PNPP was established in 1988 as a means of providing a consistent match of Providence Parks Department funds for the continued planting of street trees in Providence at a grassroots level. Since then, PNPP has co-funded the planting of nearly 10,270 street trees through the efforts of over 620 neighborhood groups. This effort has helped Providence to bridge the deficit of tree plantings. A 2006 Street Tree Tally found 25,000 street trees in Providence, a population consisting of 95 different species. Each spring and fall, PNPP plants an average of 450 to 500 trees per year with homeowners, volunteers, community groups, the City Forester and his staff.