If you're looking for a tall native perennial that attracts a large diversity of insects (and pollinators) then Culver's Root might be a good option.
Reaching heights of 6' feet where there's adequate moisture, the white spikes of flowers open in late June to early July.
Culver's Root is native to sunny to partially shaded locations, often found just upland of moist wetlands. It prefers sandy to loamy soils. If you plant it in humus-rich soils it will spread quickly forming a large cluster.
Although the flowers have no scent, they attract many types of insects who seek out the nectar and pollen. A mid-season favorite of the Great Black Wasp.
Culver's Root is native to eastern North America. See map below for range.
|Kartesz, J.T., The Biota of North America Program (BONAP).
2011. North American Plant Atlas. Chapel Hill, N.C.