Coreopsis leavenworthii Torr. & A.Gray
Coreopsis leavenworthii var. leavenworthii, Coreopsis angustata, Coreopsis lewtonii
Bloom Time: Year-round
Coreopsis leavenworthii is an annual or short-lived perennial plant, up to 28 inches (70 cm) tall, with yellow flower heads that sometimes have reddish-brown blotches at the base of the ray florets. Leaves are pinnate to bipinnately-compound. It blooms year-round, with the heaviest blooming during May, June, and July.
USDA hardiness zone 8a to 11b: from 10 °F (−12.2 °C) to 50 °F (+10 °C).
How to Grow and Care
Most varieties are very easy to grow and are not particular about soil quality or soil pH. Many can be grown from seed, either started indoors, 4-6 weeks before your last expected frost, or direct-seeded outdoors. Many will seed themselves. However, hybrid varieties do not grow true to seed.
Coreopsis will need regular water when first planted until they are established. After that, they are quite drought-tolerant.
Deadheading will keep the plants blooming throughout the summer. Some of the smaller flowered varieties are difficult to deadhead, and you may prefer to shear the plants once the first flush of flowers fades. They will fill in quickly.
Most Coreopsis plants will form tidy clumps, but some of the taller species may require staking to look attractive, especially if grown in part shade.
Although they are rugged plants, they don't tend to live more than 3 to 5 years. A decrease in flowering is a signal that is time to divide the plants or plant some new ones from seed. See more at How to Grow and Care for Coreopsis.
Native to the United States (Florida and Alabama).
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