This Impatiens species comes from the Himalayas and the seed is winterhard. It is an annual, but will come back each year, but only if the seeds have been exposed to frost, so do not try to grow it in a warm greenhouse. It will grow in most types of soil and can produce white or yellow flowers. If you consistently remove the yellow ones, you will, after only a couple of years, end up with just white ones. Seed available from my webshop.

Impatiens edgeworthii yellow

Impatiens edgeworthii white