Invasive species are plants or animals are introduced (non-native) species that cause harm or negative impacts to the environment, economy and human and animal health. Invasive plants spread quickly and out-compete other species. They have few natural controls to keep their population in check. Some invasive plants modify soil chemistry to reduce success of plants nearby. The below list offers additional resources to the information found in HAT's Invasive Species Guide. The links below offer a variety of resources, groups, and other supplemental materials that can help us stay up to date, or simply more informed on invasive species and methods of interacting with them.
For HAT's Gardening with Native Plants Guide & HAT's Urban Forest Guide please see our Publications page.
Garry Oak Ecosystem Restoration Team - Invasive Species Publications
Saanich Priority Invasive Plants such as: Gorse, Yellow Flag Iris, Poison Hemlock, Knotweeds, & Giant Hogweed
Noxious Weeds in King County, Washington
BC Report-A-Weed - online invasive plant reporting website & mobile App
Books concerning the Pacific Northwest, Invasive and native species, and other handy information:
Pojar & MacKinnon. Plants of Coastal British Columbia including Washington, Oregon & Alaska. Lone Pine Publishing.