Comments associated with a public tree
The Public Works Department intervenes only on public trees. If you cannot find the tree on the map, please include your address in the message field. PLEASE NOTE: If you request an evaluation for work on trees near power lines, please contact Hydro Westmount Customer Service at 514 925-1414.
For permit application and submittal requirements, please consult the Urban Planning Department’s Permits, Licenses and Forms page.
For a list of permitted tree species for planting or replacement, please consult the list of suitable trees.
New by-law concerning tree felling
By-law 1494, which came into effect May 2, 2016, modified the requirement for the felling of trees.
City authorization for tree felling on private property is required in all cases, except if the tree is not more than 10 cm (4 in.) in diameter, when measured at a height of 1.5 m (5 ft.) from the ground.
In order to protect Westmount’s tree canopy, tree cutting is only authorized in the following circumstances, and after the issuance of a certificate of authorization for tree cutting:
- based on an arboriculturist’s report, the tree is dead or in a state of irreversible blight, with more than 50% of the crown consisting of dead wood;
- the tree is within the building site of a projected construction (structure or retaining wall) or within 3 meters of the building site of a projected construction (structure or retaining wall) – Please note that a building permit or landscaping certificate is a pre-requisite in this context;
- the tree is located within the building site of a swimming pool or, in the case of the front yard, within the building site of accessory parking or means of access to a building, but only if no other area is available elsewhere on the parcel of land for such construction – Please note that a building permit or landscaping certificate is a pre-requisite in this context;
- based on an arboriculturist’s report, the tree is likely to spread a disease or is an exotic invasive species and accordingly, must be replaced;
- based on an arboriculturalist’s report, if the tree represents a dangerous condition due to an irreversible situation resulting from a disease or structural deficiency affecting its solidity;
- If the tree causes serious damage to a property – Please note that the City may require a report signed by an engineer.
In all cases, the applicant must justify the request. To apply for a certificate of authorization, please go to the Urban Planning Department with the following documents:
- A letter from the building owner authorizing the certificate application, if the request is made by a third party;
- A letter from the association of co-owners authorizing the proposed modification, if applicable;
- A copy of a certificate of location indicating the location of the tree to be removed;
- A clear and colour photograph of the tree to be removed;
- An arboriculturist’s report, written and signed by an arborist (certification or diploma) or a landscape architect (AAPQ), if applicable;
- A report signed by an engineer, if applicable;
- A plan indicating the proposed replacement program (by an arborist or landscape architect), if applicable;
- A tree protection method for the surrounding trees, if applicable;
- A site plan showing existing and proposed landscaping, if applicable;
- An official cost estimate, excluding taxes, provided by a professional to intervene on said tree(s).
Certificates of authorization are subject to fees outlined in the Municipal tariffs bylaw.
For further information, please visit: https://westmount.org/en/construction-and-renovation/
In all cases, the applicant must justify the request. Please take note that the request may take up to two (2) weeks to process.
The property owner is responsible for the disposal of the branches and trunk of a felled tree.
Impacts of Japanese Knotweed
- it establishes easily and spreads quickly, creating dense growths that can disturb and degrade wildlife habitat
- it reduces plant biodiversity by outcompeting many indigenous plants because of its rapid growth, thick carpet of leaves and stems that form on the ground, and toxins released through its roots that prevent other plants from becoming established
- its vigorous roots, which can spread up to 10 metres laterally and 2 metres in depth, and are strong enough to pierce through asphalt and concrete
- its hardiness, which makes it flood-resistant and capable of colonizing degraded areas.
How to identify the plant
Although often mistaken for bamboo because of its appearance, Japanese Knotweed has the following characteristics:
- large oval leaves (3-6 inches long and 2-5 inches wide)
- round, reddish-purple hollow stems with bamboo-like knots
- very rapid growth, reaching between 1 and 3 metres in height
- small, greenish-white flowers that produce a small white fruit with wings that help disperse seeds
- brown, shiny seeds
- resistance to Canadian winters.
What you can do
Because the plant is very difficult to eradicate, avoid cultivating it in the first place. If it becomes established on your property, however:
- Do not mow it – mowing can cause it to spread, as it is capable of reproducing, even from tiny fragments
- If it is still small (i.e.: under 5 stems) get rid of it as early as possible by gently pulling out new growth by hand and repeating until fully removed. It is extremely important that you dispose of these pieces via either the municipal organic waste or inorganic waste (i.e.: garbage) services. Please do not add it to your home composting system. This is due to the fact that the large facilities that process municipal organic either generate sufficient heat via their compositing practices to kill the plant or use anaerobic digestion which also has the effect of destroying it.
- If the plant is well established (i.e.: more than 5 stems), please visit the Public Works department at 1 Béthune to obtain a pesticide application permit. We advise against excavating the plant and its root system as the likelihood of fragments remaining on site will lead to its reestablishment. We also advise against the use of atomized herbicide application to control the spread due to the negative environmental impact associated with spray drift. Thus, the permit will only be emitted following detailed city inspection and upon the presentation of an official proof that the applicator is certified for pesticide application according to the MDDELCC using a tracheid-targeted injection system (e.g.: JK1000). The ideal application time is between July and August. All stems must be injected and this must be done below the third node (see picture below for more information) otherwise the risk of spreading still remains.
Report its presence on public spaces
If you see Japanese knotweed anywhere in Westmount’s parks and public green spaces, please report it to the Public Works Department by using the Contact Us form, or by phoning 514 989-5213.
Emerald Ash Borer (Agrilus Planipennis)
The Emerald Ash Borer (EAB) is a highly destructive insect pest of ash trees. Native to eastern Asia, this pest was first discovered in Canada and the U.S. in 2002. The EAB has killed millions of ash trees in Southwestern Ontario, Michigan and surrounding states, and poses a major economic and environmental threat to urban and forested areas in both countries. The EAB attacks and kills all species of ash (except Mountain ash which is not a true ash).
How does the EAB spread?
While the EAB can fly up to several kilometres, another significant factor contributing to its spread is the movement of firewood, nursery stock, trees, logs, lumber, wood with bark attached and wood or bark chips.
Signs of infestation
Tree decline, including:
- thinning crown
- diminished density of leaves
- evidence of adult beetle feeding on leaves
- long shoots growing from the trunk or branches
- vertical cracks in the trunk
- small D-shaped emergence holes
- S-shaped tunnels under the bark filled with fine sawdust
“The project, led by the Service de l’environnement of Montréal,
consists in releasing natural enemies of the emerald ash borer (EAB).
Several thousand parasitoids will be released at different times
during the summer in some natural woodlots, such as Westmount’s
Summit Woods Green Space. This classical biological control project,
through the use of exotic natural enemies of the EAB, is a long-term
strategy for the conservation of natural woodlots in urban areas.”
Don’t move firewood
Transporting firewood can destroy millions of trees
Invasive insects and diseases can live in cut wood. Moving untreated firewood, even just a few kilometres to or from a campground or a cottage, is a common way for invasive insects and diseases to spread.
Trees – a collective heritage
Trees are an important part of Westmount’s character and history. From the time of the Iroquois, to the arrival of the French and British, to the present, the local landscape has been defined by its patchwork of charming paths and roads winding through the forested western slope of Mount Royal.
The word forest isn’t reserved only for expanses of trees in remote areas. An urban forest – sometimes called green infrastructure – is defined as all of the trees and other vegetation within a built-up area, both public and private. In a sea of grey infrastructure, trees represent a vital bridge between city dwellers and the natural world.
Originally composed of maples, birches, and elms, the local forest changed with the arrival of European settlers, who gradually introduced orchard trees and ornamentals, and later, some hardy species well suited to the rigours of an increasingly urban environment.
Westmount’s urban forest
Many of the trees in the City have an extensive history. As part of our shared heritage, these trees are treasures to preserve, particularly in today’s urban environment. All measures are taken to protect and care for these historic trees for as long as possible.
In addition to its management of public trees, Westmount encourages the planting of trees on private property. Each spring, it offers a limited number of young ornamental or fruit trees at no charge for residents that wish to plant them on their property.
Westmount’s contemporary urban forest, like many other North American cities, is composed primarily of Norway maple (Acer platanoides) varieties, many of them planted in the mid-20th century as a sturdy, fast-growing replacement for the rapid loss of American elms to Dutch elm disease.
MANAGING THE URBAN FOREST
The City is committed to the development of a proactive forest management strategy. Thanks to new technologies, leading-edge arboricultural practices, and science-based decision-making, Westmount’s urban forest is becoming healthier, safer, and more biologically diverse.
By planting ecologically-appropriate tree cultivars – the right tree in the right place – and by using best management practices (BMP), the City will ensure a vibrant urban forest for future generations.
Why tree removal is necessary
Westmount is committed to the ongoing observation, evaluation, and maintenance of its trees, replacing them when necessary to ensure a robust, abundant and biologically-diverse forest throughout its territory.
The typical life expectancy of an urban tree is 60 years. The majority of Westmount’s Norway maples, estimated to be between 60 to 80 years of age, are likely now in decline and many will reach the end of their lifespan within a short period. Pruning, cabling, and other maintenance techniques are used where appropriate to prolong the life of trees and ensure public safety. In many cases, however, felling is a better option to improve the biological and age diversity of the forest.
BENEFITS OF TREES IN OUR CITY
Urban forests provide crucial ecosystem services such as improved mental and physical health, improved air, water and soil quality, stormwater management, wildlife habitat, shade, and a reduction in the heat-island effect.
An aesthically-pleasing abundance of trees also provides economic value, contributing to higher property values and more successful business districts.
URBAN FOREST INTERVENTION
Evaluating the health of a tree is not a simple process; it involves specialized equipment and professional expertise. It may result in the detection of structural problems or a diagnosis of a disease that reduces the tree’s vigour and negatively impacts the growth of other trees around it. In recent years, the Emerald Ash Borer (Agrilus planipennis), an invasive beetle from Asia, has killed Ash trees, causing immense damage to wild and urban forests in the northeast part of the continent.