Coreopsis are superb in the border. Reliable, long blooming daisy-like flowers are produced from early summer into fall. Just give them some sun and enjoy the show. Big Bang Series was hybridized for larger flowers, these Coreopsis will transform with cooler temperatures. They set little to no seed and put all there energy into flowering.
Of the easiest care, likes a hot dry spot. Deadheading (removing spent blossoms) extends blooming, so pick a few for cut flowers while you are in the garden. Leave new fall growth at the base for overwintering. Benefits from division every 2-3 years in spring.