Coreopsis verticillata 'Grandiflora' (Threadleaf Coreopsis)
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Coreopsis verticillata 'Grandiflora' (Threadleaf Coreopsis)

Threadleaf Coreopsis 'Grandiflora', Whorled Coreopsis 'Grandiflora', Coreopsis 'Grandiflora', Tickseed 'Grandiflora', Coreopsis verticillata 'Golden Shower'


An excellent performer, award-winner Coreopsis verticillata 'Grandiflora' (Threadleaf Coreopsis) is a compact perennial forming a gorgeous mound of finely divided leaves. Blooming from early summer to fall, it gets covered with a profusion of large, rich golden-yellow blossoms. Exceptionally vigorous, this perennial tickseed forms airy clumps of fine, threadlike foliage on upright stems that add a lovely delicate texture element to the landscape. Long-lived, this is one of the best and toughest performers suitable for a sunny position in the garden.

  • Recipient of the prestigious Award of Garden Merit of the Royal Horticultural Society
  • Grows up to 24 in. tall (60 cm) and 18 in. wide (45 cm).
  • Performs best in full sunin dry to medium moisture, well-drained soils. Tolerates partial shade in hot summer areas. 
  • Easy to grow, relatively pest and disease free, this Coreopsis is a favorite of bees and butterflies but is ignored by deer.
  • Very versatile, it is a welcomed addition to beds and borders, cottage gardens, wildlife gardens. Effective as an accent plant and spectacular in mass plantings.
  • Keep an eye out for slugs, snails or crown rot if grown in poorly drained soils.
  • Deadhead regularly to prolong flowering. Midsummer shearing (after the first flush of flowers) should help tidy up the plant and promote a fall rebloom.
  • Cut old stems back to their bases as they die back at the end of the year.
  • Clumps may be divided every 2-3 years to maintain robustness.
  • Propagate by seed at 55-60°F (13-16°C) in late winter or propagate by division in early spring or root basal cuttings in spring.

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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, Partial Sun
Season of Interest Summer (Early,Mid,Late)
Fall
Height 1' – 2' (30cm – 60cm)
Spread 1' – 2' (30cm – 60cm)
Spacing 12" – 18" (30cm – 45cm)
Water Needs Low, Average
Maintenance Low
Soil Type Chalk, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Cut Flowers, Plant of Merit, Showy
Tolerance Deer, Drought, Rabbit, Dry Soil, Rocky Soil
Attracts Butterflies
Garden Uses Beds and Borders
Garden Styles Informal and Cottage, Prairie and Meadow

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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, Partial Sun
Season of Interest Summer (Early,Mid,Late)
Fall
Height 1' – 2' (30cm – 60cm)
Spread 1' – 2' (30cm – 60cm)
Spacing 12" – 18" (30cm – 45cm)
Water Needs Low, Average
Maintenance Low
Soil Type Chalk, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Cut Flowers, Plant of Merit, Showy
Tolerance Deer, Drought, Rabbit, Dry Soil, Rocky Soil
Attracts 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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