I bought this plant in May at a yard sale and it has grown from 4 inches to over 6 feet. It has Razor edged leaves and light mauve flowers similar to sweet peas.
Impatiens glandulifera common names (Himalayan Balsam), (Kiss Me On The Mountain) and several others.
And depending on where you are located, often considered a noxious weed/invasive species.
Thank you so much for the quick response, I will carefully remove it before I see a lot of seed pods.