Thankful Arnold House Museum
Thankful Arnold House Museum

Thankful Arnold House Museum

14 Hayden Hill Road

Haddam, CT 06438 | 860.345.2400

Museum Open Year Round:

Wednesday 9 am – 3 pm; Thursday 2-8 pm; Friday 12-3 pm

Memorial Day to Columbus Day:

Sunday, 1-4 pm

Also open by appointment.

The garden is free to enjoy during daylight hours for self-guided tours.


Wilhelmina Ann Arnold Barnhart Memorial Garden

Named after a direct descendent of Joseph and Thankful Arnold, the original garden was designed and dedicated in 1973. The garden was given in memory of Wilhelmina Ann Arnold Barnhart by her father Isaac Arnold, the benefactor of the Thankful Arnold House. The original garden design was created by Sally Marvin of Bloomfield, Connecticut and featured an orchard, berry beds and bench garden.


The gardens were redesigned in the late 1980s in the Colonial Revival style with granite-edged beds and gravel paths. In 2000 the Connecticut Herb Study Group conducted extensive research to select plants commonly grown in household gardens in the lower Connecticut River Valley in about 1830. Most of the garden is now devoted to herbs used for cooking, medicine, dyeing, fragrance and other household uses, with a small bed featuring vegetables common in gardens in the early 1800s and a few old-fashioned annuals. Over 50 varieties of herbs are planted in the garden, including many of the ones Thankful Arnold would have used in about 1830. Although Thankful’s garden would have been larger and simpler in design, the garden is an informative, pleasant, relaxing place for visitors. The garden, which has been recognized by the National Home Gardening Club, was featured in the summer 2003 issue of People, Places and Plants magazine.


For admission information and directions, visit


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