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Coreopsis (Coreopsis lanceolata), also known as tickseed, is a perennial herbaceous plant native to North America, now grown as an ornamental flower worldwide for its bright yellow blooms and remarkable ease of cultivation. It's one of the most loved choices for wildflower meadows and low-maintenance borders.
A member of the Asteraceae family, it grows in a bushy clump 30-60 cm (12-24 in) tall. The leaves are lance-shaped, mostly clustered at the base of the plant.
The flowers, resembling small yellow daisies with a darker center, bloom abundantly from early summer through the first autumn frosts.
Sow in spring, either directly outdoors or in trays, covering the seeds lightly (2-3 mm / 0.1 in). Germination takes 10-15 days at 18-21°C (64-70°F).
It prefers well-drained soil, even poor ground, in full sun. Once established it tolerates drought well and doesn't need frequent watering.
Thin plants to about 30 cm (12 in) apart; deadheading spent flowers encourages continuous fresh blooms all season long.
Avoid nitrogen-rich soil, which favors leafy growth at the expense of flowering. In pots, choose roomy containers with good drainage at the bottom.
A tough, resistant plant, rarely bothered by pests. The main risk is root rot in soil that's too wet or poorly drained.
The name Coreopsis comes from the Greek "koris" (bug) and "opsis" (appearance), referring to the resemblance of the seeds to small insects — hence the common name "tickseed". It's an excellent plant for bees and is also popular in naturalistic gardens and pollinator meadows.