Common Name: tickseed
Type: Herbaceous perennial
Zone: 3 to 9
Height: 1.50 to 2.00 feet
Spread: 1.00 to 1.50 feet
Bloom Time: June to August
Bloom Description: Yellow disk with rose rays
Sun: Full sun
Suggested Use: Naturalize
Tolerate: Deer, Dry Soil, Shallow-Rocky Soil
Easily grown in medium moisture, well-drained soil in full sun. Unlike other species of Coreopsis, C. rosea and its cultivars have very little drought tolerance and need consistently moist soils in order to thrive. Avoid poorly-drained heavy clay soils, however. Prompt deadheading of spent flower stalks can be tedious for a large planting, but does tend to encourage additional bloom and prevent any unwanted self-seeding. Plants may be sheared in late summer to promote a fall rebloom and to tidy the planting (stems often become matted as summer progresses). In optimum growing conditions, plants will spread in the garden by rhizomes and self-seeding to form a dense ground cover, sometimes to the point of being considered aggressive. 'American Dream' comes true from seed and is available for purchase from many seed companies, though Alan Armitage suggests that this cultivar does not differ significantly from the species.
Coreopsis rosea (sometime commonly called pink coreopsis or pink tickseed) is noted for being the only coreopsis with pink flowers. It closely resembles C. verticillata in appearance and habit, but lacks the latter's heat and drought tolerance. 'American Dream' is a rhizomatous cultivar which typically grows in dense, bushy clumps to 18" tall. Features daisy-like flowers (1/2 to 1" diameter) with pink untoothed rays and yellow center disks. Flowers appear singly on short stalks in a profuse and lengthy summer bloom. Whorls of linear, grass-like leaves lend a fine-textured and airy appearance to the plant. Plants in the genus Coreopsis are sometimes commonly called tickseed in reference to the resemblance of the seeds to ticks.
No serious insect or disease problems. Can be an aggressive spreader. Crown rot may occur if grown in moist, poorly drained soils. Performs best in cool summer climates, and can appear rather scraggly with poor flowering in the hot and humid summer conditions of the deep South. Weak plant stems tend to sprawl and mat, particularly in hot and humid climates with periodic heavy summer rainfall.
Long summer bloom and airy foliage provide good accent in borders or rock gardens. Good small area ground cover. Also effective as an edger for borders, foundations and walks/paths. Naturalized areas, native plant gardens or cottage gardens.