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Over the last century the global horticultural trade has exploded, with plants from all over the world being grown in new places... with unintended consequences. Most common garden plants, like hostas, peonies, and begonias, are non-native species that remain confined to the garden but provide no benefit to pollinators and other wildlife - making the garden pretty to look at but functionally useless for nature. And many of the traditional garden staples known for their perceived hardiness, resilience, and low maintenance are invasive species actively harming the environment!
Invasive species are plants, animals, and microorganisms that have been introduced to an area outside of their natural range and have a negative impact on the environment, the economy, and/or society and human health. Invasive plants outcompete native species for light, water, and space by growing rapidly to form dense stands, reproducing quickly with lots of seeds/roots, and sending chemicals into the soil to stop other plants from growing (allelopathic). As the native plants are pushed out, our insects and animals lose vital food sources and habitat. Invasive plants are a major threat to a healthy environment and biodiversity. Unfortunately, invasive plants are adaptable and easily escape from our gardens into nearby natural areas - whether we notice or not. As gardeners we have a responsibility to avoid planting invasive plants, removing them from our gardens when they are present, and disposing of yard waste properly. |
Invasive Species Lists:
Resources:
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Common Garden Invasives
Have you spotted any of these invaders in your garden? Many of these species continue to be sold at garden centres and nurseries to unsuspecting customers. Protect your garden and the environment from invasive species by learning about what plants are and aren't native to your area and asking questions if you're not sure.
