Invasive Plant Escapes Gardens, Spreads Rapidly Across Canada

Residents across Canada are facing challenges from an invasive plant, goutweed, which is rapidly spreading beyond gardens. The plant’s aggressive growth habit poses a significant threat to local ecosystems. Its management requires extensive effort and knowledge, as many homeowners are unaware of its invasive nature when they purchase it.
Understanding Goutweed’s Rapid Spread
Angela Way, a St. John’s homeowner, shared her experience with goutweed. She purchased her home in winter, unaware that this invasive plant was growing in her garden. By the spring, the extent of the infestation became apparent. Her attempts to remove the plant proved unsuccessful, leading her to cover her garden with black tarps to block sunlight. She anticipates that this method may need to be in place for two to three years.
How Goutweed Proliferates
Goutweed has multiple mechanisms for spreading:
- It can extend its reach by over 70 cm annually.
- The plant can spread through contaminated gardening tools.
- Improper disposal of the plant contributes to its prevalence.
- Seeds are dispersed by wind, water, or even animal fur.
Challenges in Removal
Removing goutweed is not straightforward. The plant possesses an extensive underground rhizome network, making it difficult to eradicate. Homeowners must exercise patience, as full removal can take several years.
Being informed about the invasive nature of plants like goutweed is crucial for effective management. As it continues to encroach on gardens and natural areas, proactive measures are necessary to control its spread across Canada.




