Ontario is expanding efforts to stop the spread of invasive phragmites, a fast-growing plant widely described as one of Canada’s most damaging invasive species. More than 60 projects are now underway across the province to control the plant, restore wetlands and protect wildlife habitats.
Known as common reed or elephant grass, invasive phragmites can grow up to five metres tall in thick clusters. It spreads aggressively, crowds out native plants, blocks visibility along roads and changes natural ecosystems in marshes, shorelines and ditches.
Why It’s a Major Problem
Invasive phragmites was identified in 2005 by Agriculture and Agri-Food Canada as Canada’s worst invasive plant. It was introduced centuries ago and is now found across much of Ontario, including areas near Georgian Bay and Lake Superior.
The plant spreads through seeds carried by wind and through root fragments moved in soil, machinery or water.
Ontario’s Response
Through the Invasive Phragmites Control Fund, local organizations and municipalities can receive support for removal and habitat restoration projects. Funding ranges from small community grants to larger regional projects.
The Ontario Phragmites Action program, led by conservation groups and invasive species experts, is coordinating many of these efforts.
Projects Happening Now
Current projects include:
- Mississauga — treatment of targeted sites to improve biodiversity
- Durham Region — regional management planning and mapping
- Essex County — Indigenous-led restoration and control work
- Ajax — management near Carruthers Marsh
- Brighton — treatment near Presqu’ile Provincial Park
How to Identify It
Look for:
- Tall dense stands
- Tan stems
- Blue-green leaves
- Large feathery seed heads
Native phragmites also exist, but they grow less densely and support healthier wetlands.
How Residents Can Help
You can reduce the spread by:
- Cleaning boots after hikes
- Washing bikes, boats and outdoor gear
- Removing mud and plant debris from equipment
- Reporting sightings with clear photos and location details through citizen science apps or local conservation groups
Why It Matters
Controlling invasive phragmites helps protect wetlands, birds, fish habitat, pollinators and road safety. Ontario’s growing response shows how local action can make a real difference against one of the province’s toughest environmental threats.