

Upon successful completion of the three-year program, which meets one day per week (first year is taught on Mondays, second year on Tuesdays, and third year on Wednesdays), students receive a certificate of merit in horticulture and 8 PCH CEUs; students and graduates may elect to sit for the Pennsylvania Certified Horticulturist exam.

Watch testimonials of students in the Barnes Horticulture Education Program.

Workshops and Lectures

Workshops include Focus on Flowers, Make More Plants: Propagation Workshop and Contemporary Botanical Illustration. Learn more

Certificate program

Our three-year certificate program takes a comprehensive approach to horticultural science, methods, and design. Learn more


Frequently asked questions about the Horticulture Certificate Program the Barnes Arboretum. Learn more

Living Collection

Learn more about the history of the Arboretum and discover the thousands of woody plants and trees found in our gardens.