Annual Coreopsis, Calliopsis
Easy-to-grow members of the sunflower family yielding a profusion of yellow, orange, maroon, or reddish flowers. Deadhead for longer bloom; use hedge shears to remove large numbers of spent blooms. Both annual and perennial kinds are easy to propagate—annuals from seed sown in place or in pots, perennials from seed or division. Plants tend to self-sow; seeds attract birds.
The species listed here are from the eastern and southern U.S. unless otherwise noted.Coreopsis tinctoria
Native to much of North America, the dramatic coreopsis tinctoria is slender, upright, 1 1/2 –3 ft. tall, 1–1 1/2 ft. wide, with wiry stems; much like cosmos in growth habit. Smooth leaves and stems. Summer-to-fall flowers in yellow, orange, maroon, bronze, and reddish, banded with contrasting colors; purple-brown centers. Dwarf and double varieties are available. Sow seeds in place in dryish soil.
Perennial in Zones 1–24, H1; often grown as annual in all zones. Native to California and Oregon...
The common garden zinnia, sold in strains ranging from less than a foot high and wide to 4 ft. tall, h...
From southern Europe. Grows 2 1/2 to 3 ft. tall, 1 ft. wide. Oblong, coarsely toothed leaves. Many lon...