Shade Tree Program Phone: 603-589-3370 In an effort to promote the planting of shade trees in the City of Nashua, to contribute to the community's effort toward beautification, and to reduce the effects of Global Warming, the applicant agrees to cooperate with the City in a joint venture to plant trees. The Shade Tree program was established to provide Shade Trees to Nashua homeowners at a low cost and to provide free trees to qualifying homeowners in inner city areas. Applications can be obtained through the Park-Recreation department.