Myosotis scorpioides compete with native plants for space, sunlight, and nutrients. They tend to grow in large monocultures,which can significantly reduce populations of native plants. This ultimately decreases biodiversity of the area that they grow in. These plants also contain pyrrolizidine alkaloids, which are toxic to mammals and can cause weight loss, poor body condition and liver disease.
Forget-me-nots are native to most of Europe and the Western part of Asia. This plant was likely initially introduced to the United States because of intentional planting, as it was a popular garden plant. It has been documented widely in the United States, from Maine to as far South as Georgia, and west to Minnesota, South Dakota, Missouri, Arkansas and Louisiana. It has also been reported in many Western coastal states as well.