Its about 7 to 9 feet tall. Its growing in a steep ditch and I just think its a very pretty colour. It probably gets about 8 hours of full sun a day or more.

Centaurea; most likely jacea or nigra.

Begging to differ... Vernonia sp., possibly Vernonia noveboracensis, though it may be a different species. (This is not a genus I'm familiar with.)

I agree, it's a Vernonia, either Giant Ironweed (Vernonia gigantea) or New York Ironweed (Vernonia noveboracensis).

We call it ironweed here (Vernonia)
I have it on my property , grows wild around here.
I have identified mine as Giant ironweed (Vernonia gigantea) , but there are some similar looking vernonia

cross posted

I agree with Vernonia. There are at least five species known to grow in Ohio, but Vernonia gigantea seems to be the most common.
http://bonap.net/NAPA/TaxonMap...