Though usually more expensive than summer annuals, summer-blooming perennials tend to give gardeners more bang for the buck in the long run, both monetarily speaking and in time spent. Consider tickseed, or coreopsis, a mounding perennial that produces masses of pollinator-attracting flowers all summer long. Plant it once, deadhead spent flowers for continuous blooms during the summer, let it die back at freeze, then wait for it to reappear in the spring. 'Jethro Tull' coreopsis flowers are a golden yellow, comprised of tubular petals with ruffly edges that rise above compact mounds of foliage, 12 to 18 inches tall and wide, providing a burst of color in the summer garden. Bees and butterflies love the flowers, and its a great addition to cut-flower gardens as well.