After eight years of intensive breeding work with eight species of coreopsis, Darrell Probst is releasing the first plant in his Big Bang™ Series. 'c' PP19364 is a showy hybrid with very large, canary yellow flowers that measure up to three inches across. They are held on well-branched stems atop a mound of healthy green, medium textured foliage. The plants are long blooming, from about midsummer into early fall. This is one of the taller kinds of Tickseed, so it is best situated towards the middle of the flower border.