Coreopsis grandiflora 'Kelvin Harbutt'

RHS Plant Profile

tickseed 'Kelvin Harbutt'

RHS

Herbaceous Perennial

A tall perennial with finely divided dark green foliage and bearing abundant brown-centred, single yellow daisies from late spring to early autumn

Position

Full sun, Partial shade

Soil Types

Chalk, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

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

Growing Conditions

Chalk Loam Sand

Moisture: Well–drained
pH: Alkaline or Neutral

Position

Full sun Partial shade

Aspect: West–facing or South–facing
Exposure: 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: Bushy
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

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

Propagation

Divide in early spring or propagate by basal cuttings in spring

Suggested planting locations and garden types

Coastal
Cottage and informal garden
City and courtyard gardens
Prairie planting
Wildlife gardens
Flower borders and beds

Pruning

Deadhead to prolong flowering

Pests

Slugs and snails may be troublesome

Diseases

Generally disease-free