Aquilegia vulgaris 'William Guiness Doubles' (d)

RHS Plant Profile

columbine 'William Guiness Doubles'

Synonyms

Aquilegia vulgaris var. flore-pleno 'William Guiness Doubles'

Herbaceous Perennial

Short-lived, herbaceous perennial to 75cm with divided, blue-green leaves with rounded leaflets. Nodding, double, very dark purple flowers, with short spurs and petals bordered in pale purple to white, appear in late spring and early summer

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

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

Chalk Clay Loam Sand

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

Position

Full sun Partial shade

Aspect: East–facing or South–facing or West–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): H7

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Ranunculaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Clump forming
Genus: Aquilegia are clump-forming herbaceous perennials with long-stalked, ternately divided basal leaves and erect, leafy stems bearing bell-shaped flowers with spreading, coloured sepals and petals with spurs, on branched stems
Name Status: Accepted

How to Grow

Cultivation

Grow in fertile, moist but well-drained soil in full sun or partial shade. See aquilegia cultivation

Propagation

Propagate by seed; home-saved seed may not come true. Established plants can also be propagated by division in spring, but they dislike root disturbance and will be slow to recover

Suggested planting locations and garden types

Cottage and informal garden
Patio and container plants
Cut flowers
Flower borders and beds
Underplanting of roses and shrubs

Pruning

To encourage more flowers (and prevent self-seeding) deadhead regularly. Cut back foliage after flowering to promote fresh growth in late summer

Pests

May be susceptible to aphids, caterpillars, leaf miners, aquilegia gall midge and aquilegia sawfly

Diseases

May be susceptible to powdery mildews and aquilegia downy mildew