Emerald Ash Borer

What does an ash tree look like?

Ash trees have the following features:

1. Buds and stems are directly opposite each other along branches
2. Leaves are compound and contain five to 11 finely toothed leaflets
3. Bark is tight and rough and often has a distinct diamond pattern
4. Seeds are oar-shaped and hang down in clusters

What does an EAB infested ash tree look like?

EAB infested ash trees have the following signs:

1. D-shaped exit holes in the bark
2. S-shaped larval feeding galleries under the bark
3. Leaves with ragged edges from feeding
4. Very few leaves or dying branches
5. Cracks in the bark
6. Shoots growing out of the trunk

Ash tree removal/replacement program and wood chip giveaway

The Emerald Ash Borer (EAB) is expected to kill all of the ash trees in Richmond Hill. The City is implementing a management strategy for ash trees on public property:

Removals

Streets (Boulevards)

• All remaining City-owned ash trees on streets are re-assessed for damage each June. Trees with the most significant damage at the time of assessment are marked with an 'R' to indicate that they will be removed.
• Removals take place from January to March each year.
• Stumps are removed in the spring.

Parks

Removal of hazardous ash trees in parks is now complete.

In some forested areas, ash tree logs and branches will be left on the forest floor after being cut down. This is because woody debris and fallen logs are an important part of a healthy forest eco-system, recycling nutrients back into the environment and providing habitat for plants and animals.

Replanting

Trees that are removed in the winter will be replaced by the end of the year.

Free wood chips for your garden

The wood chip pile is available each year from the first Friday in May to the Friday after Thanksgiving.

Using wood chips in your garden means less weeding, less watering, faster plant growth, protection from overheated soils during hot summers, added nutrients to your soil and less bruised fruit under fruit trees!

Free wood chips are available for pickup at Richmond Green, 1300 Elgin Mills Road East. The pile is located in the parking lot at baseball diamond #2 (south of William F. Bell Parkway across from Richmond Green Secondary School). Please help yourself. Tools and containers are not provided, so please bring your own.

Ash trees on public property

In Richmond Hill, we value our natural tree cover and are committed to protecting it. Our EAB Management Strategy aims to reduce the significant aesthetic, environmental and financial impacts of EAB on Richmond Hill by treating the largest and healthiest trees while replacing smaller affected trees over time. Implementation of the Management Strategy is underway.

Property owners may apply for a permit to treat City-owned ash trees adjacent to their property with TreeAzin™, at their own expense, by completing the following application.

Application to Treat City-Owned Trees

Completed application forms can be emailed to naturalenvironment@richmondhill.ca.

Ash trees on private property

Property owners are responsible for trees on private property. If you have an ash tree on your property and suspect an EAB infestation we urge you to consult with a professional arborist about management options that will protect your property and ensure your safety. Arborists can be found in the Yellow Pages and other business directories. You should choose an arborist certified with the International Society of Arboriculture (ISA), registered with the American Society of Consulting Arborists (ASCA), or Provincially qualified Arborists and Utility Arborists by the College of Trades. Make sure to ask if there is a fee for inspection and quotes, as some companies provide these services free of charge.

It is recommended that property owners ask about options for tree protection, tree removal* and tree replacement. In addition, ensure that you get multiple estimates for any tree work.

*Permit fees for ash tree removal will be waived for the duration of the EAB Management Strategy (10 years), but an application must still be submitted to obtain a permit. Please visit RichmondHill.ca/TreeBylaw for more information.

Beaver Woodland is the forested area directly east of David Hamilton Park. A significant portion of this forest was made up of ash trees which have been killed by the Emerald Ash Borer. As a result, the forest was in poor health and vulnerable to undesirable plants which grow aggressively and have the ability to destroy our unique environment.

Restoration activities included the removal of invasive species, removal of dead and hazardous trees, and planting of native trees and shrubs to improve forest health and provide habitat for local wildlife.

To date, more than 2,600 trees and shrubs have been planted.

2026 Restoration Activities

• Invasive plants dominating the woodland will be treated with herbicide this year in an effort to reduce populations and promote the growth of newly planted trees and shrubs.
• Tree planting
• Tree monitoring is ongoing.

A significant portion of the forested area throughout the Saigeon Trail system is made up of ash trees which have died due to Emerald Ash Borer infestation. As a result, the forest is in poor health and vulnerable to undesirable plants that grow aggressively and have the ability to destroy this unique environment. The goal of this project is to restore the woodlands within the Saigeon Trail system to a healthy and diverse urban forest while maintaining it as a recreational site for trail users.

Restoration activities included the removal of invasive species, removal of dead and hazardous trees, and planting of native trees and shrubs to improve forest health.

To date, more than 2,000 trees and shrubs have been planted.

View Saigeon Trail Restoration Map.

2026 Restoration Activities

• Invasive plants dominating the woodland will be treated with herbicide this year in an effort to reduce populations and create space new plantings.
• Tree planting
• Tree monitoring

A significant portion of the forested area throughout the Rouge River Headwaters Valley is made up of ash trees which have died due to Emerald Ash Borer infestation. As a result, the forest is in poor health and vulnerable to undesirable plants that grow aggressively and have a negative impact on this unique environment.

The goal of this project is to restore the woodlands within Rouge River Headwaters Valley to a healthy and diverse urban forest while maintaining it as a recreational site for trail users. While the removal of dead trees and herbicide treatment of invasive plants will change the appearance of the forest, this is a temporary and necessary step to create space for new trees that will bring the natural area back to a healthy forest for the community to enjoy.

View Rouge River Headwaters Valley Restoration Map.

Forest restoration work will include:

• Dead ash tree invasive plant and debris removal
• Herbicide treatments
• Wildlife habitat structure creation
• Tree and shrub planting
• Monitoring

2026 Restoration Activities

• Invasive plants dominating the woodland will be treated with herbicide this year in an effort to reduce populations and create space new plantings.
• Tree planting
• Wildlife habitat structure creation
• Tree monitoring