Digitalis grandiflora 'Carillon'

RHS Plant Profile

foxglove 'Carillon'

John Fielding

Synonyms

Digitalis ambigua 'Carillon'

Herbaceous Perennial

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A compact, clump-forming perennial to 60cm high, with ovate, finely toothed evergreen leaves. In summer, produces spikes of tubular, pale yellow flowers with light tan veining inside

Position

Full shade, 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: 1–2 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 or Well–drained
pH: Acid or Alkaline or Neutral

Position

Full shade Full sun Partial shade

Aspect: East–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: Plantaginaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Clump forming
Potentially harmful: TOXIC if eaten. Wear gloves and other protective equipment when handling TOXIC to pets - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Genus: Digitalis can be biennials or usually short-lived perennials forming a rosette of simple leaves with bell-shaped flowers in slender, erect, usually one-sided racemes
Name Status: Accepted

How to Grow

Cultivation

Will grow in almost any soil or situation except very wet or very dry; ideally a sheltered, warm site with humus-rich soil in light or partial shade. See foxglove cultivation for more detailed advice

Propagation

Propagate by seed sown in pots in a cold frame in late spring, or by division in early spring

Suggested planting locations and garden types

Cottage and informal garden
Wildlife gardens
Banks and slopes
Flower borders and beds

Pruning

Cut back after flowering

Pests

May be susceptible to aphids and leaf and bud eelworm

Diseases

May be susceptible to leaf spot and powdery mildews