Some of what I have learned:
It is planted as an ornamental although it escapes quickly by it's prolific seed set. Some of it's success is due to it's seeds in "Wildflower" mixes. Studies on Dame's Rocket are not extensive and is not widely recognized as an invasive. Effects of Dame's Rocket are not known, it could compete with native species.
Prohibited in Massachusetts...banned in Connecticut...invasive in Michigan...invades wild areas everywhere but the deep south.
It is NOT to be confused with Phlox paniculata...Phlox has 5 petals as pictured below.
Where as Dame's Rocket has 4 petals as pictured below. This one plant grew out of a wildflower mix last year, in a container. I saved the seeds and now have seedlings up in the greenhouse. I really like this flower.My question to you : What do you know of Hesperis matronalis--Dame's Rocket in your area, friend or foe?
Today I am Thankful for the sunshine outside my window!