Invasive Purple Jewelweed Spreads Across Upper Peninsula

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An aggressive, invasive plant known as purple jewelweed is rapidly spreading through Michigan's eastern Upper Peninsula, encroaching on residential backyards and local waterways according to state officials.

Why it matters

Invasive species like purple jewelweed can disrupt local ecosystems, outcompete native plants, and pose risks to wildlife. Their rapid growth and ability to spread quickly through soil and water make them a major threat to the region's natural habitats.

The details

The purple jewelweed, also called touch-me-not, is an annual plant native to Asia that has established a foothold in the Upper Peninsula. It grows quickly, reaching up to 3 feet tall, and spreads aggressively through its seeds and underground rhizomes. The plant is already overtaking backyards, gardens, and creeks in the Brimley area.

• The invasive purple jewelweed was first spotted in the Upper Peninsula in 2022.
• State officials say the plant has spread rapidly over the past 4 years.

What’s next

The Michigan Department of Natural Resources is working on developing a plan to control the spread of purple jewelweed in the Upper Peninsula.