Coreopsis grandiflora, commonly known as large-flowered tickseed, can be found in prairies, meadows, open woods, thickets, roadsides, and open ground from Florida to Texas and New Mexico north to Georgia, Missouri, and Kansas. Growing in clumps, it reaches a height of 2'. This flower resembles a daisy, featuring deep yellow rays surrounding a golden yellow disk in the center. A single flower appears atop a slender, upright stem, which may grow up to 2' in height.A flower's bloom period is typically from late spring through late summer and sometimes into autumn. However, the bloom period can be much shorter if the flowers are not regularly deadheaded. The upper leaves are pinnatifid and deeply lobed, while the lower leaves are linear and lobeless. Coreopsis has spread north of its native range through introduction and garden escapes in the eastern and central U.S.
It thrives in dry to medium moist, well-drained soil in full sun. Thrives in poor, sandy, or rocky soils with good drainage. Tolerant of heat, humidity, and drought. Prompt deadheading of spent flower stalks encourages additional bloom and prevents unwanted self-seeding. Freely self-seeds and can become somewhat weedy. It also spreads by rhizomes. Plants are slightly short-lived, and self-seeding helps perpetuate good planting in the garden. Plants may be cut back hard in summer if foliage sprawls or becomes unkempt. When grown in borders or other formal garden areas, division may be needed every 2-3 years to maintain robustness. They may be grown as annuals.
