Cyclamen coum subsp. coum f. coum (Silver Group) 'Heavy Metal'

RHS Plant Profile

cyclamen 'Heavy Metal'

Bulbs

A tuberous perennial to 10cm high, with rounded dark green leaves, silvered almost to the edges, appearing from autumn to spring. Pale pink flowers with spreading petals open from early winter to early spring

Position

Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

Up to 10 cm

Max Spread

0-0.1 metre

Size

Time to Maturity: 1–2 years
Max Spread: 0-0.1 metre
Max Height: Up to 10 cm

Growing Conditions

Chalk Clay Loam Sand

Moisture: Well–drained
pH: Acid or Alkaline or Neutral

Position

Partial shade

Aspect: East–facing or North–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): H5

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Primulaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Clump forming
Potentially harmful: Ornamental bulbs, not to be eaten. Wear gloves and other protective equipment when handling Pets: Ornamental bulbsnot to be eaten - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Genus: Cyclamen are tuberous perennials with rounded, sometimes angular, leaves which are often attractively mottled. The nodding, characteristically shaped flowers have 5 reflexed and twisted petals, often with dark markings at the base
Name Status: Accepted

How to Grow

Cultivation

Plant 5cm deep in moderately fertile, humus-rich, well-drained soil. Avoid excessive summer moisture and mulch well when leaves wither. See hardy cyclamen cultivation

Propagation

Propagate by seed sown in darkness as soon as ripe. Can be beneficial to soak seed for 10 hours prior to sowing

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Patio and container plants
Rock garden
Low Maintenance
Banks and slopes
Flower borders and beds
Underplanting of roses and shrubs

Pruning

No pruning required

Pests

May be susceptible to mice and squirrels

Diseases

May be susceptible to cyclamen grey mould, particularly when grown under glass