Let’s De-Phrag The Marsh! Project – Learn More

Phragmites photo

What Is Phragmites?

Phragmites (Phragmites australis) or Common Reed is a non-native perennial grass that was introduced to North America from Eurasia. It is a concern for wetlands and wet areas because it:

– can grow into very dense monoculture stands

– spreads quickly (seeds, above ground stolons, and underground rhizomes)

– can reach heights of up to 5 metres (16 feet)

– outcompetes native species for water and nutrients

– displaces native vegetation and biodiversity

– provides poor habitat for wildlife


You can help to prevent the spread of Phragmites.

– stay on designated trails to prevent the spread of seeds

– do not break the seed heads off to bring home

– do not plant it in your garden

– do not buy it from a garden centre

– follow the best practices for management and control click here

– do not compost it.

picture of invasive phragmites

If you see it, report it! If you come across Phragmites (or any introduced species) using the EDDMaps Ontario (Early Detection & Distribution Mapping System):  https://www.eddmaps.org/ontario/

Have a quick look at Phragmites and how it spreads in this informative poster. Introduction to Invasive Phragmites poster (pdf)

Introduction to Phragmites Webinar. Watch our webinar to learn more about this non-native invasive plant. Click here: Video link

Visit these websites to learn more about Phragmites:

Invasive Species Centre: https://www.invasivespeciescentre.ca/invasive-species/meet-the-species/invasive-aquatic-plants/

Phragmites Adaptive Management Framework: https://www.glc.org/work/phragmites/pamf

Ontario Invasive Plant Council: https://www.ontarioinvasiveplants.ca/invasive-plants/species/phragmites/

Ontario Phragmites Working Group: https://www.opwg.ca/

Ministry of Natural Resources & Forestry: https://www.ontario.ca/page/invasive-species-ontario

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