This is the only Hairy Willow Herb ( Epilobium hirsutum) plant that we have on our property, and , in fact, is the only one that I have seen anywhere in our area. It grows to about 3' tall and only has a few flowers at a time. According to Wikipedia, it usually grows in damp spots. This one gets shade in the morning but the soil would be a bit on the dry side . It was never watered and survived our dry summer just fine. The roots would have been shaded by the beebalm growing around it. Hopefully, it will self-sow and I'll have more of it growing around. Other names for it are : codlins-and-cream, apple-pie, and cherry-pie. It isn't a true native to NA but it is in Europe, South Africa and Asia.