Poison Ivy?

(Question)

My son was in the back yard and emerged with hives. Is this poison ivy?

(Answer)

Thank you for contacting the Toronto Master Gardeners with your question.

It is a bit hard from the picture, but it appears to be Goutweed, which is very invasive.

Please find the following references on how to deal with it;

https://www.gardeningchannel.com/how-to-get-rid-of-invasive-bishops-weed-goutweed/

https://cvc.ca/your-land-water/tree-planting-and-habitat-restoration-services/invasive-species/invasive-species-spotlights/invasive-plants-spotlight/goutweed-aegopodium-podagra

Good luck with it.