As far as I know the Rudbeckias always look ratty this time of year. Very disappointing plus they were terribly invasive. If it did not grow, count your blessings. Also they are a host plant for Yellow Asters disease, so if you like coneflowers you might want to get rid of it.
The coneflowers can be sprayed with peroxide water, it has nitrogen and will also kill the fungus. 10% is fine I think but Clint will be along.
