Eliminating ragweed

A significant number of people are allergic to ragweed. We work hard to limit its presence on public property. Have you seen any ragweed growing? Call us and tell us where you saw it. Is there ragweed in your yard? Read our tips to find out how to get rid of it.

On this page:

Recognizing ragweed

Make sure what you saw is ragweed and find out how to tell it apart from poison ivy.

Eliminating ragweed on city property

Report ragweed

We’ll send teams to remove it quickly.

311

Outside of Montréal: 514-872-0311

Monday to Friday: From 8:30 a.m. to 8:30 p.m.
Saturday, Sunday and public holidays: From 9 a.m. to 5 p.m.

Cleanup organized by an éco-quartier

Community ragweed eradication activities are planned by some éco-quartiers during the summer. Contact them to find out more.

Find an éco-quartier

Eliminating the plant in your yard

  • Pull up or cut ragweed as soon as it starts to grow. To prevent the production of pollen, which causes allergies, it must be removed before it begins to bloom. Mowing is recommended at least twice every year, including mid-July and mid-August.
  • Use mulch in areas where there is no grass and improve soil quality (potting soil, fertilizer) to prevent ragweed from growing.
  • Sow or plant other plants, such as buckwheat, bluegrass, clover or grass, to compete with ragweed.
  • Dispose of cut or unearthed plants in your garbage bin. Avoid placing them in the compost bin, as it may become contaminated with ragweed seeds.
Last updated September 10, 2026