Adult Education

The Arnold Arboretum of Harvard University is a community resource for education, offering a variety of learning opportunities including lectures, classes, workshops, and tours of our living collections and historical landscape. Join us as we explore the biology and horticulture of woody plants, and delve into topics related to Earth’s biodiversity and evolutionary history, the environment, conservation biology, and key social issues associated with current science.

Featured Programs

Pruning in Winter

Jen Kettell, Horticultural Educator and Consultant
1 Session: Saturday, January 28, 9:00am–12:00noon
Location: Hunnewell Building
Jen Kettell, an ISA-certified arborist, will explain the reasons for pruning and what to consider when pruning dormant trees, shrubs, and vines. She will demonstrate techniques, give guidelines for determining which plants benefit from winter pruning, and explain how plants heal from pruning wounds. Note: this workshop teaches ornamental pruning techniques; it does not provide information on pruning for fruit production.
Fee $35 member, $48 nonmember Register »

Massachusetts Certified Arborist and International Society of Arboriculture CEUs available.


Landscape for Life

Mark Richardson

Mark Richardson, Director of Horticulture, New England Wild Flower Society
4 Sessions: Wednesdays, January 11, 18, 25, February 1, 1:00–4:00pm
Location: Hunnewell Building
This intensive introductory course will provide you with the knowledge, skills, and understanding to create a great-looking garden that is healthier for you and your family, and the environment. This class is based on the principles of the Sustainable Sites Initiative (, the nation’s first rating system for sustainable landscapes.
Fee $185 member, $218 nonmember Register »


The Hidden Half of Nature

David R. Montgomery, PhD, University of Washington, Earth and Space Sciences, and Ann Bikle, MLA, Biologist and Environmental Planner
Sunday, January 8, 2:00–3:30pm
Location: Hunnewell Building

From garden to gut, David R. Montgomery and Anne Biklé will present a new view of the tiniest creatures on Earth and how it is changing the way we see nature and ourselves. Through the twists and turns of history, science, and personal experience, they’ll reveal our tangled relationship with the microbial world, including the stunning similarities between what’s going on around the roots of plants and deep within the human gut.
Fee Free member and student, $10 nonmember
Register at or call 617.384.5277.