There are over 10,000 trees in Portsmouth that provide natural and historic character, filter environmental pollutants, aid in storm water runoff and filtration, provide wildlife habitat, provide screening, increase biodiversity and improve quality of life. Our arborists preserve the urban forest through tree preservation techniques, as well as yearly tree plantings and inventory management to maintain a diverse urban forest.

​​​​​​The purpose of the City Tree Grant Program is to increase the number of shade tree plantings in locations where planting within the right of way is not appropriate due to underground or overhead utilities, or lack of adequate space.

In 2017, the Trees and Greenery Committee suggested that it might be beneficial to have some type of tree maintenance trust fund created to accept donations from persons wishing to contribute funds for planting or maintenance of trees, public greenery, landscape or other aesthetic improvements in the City. If you are interested in donating, contact Corin Hallowell or Chuck Baxter at Public Works.

You can view the trust here. 

The City of Portsmouth’s Parks and Greenery Department maintains a tree inventory accounting for the city’s urban forest. This gives us accurate numbers on tree species and size citywide.

• Emerald Ash Borer
• Hemlock Woolly Adelgid
• Gypsy Moth Caterpillar
• Winter Moth Caterpillar
• Asian Longhorned Beetle