Alphabetical Plant Listing

Coreopsis verticillata (Threadleaf Coreopsis)

Threadleaf Coreopsis, Whorled Tickseed, Whorled Coreopsis


A popular garden flower since the 19th century, Coreopsis verticillata (Threadleaf Coreopsis) is a rhizomatous perennial boasting a profusion of showy golden-yellow flowers, 1-2 in. across (2-5 cm), from mid summer to early fall - if spent flowers are deadheaded. Threadleaf Coreopsis is an excellent pollinator plant, attracting bees, butterflies and other pollinating insects. The blossoms are held high above the foliage on slender stems clad with delicate, dark-green leaves divided into thread-like segments. It forms a rounded airy clump of fine, threadlike foliage that is always handsome and weatherproof. Tolerant of heat, humidity and drought, Threadleaf Coreopsis is a real workhorse in hot and often dry summer gardens. Long-lived, It adds cheerful color and a delicate texture element to the landscape. Use in the border or naturalized areas and in swaths to provide a long season of color.

  • Grows up to 30-36 in. tall (75-90 cm) and 18-24 in. across (45-60 cm). Spreads slowly by rhizomes and freely self seeds in the landscape.
  • Performs best in full sun in dry to medium, slightly acidicwell-drained soils. Thrives in poor, sandy or rocky soils and is drought tolerant once established.
  • No serious pest or disease issues. Crown rot may occur in poorly drained soils. Coreopsis is ignored by deer
  • Very versatile, it is a welcomed addition to cottage gardens, naturalized areas, prairies and meadows. Spectacular in mass plantings.
  • Deadheading of spent flowers will keep the plant blooming. Mid to late summer shearing should help tidy up the plant and promote a fall rebloom.
  • Propagate by dividing either in the fall or early spring. Seeds may be sown outside in late fall or the following spring without any cold treatment
  • Native to eastern North America.

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Requirements

Hardiness 3 – 9
Heat Zones 1 – 9
Climate Zones 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Perennials
Plant Family Coreopsis
Exposure Full Sun
Season of Interest Summer (Mid,Late)
Fall
Height 2' – 3' (60cm – 90cm)
Spread 1' – 2' (30cm – 60cm)
Spacing 18" – 24" (45cm – 60cm)
Water Needs Low, Average
Maintenance Low
Soil Type Chalk, Loam, Sand
Soil pH Acid, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Cut Flowers, Showy
Native Plants United States
Tolerance Deer, Drought, Dry Soil, Rocky Soil
Attracts Birds, Butterflies
Garden Uses Beds and Borders
Garden Styles Informal and Cottage, Prairie and Meadow

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F.D. Richards (Flickr), Mariola Anna S (Shutterstock)

While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.


Requirements

Hardiness 3 – 9
Heat Zones 1 – 9
Climate Zones 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Perennials
Plant Family Coreopsis
Exposure Full Sun
Season of Interest Summer (Mid,Late)
Fall
Height 2' – 3' (60cm – 90cm)
Spread 1' – 2' (30cm – 60cm)
Spacing 18" – 24" (45cm – 60cm)
Water Needs Low, Average
Maintenance Low
Soil Type Chalk, Loam, Sand
Soil pH Acid, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Cut Flowers, Showy
Native Plants United States
Tolerance Deer, Drought, Dry Soil, Rocky Soil
Attracts Birds, Butterflies
Garden Uses Beds and Borders
Garden Styles Informal and Cottage, Prairie and Meadow

Great Plant Combination Ideas with Coreopsis

Guides with Coreopsis

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