I bought it at a chinese nursery and the woman did not know the name in english. She said that it would keep growing every year, but it died over winter, however there are numerous seedlings growing. If anyone knows the name I would really appreciate it. The plant is a light green colour and almost seems like a sedum. It grew to about 18 inches tall and needed staking. Thanks
Also known as "touch-me-not", due to how the seed pods EXPLODE. I used to have them in a wide array of blossom colors: they reseeded themselves for many years. As with other impatiens, they look good in a dense group---this helps hold the plants upright as well.