Most waterleafs are tough perennials. This one is a biennial. It goes to seed by mid-season, and the seeds sprout soon after. By winter's onset, there are smaller plants, getting a root hold for the next season. In a garden, this stage is hardly noticeable. If they have the right spot, in the spring they will quickly grow into plants approaching two feet, with a spreading crown of these half-inch flowers. I think this is one of the really good plants for a wildflower shade garden. They grow in woods and borders in AL, AR, IA, IL, IN, KS, KY, MI, MN, MO, MS, NC, NE, OH, PA, TN, WI, WV, and ON. Lenawee Co MI, 5/24/11.