The Rockingham County Botanical Garden is a 10-acre (4 ha) botanical garden at 113B North Road, Brentwood, New Hampshire, USA. At present, the garden is open to the public only on Thursday mornings, 9 a.m. until noon, between April 1 and October 15.
The garden began in 1996 as an idea of the University of New Hampshire Cooperative Extension Master Gardeners in Rockingham County. In subsequent years, the group has obtained 10 acres (40,000 m2) of county land, formed a nonprofit organization, and begun to develop the garden.