On Friday, September 19, the U.S. Botanic Garden's outdoor National Garden will close early at 5 p.m. It will reopen for regularly scheduled hours on Saturday, September 20 at 10 a.m.
This cultivar of the rare Tennessee coneflower is a tolerant of drought, heat, humidity and poor soil. You can divide clumps every 4 years when become tight clump. It will typically rebloom without deadheading and the seed heads are highly attractive to birds. Some feel that the removal of spent flowers improves appearance and because 'Rocky Top' may not come true from self-seeding in the garden.