Scientific Name: Coreopsis verticillata
Common Name: threadleaf coreopsis, whorled tickseed
Family Name: Asteraceae
Origin: U.S. - southwest
Hardiness Zone: Zone 4: (-34 to -29 °C)
Plant Type: Herbaceous perennial
Mature Size: 0.4 - 0.7m x 0.3 - 0.6m (height x width)
Habit: Dense, Spreading
Form: Mounded
Texture: Fine
Landscape Uses: Attract beneficial insects, Attract butterflies, Container planting, Cut flower or foliage, Ground cover, Group or mass planting, Perennial border, Summer interest
Exposure: Full sun
Soil or Media: Rocky or gravelly or dry, Well-drained
Leaves: Dissected, Compound, Opposite, Soft flexible, Pinnate venation, Glabrous, Rhomboidal, Other, Incised, Pinnately lobed
Flowers: Head (capitulum), Yellow, Jun-Jul-Aug-Sep
Fruit: Cypsela (achene + calyx), Brown, Aug-Sep-Oct
Key ID Features:
Leaves very fine, 3-parted, with each lobed leaflet deeply incised to form mostly 5 thread-like segments; flowers up to 5cm wide, with 8 petal-like, golden yellow to creamy white (cvs.) ray florets with notched tips.