This impatien plant seeded at the end of last summer. I brought it into the house before frost and grew it in my kitchen window. It bloomed all winter long. By spring, it was quite large, so I took cuttings to root in water. Impatiens are easy to root simply by putting cuttings in water. It takes about a week or two.
I also overwintered these coleus from plants I grew from seed last year. I took cuttings in the fall and put them in water. Coleus are probably one of the easiest plants to root in water. I overwintered them as well, planting them in this container in June.