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Herbaceous PerennialAlpine Rockery

Phyteuma nigrum

black horned rampion

A small alpine perennial to a height of 30cm, with a basal rosette of narrow heart-shaped green leaves and deep spiky-looking, but soft, blue-purple cone-shaped flowers on long stems in summer

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Plant nurseries
3 suppliers

Ultimate height

0.1–0.5 metres

Time to ultimate height

2–5 years

Ultimate spread

0.1–0.5 metres

Chalk

Sand

Loam

Moisture

Well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun
Partial shade

Aspect

East–facing or North–facing or West–facing or South–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)

Botanical details

Family: Campanulaceae
Native to GB / Ireland: No
Foliage: Deciduous
Habit: Clump forming
Genus: A genus of flowering herbaceous perennials, native to Europe and Morocco. Foliage is alternate and petiolate, varying in shape between cultivars. Flowers are produced in dense panicles with narrow, five-lobed corolla and are mostly purple, but sometimes pale blue, white or pink
Name status: Correct
Plant range: C Europe

How to grow

Cultivation

Ideal for rock garden or scree in well drained soil in sun or part shade

Propagation

Propagate by seed in autumn in sheltered position or cold frame

Suggested planting locations and garden types

Cottage and informal garden
Gravel garden
Rock garden
City and courtyard gardens
Low Maintenance
Garden edging
Wall side borders
Flower borders and beds

Pruning

No pruning required

Pests

May be susceptible to damage by slugs and snails

Diseases

Generally disease-free

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