CountyCumberland County
RegionSouthern Maine
EAB quarantineEntire county
Hemlock woolly adelgidEstablished
Tree Medics protects trees for homeowners, businesses and municipalities in Windham and across Cumberland County. We diagnose tree problems and treat the insects and diseases threatening Southern Maine’s trees, from emerald ash borer to browntail moth.
What’s threatening trees in Windham
Emerald ash borerAll of Cumberland County is inside Maine’s emerald ash borer quarantine.[1] In 2026, ash dieback and mortality were reported throughout southern Maine.[2]
Hemlock woolly adelgidAs of December 2024, the Maine Forest Service lists it as established in Windham.[3]
Browntail mothFound in all 16 Maine counties, and its toxic hairs stay in the environment for up to three years.[4] In 2026, Maine CDC reported higher browntail moth populations in parts of Cumberland County, along with parts of Androscoggin, Hancock and Oxford counties, even as populations statewide have been steadily decreasing over the past couple of years.[5] The Maine Forest Service’s 2026 aerial survey found localized defoliation mainly along the western shores of Sebago Lake.[2]
Beech leaf diseaseNow found in all 16 Maine counties.[6]
About Windham’s trees
Local landscapeWindham’s 308-acre Lowell Preserve, given to the town by Virginia Lowell in 1999, is forested mostly with hemlock, maple and beech and contains 12 significant hemlock stands used as deer habitat.[7]
Community treesWindham’s forest management plan for the Lowell Preserve was prepared by a forester for $2,900, with half the cost covered by a state Project Canopy grant.[8]
Local landscapeLowell Preserve is co-managed by the Town of Windham and the Presumpscot Regional Land Trust, with nearly 6 miles of trails through hemlock-dominated areas and beech, maple and oak woods along McIntosh Brook.[9]
Local landscapeWith the East Windham Conservation Area protected in September 2023, the town-owned conservation lands there and at Lowell Preserve total 1,104 acres of hilly hardwood forest, with views of Little Duck Pond and the White Mountains.[10]
Local landscapeBlack Brook Preserve, a 105-acre land trust property in Windham, protects mature forest and forested wetland at the source of Black Brook, which flows about six miles to the Presumpscot River.[11]
Local landscapeWindham had a population of 18,434 in the 2020 Census and covers about 46.58 square miles of land.[12]
Tree care services in Windham
Emerald Ash Borer
Trunk injections that protect ash trees from emerald ash borer.
Emerald Ash Borer in Windham
Hemlock Woolly Adelgid
Systemic treatment to keep hemlocks healthy.
Hemlock Woolly Adelgid in Windham
Tree Health Assessments
Find out what’s wrong with a tree and what to do about it.
About tree health assessmentsBrowntail moth season starts in your trees right now.
From October to March, young browntail moth caterpillars overwinter in silk webs at the tips of branches. The Maine Forest Service recommends clipping and destroying webs within reach between mid-December and early April.[13] Browntail moth help in Windham.
A year of tree care in Windham
- WinterClip browntail moth webs, assess trees while branches are bare, and plan spring treatments.
- SpringTrunk injections for ash trees after leaf-out, and browntail moth treatment before caterpillars feed.
- SummerWatch for thinning crowns on ash and early leaf drop. Check beech leaves for dark bands between the veins.
- FallLook for white woolly masses on hemlock twigs, and spot new browntail webs once leaves drop.
Nearby towns we serve
Sources
- Maine Forest Service: EAB found in seven more Maine towns, with York and Cumberland counties under quarantine (2020)
- Maine Forest Service: Forest & shade tree conditions, August 2026
- Maine Forest Service: Hemlock woolly adelgid overview and distribution
- Maine CDC & Maine Forest Service: Browntail moth hairs pose risk during spring outdoor activities
- Maine CDC Health Advisory: Browntail moth (May 2026)
- Maine Forest Service: Forest & shade tree conditions, September 2026
- Portland Press Herald: Windham considers harvesting Lowell Preserve timber (2011)
- Portland Press Herald: Windham considers harvesting Lowell Preserve timber (2011)
- Presumpscot Regional Land Trust: Lowell Preserve (2024)
- Presumpscot Regional Land Trust: East Windham Conservation Area + Lowell Preserve (2023)
- Presumpscot Regional Land Trust: Black Brook Preserve (2024)
- U.S. Census Bureau: QuickFacts, Windham town, Maine (2020)
- Maine Forest Service: Browntail moth management overview