Coreopsis verticillata

RHS Plant Profile

whorled tickseed

Other common names

thread-leaf coreopsis, whorled coreopsis

Herbaceous Perennial

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A rhizomatous, clump-forming perennial to around 80cm tall with dark green leaves finely-divided into three thread-like parts. Golden-yellow flowers up to 5cm wide are borne on branched stems from summer into early autumn

Position

Full sun, Partial shade

Soil Types

Loam, Sand, Chalk

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.1-0.5 metres
Max Height: 0.5-1 metres

Growing Conditions

Loam Sand Chalk

Moisture: Moist but well–drained or Well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun Partial shade

Aspect: East–facing or South–facing or West–facing
Exposure: Exposed or Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H5

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Asteraceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Clump forming
Genus: Coreopsis can be annuals or perennials, with paired, simple, palmate or pinnately divided leaves and long-stalked, daisy-like flower-heads
Name Status: Correct
Plant Range: E Canada to SE USA

How to Grow

Cultivation

Grow in fertile, well-drained soil in full sun or partial shade

Propagation

Propagate by seed, sown at 13-16°C in late winter or propagate by division in early spring or root basal cuttings in spring

Suggested planting locations and garden types

Cottage and informal garden
Prairie planting
Wildlife gardens
Wildflower meadow
City and courtyard gardens
Cut flowers
Flower borders and beds

Pruning

Cut old stems back to their bases as they die back at the end of the year

Pests

May be susceptible to slugs and snails

Diseases

Generally disease-free