Tree Care in Boston, Massachusetts
Boston's trees live in some of the oldest urban ground in America — from the elms of the Common (survivors and replacements from the Dutch elm disease era) to the oaks, maples, and lindens lining triple-decker streets in Dorchester and JP, to the Emerald Necklace's Olmsted-designed woodlands. It's Zone 6b, coastal: nor'easters, salt spray and road salt, heavy wet snow, and cramped root space define the job here.
Public shade trees are protected by state law
Massachusetts is distinctive: under Chapter 87 of the General Laws, "public shade trees" — essentially trees within a public way — can't be removed without a public hearing held by the tree warden. Every Massachusetts city and town has a tree warden; in Boston that authority sits with the city's forestry operation. Practical upshot: the tree at your curb likely isn't yours to prune or remove, even if you planted it. Request work through Boston 311 rather than hiring a crew directly for a street tree.
The pest picture
Boston dodged a bullet when the Asian longhorned beetle outbreak in Worcester was contained — but that's why you should still report any large black-and-white-spotted beetle with long antennae. Winter moth, which defoliated New England maples and oaks for two decades, has collapsed since the release of a parasitoid fly, though older trees still carry that accumulated stress. Current watch list: emerald ash borer (established in Massachusetts), hemlock woolly adelgid in the region's hemlocks, and spongy moth in outbreak years.
Coastal realities
Salt — from the road and the harbor — burns foliage and degrades soil along exposed streets; salt-tolerant species like honeylocust, London plane, and red oak hold up best. Wet heavy snow and nor'easter winds make structural pruning on mature trees genuinely protective: the failures every storm season are overwhelmingly co-dominant stems and overextended limbs that a good arborist would have flagged.
Old trees, small spaces
Much of Boston's canopy is mature trees in tiny soil volumes. The kindest things you can do are boring: mulch instead of turf over the roots, no soil piled against trunks, water in drought, and don't trench utilities through a root zone without talking to an arborist first.