Coreopsis grandiflora 'Double the Sun'

RHS Plant Profile

large-flowered tickseed 'Double the Sun'

Herbaceous Perennial

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A bushy and clump-forming perennial with elongated, lance-shaped green leaves and abundant daisy-like, large, semi-double, golden-yellow flowers with toothed petals held on stalks just above its foliage. An early flowering cultivar providing blooms for a long period of time from spring to late summer

Position

Full sun, Partial shade

Soil Types

Chalk, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

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

Growing Conditions

Chalk Loam Sand

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: Accepted

How to Grow

Cultivation

Will grow well in fertile, well-drained soil in partial shade but preferably in full sun. Will need to be kept moist during spells of dry weather.

Propagation

Propagate by seed in late winter, by division in spring or autumn and basal root cuttings in spring.

Suggested planting locations and garden types

Wildlife gardens
Patio and container plants
Cottage and informal garden
City and courtyard gardens
Flower borders and beds

Pruning

Deadhead for continuous flowering and cut back in winter.

Pests

May be susceptible to slugs and snails

Diseases

Generally disease-free