Portland’s oldest trees are irreplaceable. A certified arborist can tell you which ones can be saved.

ISA Certified. We diagnose first. We recommend removal only when nothing else makes sense.

The trees in Portland’s older neighborhoods have been growing for a century. They define the streets. They shade the yards. They are part of what makes Munjoy Hill and the West End and Deering Center look the way they do.

They are also under pressure. Emerald Ash Borer is moving through Cumberland County. Dutch Elm Disease continues to threaten Portland’s surviving elms. Coastal conditions — salt air, periodic storm stress, drainage conditions unique to Maine’s geography — create stressors that inland trees don’t face.

An ISA Certified Arborist can distinguish a tree that’s dying from a tree that’s stressed. A tree that needs to come down from a tree that can be treated. A tree that justifies the investment from one that doesn’t.

We assess tree health and manage disease in Portland’s urban canopy. The answer isn’t always removal.

What’s affecting Cumberland County’s trees

**Emerald Ash Borer (EAB)**

EAB has moved aggressively through Maine, and Cumberland County is no exception. White ash throughout Portland, South Portland, and Westbrook is at risk. The beetle’s larvae destroy the vascular system beneath the bark, killing trees from the top down.

Early indicators: canopy thinning that starts at the crown tips, epicormic sprouting along the trunk and major limbs, distinctive S-shaped galleries under the bark, and heavy woodpecker foraging activity. Trees detected early — before 30–40% canopy loss — are candidates for treatment. Beyond that threshold, removal is the correct call.

We assess EAB status. We don’t recommend removal for trees that can be treated, and we don’t recommend treatment for trees that are past saving.

**Dutch Elm Disease**

Portland’s surviving American elms are among its most historically significant trees. Dutch Elm Disease is caused by a fungus spread by elm bark beetles. It presents as wilting and yellowing in individual branches, typically starting in one section of the crown. Cross-sections of infected wood show characteristic dark vascular staining.

Preventive fungicide injection protects high-value elms. Early intervention when infection is detected can save a tree. We assess, advise, and treat where it makes sense.

**Coastal and Urban Tree Stress**

Portland’s proximity to the ocean creates specific conditions — salt spray damage on coastal-facing properties, periodic flooding from storm surge and heavy rain, and soil conditions affected by decades of urban development. Coastal stress presents as marginal leaf scorch, reduced shoot growth, and gradual canopy decline that can be addressed if identified early.

Soil compaction from foot traffic and paving affects root zones throughout Portland’s older neighborhoods. Vertical mulching and aeration can restore root function in trees that have lost vigor without visible disease.

**Root Rot and Decay**

Older Portland properties sometimes have drainage conditions that promote fungal root rot — Armillaria and related organisms that colonize root systems and advance into the trunk base. We assess basal decay and advise on whether the structural integrity of the tree still justifies retention.

What removal actually costs over time

A mature sugar maple or American elm on a Portland property has real financial value — not just as a landscape feature but as a measurable contributor to property value and energy efficiency. Studies consistently show that large, healthy trees increase adjacent property values.

A nursery tree planted to replace a removed mature tree takes decades to approach comparable canopy coverage. Treatment that preserves a 60-year-old tree for another 20 years returns that investment many times over.

We tell you honestly when a tree is past saving. We also tell you honestly when it isn’t — because the recommendation to remove a tree that can be treated doesn’t serve you.

Portland, South Portland, and Westbrook

We provide tree health assessments and disease management throughout our service area. If you’re nearby and unsure, call us.

Concerned about a tree on your property?

Call for a free assessment with a certified arborist.

Or fill out the short form and we’ll reach out within one business day.