Jul 11, 2022
With summer well underway and many of us heading off to the cottage or to spend some time out in nature, Joanne and Matt help you identify some of the harmful plants you might find during your travels. In this episode of the Down the Garden Path podcast, they discuss poisonous plants.
What are the common harmful plants when camping and hiking?
After contact with urushiol, approximately 50 percent of people develop signs and symptoms of poison ivy dermatitis. The symptoms and severity differ from person to person.
These symptoms usually develop within four hours to four days after exposure to the urushiol. After the initial symptoms, allergic individuals develop fluid-filled blisters in a line or streak-like pattern. The symptoms are worse within 1 to 14 days after touching the plant, but they can develop up to 21 days later if one has never been exposed to urushiol before.
The blisters can occur at different times in different people; blisters can develop on the arms several days after blisters on the hands developed. This does not mean that the reaction is spreading from one area of the body to the other. The fluid that leaks from blisters does not spread the rash. Poison ivy dermatitis is not contagious and cannot be passed from person to person. However, urushiol can be carried under fingernails and on clothes; if another person comes in contact with the urushiol, they can develop poison ivy dermatitis.
Any treatment mentioned during the show is not medical advice and is based on the personal experience of Joanne, Matthew, and their listeners of the podcast. If you encounter any of the plants mentioned during the show, please seek professional medical attention immediately! In case of an emergency, call 9-1-1.
Source: UpToDate and Poisonous Plants by F. Stary, Z. Berger
As the owner of Down2Earth Landscape Design, Joanne Shaw has been designing beautiful gardens for homeowners east of Toronto for over a decade. A horticulturist and landscape designer, Matthew Dressing owns Natural Affinity Garden Design, a landscape design and garden maintenance firm servicing Toronto and the Eastern GTA. Together, they do their best to bring you interesting, relevant and useful topics to help you keep your garden as low maintenance as possible. In their new book, Down the Garden Path: A Step-By-Step Guide to Your Ontario Garden, Joanne and Matthew distill their horticultural and design expertise and their combined experiences in helping others create and maintain thriving gardens into one easy-to-read monthly reference guide. It's now available on Amazon.