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Purple Loosestrife
Lythrum salicaria

Invasive Species

Invasive plant species are one of the biggest threats to the health and diversity of Michigan's native flora. MNPPA member nurseries discourage the use of invasive species and are expected to actively manage production to prevent the distribution of plants or seed of any invasive plants.

What are Invasive Plants?

An invasive species is defined as, an introduced, non-native, species that has naturalized and spread widely, causing ecological harm. Once introduced, these species can aggressively colonize natural areas, decrease biodiversity and compromise the ecological integrity of an area. In addition, most of these introduced species provide little food or habitat needed by the diversity of local native insects, birds and other wildlife.

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Dame's Rocket
Hesperis matronalis

The potential invasiveness of a particular species depends on many factors including geographic location, soil type, and the relative disturbance of the site. Invasive plant species have impacts above and beyond just simple competition. Some invasive species alter hydrology, others impact nitrogen balance or fire ecology to name just a few negative impacts on the greater landscape.
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Spotted Knapweed
Centaurea stoebe

To learn more about invasive plants in Michigan visit:

*Michigan Natural Features Inventory
*USDA National Invasive Species Information Center
*Midwest Invasive Species Information Network
*Michigan Invasive Species Coalition