WHAT TO KEEP AND WHAT TO WEED OUT
Earth Caretaker explains "Alien Plants are those that are not native to a particular area. There is debate over what a "native" plant is. In North America, it is usually taken to mean a plant that was growing here before the invasion of Europeans.
Alien plants may be invasive or non-invasive. The whole issue of alien plants is important because of those that are invasive. An invasive plant is one that "takes over" an area or ecosystem.
Noxious Weed Control Act Ontario
List of 25 plants you probably should not grow or encourage unless in a restricted area.
Earth Caretaker Alien Plant Directory
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