Coreopsis is a long blooming, clump-forming perennial that produces large numbers of daisy-like flowers from summer into fall. The hybrids of this plant are notable mainly for the flower colors, which often differ from the usual sunny yellow of most coreopsis.
Coreopsis range between 18 inches to 3 feet tall and 2 to 3 feet wide. The clumps can get wider over time.
Native geographic location and habitat:
Coreopsis is native in the eastern United States.
Attracts birds or pollinators:
Coreopsis attracts butterflies and other pollinators.
The opposite, thread-like leaves are 2 to 3 inches long and divided in three parts, creating a very fine-textured plant.
The yellow, red, white, or pink flowers are 1 to 2 inches wide and held on their stems one by one.
The fruit has an inverted bell-shape with many seeds at the top.
Coreopsis should be planted in a well-drained, sunny location. For heavier rebloom in September, shear the old flower heads off in August. Divide them in spring or autumn every two to three years, or as needed. This species self-sows. To avoid reseeding, cut the remaining flower heads off at the end of the season. In dry sandy soils, this plant will spread quickly.
List of pests, diseases, and tolerances:
This plant has no serious pests or diseases. If grown in moist, poorly drained soils, the plant may get crown rot, powdery mildew, or fungal spots. If the soil is too rich or moist, the clumps may sprawl open. Coreopsis is deer resistant. It tolerates drought, heat, and humidity
Jethro Tull Coreopsis (Coreopsis ‘Jethro Tull’):
Jethro Tull has distinctive fluted flower petals that are golden yellow. More compact than most coreopsis, this variety grows twelve to eighteen inches tall.
Mercury Rising Coreopsis (Coreopsis ‘Mercury Rising’):
A threadleaf variety carrying red flowers with sunny yellow centers. This variety is shorter than some, topping out at about eighteen inches.