Invasive plants kill native plants and destroy Coquitlam's beautiful natural habitat. We need your help to stop the introduction and spread of garden plants that can be harmful to people, animals and ecosystems.
Invasive plants harm the environment.
Invasive plants are non-native plants that were introduced to our environment through seeds, cuttings, garden plants, etc. They spread aggressively and take over the natural environment. They push out native plants, including endangered species, and destroy habitat for fish, birds and other wildlife. They can also cause erosion and silt problems in creeks and impact aquatic creatures. Invasive plants are expensive to control and eradicate. Some, like Giant Hogweed, are even dangerous to human health. Quite simply, they are Bad Seeds.
Read Coquitlam's Invasive Plant Management Strategy for more information.
Bad Seed Newsletter
Late summer is a great time to spot Japanese knotweed as its white flowers are in blossom. Remember its location because this plant is edible if it's removed in early spring. Learn more about invasive plants and upcoming events in our Bad Seed Newsletter.
Help prevent invasive plants from spreading.
- Never dump garden waste or hanging baskets into natural areas.
- Dispose of plant material through the City’s Green Can Program.
- Avoid buying plants promoted as fast spreaders or vigorous self-seeders as they are often invasive.
- Grow native plants in your garden - for more information contact the Native Plant Society of British Columbia
- Contain or remove invasive plants on your property to prevent them from spreading to other properties.
- Control weeds that grow under bird feeders from falling seeds as they can become a source of invasive plants.
- Use caution when ordering plant seeds over the Internet or through catalogues. Introducing foreign seeds are a key way that invasive plants find their way into our community.
- Read the Grow Me Instead brochure to learn about BC's most "unwanted" plants, along with recommended alternatives.
|Common Invasive Plant Species |
A climber that smothers almost all vegetation and can kill trees.
Common to hanging baskets, it acts like ivy, smothering native plants.
This trailing vine displaces native plants needed by wildlife.
This very persistent climbing vine smothers native plants.
Dense, tall thickets can grow from a small root or stem, crowding out other plants.
Known for its umbrella shaped flower heads, it can reach up to 15 feet and its sap can cause severe burns.
Parks Customer Service
For any concerns or enquiries, please contact us:
Giant Hogweed is a non-native invasive plant recently found in Coquitlam. Giant Hogweed poses a serious threat to human health and the environment. The clear sap found in its stem and hairs can result in severe burns and blistering. Children have used the large, hollow stems as pea shooters and telescopes resulting in burns to the mouth and/or eyes. If sap enters the eyes, it can cause temporary or permanent blindness.
Staff are monitoring public lands for signs of Giant Hogweed and are asking for the community's help to identify and eliminate Giant Hogweed in Coquitlam.
Please report Giant Hogweed in Coquitlam, by using the Online Hogweed Reporting Form or by contacting:
Parks, Recreation and Culture
- Very tall, reaching up to 5 metres
- White flower heads reach up to 1.5 metres in diameter, bloom in mid August
- Leaves are shiny and large with coarse, jagged edges
- Stalks have purple spots or streaks and stiff bristly hairs
- Typically grows on riverbanks, ravines, vacant lots or along roads, but can also occur on residential property
Removal and Disposal
If you find Giant Hogweed on your property, it needs to be removed as per the City's Noxious Weed Bylaw No. 4181, 2010.
- It is best to let a professional remove this plant
- CAUTION - If you are going to remove the plant yourself, always wear protective, waterproof clothing, gloves and safety goggles and follow Work Safe BC instructions on their safety bulletin and video.
- NEVER compost the plant or put in your Green Can.
- Dispose of all plant parts in double-bagged garbage bags and put out for curbside collection.
- Do not transfer soil from within four metres of the plant as the soil may contain Giant Hogweed seed.
- Continue to monitor the area for several years.
- If you are exposed to Giant Hogweed, wash the affected area immediately, keep it out of the sun and seek medical advice.
Are you interested in becoming a Bad Seed volunteer? It’s easy — just show up to one of our Bad Seed events.
If you enjoy the outdoors, want to help the environment and don’t mind getting your hands dirty, we’d love to see you there. If you plan to volunteer with a group with five or more people, please let us know beforehand by emailing email@example.com
PRC - Bad Seed Events