June 2022

By volunteering to help pull out garlic mustards and clip dog-strangling vines at this event, you are helping to save numerous habitats, the surrounding wildlife, and our native plants! Take initiative and help out the Earth!

Every bit matters!


What are Invasive Species?

-     Invasive species are non-native organisms that are introduced to new environments. Because of this, they have no natural predators to limit their spread

-    As a result, these species cause harm to the environment, the economy as well as human, animal, and plant health.

Why does it matter?

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-    Invasive species tend to spread quickly and threaten native plants that are important to our ecosystems

-    Not all non-native species are invasive. Species are considered invasive if they harm the environment and prey on native species.

-    Invasive species affect the natural processes of native species causing resource competition and territory changes.

-    The spread of these species depends on the resources they receive in their new territory.

-    This causes a big loss in biodiversity and impacts the processes in the overall ecosystem.

Why should you care?

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-    Invasive species impact our daily lives by threatening our health, culture and connection with the environment which is why it is so important.

-    They impact human health by exposing new diseases and being vessels for other diseases.

-    Its economic impact includes research, agriculture, fisheries, job losses, trades, recreations, and more.

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Garlic Mustard - An Invasive Species

-    FIRST YEAR: It grows its basal rosette of low-growing leaves

-    MAY OF SECOND YEAR: It grows its flowering sta;l reaching a height of 1 meter

-    Garlic Mustards spread through seedpods called siliques in JULE and AUGUST

-    They grow in a wide range of soils but prefer calcareous-based ones.

* Garlic Mustards are biennial plants *


-    It was brought as a source of food and medicine in the 1800s but quickly spread out of control of cultivators in Ontario.

-    They release chemicals such as cyanide that alter the chemistry of the soil which overall impacts the growth of other species

-    Livestock that consumes garlic mustards affect products such as milk that end up with garlic flavour.


-    1800: Garlic Mustards were first introduced to North America from Europe as an edible herb.

-    1879: First record of garlic mustards in Ontario.

-    1891 - 1898: Found in Kingston and Ottawa.

-    1900: Garlic Mustard continued to propagate until it has become an invasive herb today.

Dog Strangling Vine - An Invasive Species


-    Dog-strangling vines are perennial plants, meaning that they live for more than 2 years.

-    These vines can grow up to 2 meters long by wrapping or "strangling" nearby trees and plants.

-    They often grow in sunny areas but can also be found under light shade.


-    The dog-strangling vine does not actually strangle dogs! The name comes from its Greek origin.

-    Similar to garlic mustards, dog-strangling vines were introduced to North America in the 1800s from Eastern         Europe.

-    It was introduced as an ornamental plant for the early settlers.

-    They are an invasive species because they release allelopathic chemicals that block sunlight for small plants.

-    Therefore, dense clusters of dog-strangling vines create a negative change in habitat for wildlife.

-    Dog-strangling vines also endanger native insects such as monarch butterflies because these butterflies             mistake the dog-strangling vine for milkweed and lay their eggs on it, only for them to starve.


-    THE MID-1800s: The dog-strangling vine is first introduced to North America from Eastern Europe as an               ornamental plant.

-    1897: First record of the dog-strangling vine in the United States.

-    THE 1900s: Dog-Strangling vines spread to southern Ontario.

-    PRESENT: The dog-strangling vine continues to expand its range and spreads to southern parts of Quebec.


-->    Spend a fun day with other passionate individuals.

-->    Make new friends and get engaged in your community.

-->    Earn volunteer hours for community involvement.

-->    Win amazing prizes!

-->    Have fun in the outdoors.

-->    Make a positive difference in your community.


-->    Save habitats from detrimental invasive species.

-->    Prevent the growth of garlic mustards by pulling them out before their seed-spreading                       season.

-->    Prevent the growth of dog-strangling vines and help preserve and advocate for our                             environment, biodiversity as well as native ecosystems!

-->   Support your community and wildlife - garlic mustard is known to produce                                                 glucosinolates, a class of chemicals toxic to animals and humans.