Science and Conservation

PHA Receives Highest Accreditation for a Second Time

The Polly Hill Arboretum has been awarded a Level IV Accreditation by The ArbNet Arboretum Accreditation Program and The Morton Arboretum. ArbNet is the only global initiative to officially recognize arboreta at various levels of development, capacity, and professionalism. PHA is also recognized as an accredited arboretum in the Morton Register of Arboreta, a database […]

A Note from PHA Executive Director Tim Boland

A note to PHA members and friends: We hope you and your loved ones are safe and healthy. We believe that in these uncertain times, community is more important than ever! The PHA staff and Board of Directors are all engaged in the good work of keeping the Arboretum vital and accessible to our Island visitors […]

Polly Hill Arboretum Again Achieves Highest Accreditation

This past February we received wonderful news: PHA had again achieved a level IV rating, the highest available, from the Arbnet Arboretum Accreditation Program in recognition of our commitment to the health and diversity of our trees. Level IV has been achieved by only 10 percent of botanic gardens and arboreta participating in Arbnet’s program […]

Experimenting with Stewartia Propagation

Polly Hill was devoted to horticultural experimentation and raising plants from seed. She also named many of her favorite plants, including several cultivars (cultivated varieties) of stewartia. To get an exact duplicate (a genetic clone) of a plant, it must propagated asexually, which eliminates the genetic variability found in seed propagation.

Summer Review and Looking Ahead

Attendance was lively at our annual summer lecture series held in the Far Barn. Our summer evening lecture series allows us to bring leading figures in horticulture, science, and garden design from around the world to share new ideas with PHA members and the Vineyard community. The major theme of this past summer’s programs was […]

PHA’s Stewartia Collection: Patience, Persistence, Pride

Our commitment to building PHA’s stewartia collection is based on our founder Polly Hill’s history with the genus and our own desire to encourage the cultivation of these superb small-flowering trees in home gardens. As part of our mission of research and horticultural experimentation, we also bring a plant conservation focus to stewartias, particularly the […]