Thank you, all. Persicaria campanulata is the winner!
@Thalictrum I noted you posted a photo in the database from your garden and you also had a bit of browning along the leaves. Do you know what causes that? Mine gets that every year and I don't see any bugs. I did note that this can be a bog plant, so perhaps it needs more water, although mine doesn't ever get droopy like it is thirsty. ??
