Newsletter for the Washington Park Arboretum, a public park in Seattle on the shores of Lake Washington, which is managed by the University of Washington Botanic Gardens and the City of Seattle. The monthly newsletter, which later changed to a bi-monthly in 2001 and then quarterly format in 2008, focused on Arboretum news, plant sales, fundraisers, calendars of events and gardening tips.

Holdings begin with the Washington Park Arboretum (1985-1987), continuing with the Washington Park Arboretum Newsletter (1987-1988) and Washington Park Arboretum Foundation Newsletter (1988-1995), and concluding with Ground Work (1995-1997, 2001-2010).