Beloved garden plant or invasive invader?

It’s late May in Wisconsin and the weather is comfortable. It’s a perfect day for a walk. As my dog and I exited town onto a quiet road, I saw a beautiful site. I already knew before getting close that although it looks beautiful, what I was really looking at along the railroad tracks, was an invasive plant species. It is commonly known as Dame’s rocket. Dame’s Rocket was introduced in the 1600’s during European Settlement. It is a pretty plant that looks quite similar to garden phlox. Unfortunately, it spreads quickly taking over areas and displacing native plants. 

Dame’s rocket typically blooms in southern Wisconsin in May and June. It can easily be distinguished from garden phlox, because it has 4 flower petals rather than the 5.

Dame’s Rocket= 4 petals

Garden Phlox= 5 petals

What can you do to stop the spread of this invasive plant? If you see it growing in your garden, or an area you manage, remove it. It is especially important not to allow it to go to seed. Then, after you remove it, plant a native species in its place.