
Older neighborhoods throughout Boulder carry some of the densest tree canopy along the entire Front Range. Mature silver maples, Siberian elms, and cottonwoods shade historic properties from Mapleton Hill through Chautauqua, but that same canopy creates ongoing maintenance demands. Heavy wet spring snowstorms load leafing branches until they snap, sending limbs onto rooftops, vehicles, and power lines. Chinook wind events compound the issue by stressing root plates in shallow soils. Properties near the foothills face additional wildfire fuel concerns, making selective thinning and defensible space planning a necessary part of responsible tree ownership on the western edge of town.
Emerald ash borer continues to spread through Boulder County, threatening ash trees that line many residential streets and parks. Without proactive trunk injection, healthy ash canopy worth thousands in property value can decline beyond recovery within a few seasons. Alkaline clay soils across much of the city also contribute to iron chlorosis in susceptible species, causing yellowed foliage and progressive decline. Managing these overlapping pressures requires understanding how elevation, soil chemistry, and weather patterns interact on each individual lot. Addressing tree health early preserves shade, structural integrity, and the long-term value of the surrounding landscape.
Crown thinning and deadwood removal keep Boulder's large deciduous trees from becoming liabilities during spring snow events. Mature cottonwoods and silver maples develop heavy lateral limbs that accumulate wet snow faster than the branch structure can support, and proper pruning reduces that loading without stripping the canopy. Structural pruning on younger trees corrects codominant stems and weak crotch angles early, preventing the kind of splitting failures that require emergency response later. Every cut follows ANSI A300 standards to promote proper wound closure and long-term branch architecture suited to the wind and snow conditions along the Front Range.
When a mature elm or cottonwood fails during a Chinook event or an overnight snow load, the resulting damage can block driveways, rest on rooflines, or contact overhead utility lines. Safe removal in those conditions demands rigging techniques and equipment capable of handling large-diameter wood in confined spaces between structures. Planned removals on Boulder properties often involve trees growing close to foundations, fences, or neighboring structures where directional felling is not an option. Stump grinding follows every removal, with depth adjusted based on whether the site will be replanted, graded for turf, or incorporated into a landscape renovation.
Ash trees throughout Boulder are under active threat from emerald ash borer, confirmed in the region and steadily expanding its reach. Trunk injection delivers systemic insecticide directly into the vascular system, protecting the tree for approximately two years per treatment cycle. Early intervention while the canopy retains more than half its foliage gives the best chance of long-term preservation. Untreated ash trees often progress from initial crown thinning to complete structural failure within five to seven years. Identifying infestation signs such as D-shaped exit holes, serpentine larval galleries, and increased woodpecker activity allows treatment to begin before the damage becomes irreversible.
Our Longmont tree service team provides comprehensive tree care solutions for residential and commercial properties throughout Boulder County. From routine maintenance and emergency response to specialized treatments and land clearing, every service is performed by licensed professionals following ISA best practices. Explore our full range of tree care services below.
Frequently Asked Questions
Tree Service can be complex, and we’re here to provide answers to common questions. Here are some frequently asked questions from our clients.
Tree trimming costs in Longmont typically range from $200 to $1,800 depending on the tree species, height, number of branches requiring work, and accessibility. Cottonwoods and mature elms along the St. Vrain corridor often fall on the higher end due to their size. We provide free on-site estimates so you know exactly what to expect before any work begins.
Longmont requires all tree contractors performing work aloft to hold a City of Longmont Tree Contractor License under Municipal Code Chapter 6.88. Licensed contractors must carry $1,000,000 in general liability insurance and employ at least one ISA Certified Arborist. Always ask for proof of licensing before hiring anyone to work on your trees.
The best time to trim most trees in Longmont is during late fall through early spring while they are dormant. This reduces stress on the tree and minimizes disease transmission risk. However, dead or hazardous branches should be removed immediately regardless of season. Spring-flowering trees like crabapples are best pruned right after they bloom.
Signs your tree may need removal include large dead branches in the crown, significant trunk decay or cavities, visible fungal growth at the base, severe lean that has changed recently, root heaving, and major structural cracks. If more than 50 percent of the crown is dead or damaged, removal is usually more practical than attempting to save the tree.
Emerald ash borer was confirmed in Longmont in 2016 and now threatens every ash tree in the city. Treatment with trunk injection is most effective when started before significant canopy loss occurs. The City of Longmont Forestry Services maintains a public ash tree map and encourages private property owners to consult with a licensed tree contractor about treatment options.
After the 2021 Marshall Fire destroyed over 1,100 homes in Boulder County, wildfire mitigation became essential for properties near the foothills. Creating defensible space involves thinning trees, removing ladder fuels, and maintaining clearance zones around structures. Boulder County homeowners may qualify for 50 percent cost sharing through the Wildfire Partners program.
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We pride ourselves on delivering great results and experiences for each client. Hear directly from home and business owners who’ve trusted us with their Tree Service needs.

They removed a massive dead cottonwood that was leaning toward our garage after the spring snowstorm. The crew was professional, careful with our landscaping, and cleaned everything up perfectly. Best tree service experience we have had in Longmont.
— Longmont Homeowner

We hired them to treat our two large ash trees for emerald ash borer. They explained the treatment process clearly, answered all our questions, and followed up to check on the trees afterward. Very knowledgeable and honest about what our trees actually needed.
— Boulder County Resident

Called for emergency service after a wind event dropped a huge branch across our driveway. They responded the same day and had everything cleared within a couple hours. Fair price, great crew, and they even gave us recommendations for preventing future issues.
— Longmont Property Owner
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