Common Evening Primrose
Last fall I planted Common Evening Primrose (Oenothera biennis) by seeding directly in the garden. The seed was collected along a railroad track locally. Those plants grew well in the worst kind of subsoil. This Primrose is supposed to be a biennial, but mine bloomed the first year. Others seeds started in a small pot grew well but did not bloom. Those have been transplanted into the garden lately.
I've seen Rubythroats nectar from this species in northern Wisconsin. I didn't notice any hummers at my Primrose, but I like this tough plant. The flowers are bright clear yellow with a nectar spur. It requires only part to full sun to bloom well over a long period. It seems the plant is larger in sun.