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Crocus speciosus
  • RHS AGM
  • RHS Plants for pollinators

Bieberstein's crocus

A cormous perennial that has silvery lilac-blue flowers in autumn, with darker veins and a white throat; leaves developing after the flowers

Other common names
large autumn crocus
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Size
Ultimate height
Up to 10cm
Time to ultimate height
2–5 years
Ultimate spread
0–0.1 metre
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring
Summer
Autumn Blue White Green
Winter
Position
  • Full sun
Aspect

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

Exposure
Exposed or Sheltered
Hardiness
H6
Botanical details
Family
Iridaceae
Native to GB / Ireland
No
Foliage
Deciduous
Habit
Tufted
Potentially harmful
Ornamental bulbs - not to be eaten. Wear gloves and other protective equipment when handling. Pets: Ornamental bulbs - not to be eaten - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Genus

Crocus are dwarf, deciduous perennials growing from a corm, with linear leaves usually with a silvery central stripe, and goblet-shaped, sometimes fragrant flowers in autumn or early spring

Name status

Correct

Plant range
Crimea Iran Turkey

How to grow

Cultivation

Grow in a gritty, poor to moderately fertile soil. Suitable for naturalising in grass, see bulbs: naturalising. See crocus cultivation for more advice

Propagation

Propagate by seed, sown in pots in a cold frame when ripe or remove cormlets when dormant

Suggested planting locations and garden types
  • Gravel garden
  • Patio and container plants
  • Rock garden
  • City and courtyard gardens
  • Wildlife gardens
  • Flower borders and beds
Pruning

No pruning required

Pests

May be susceptible to rodents and birds

Diseases

Generally disease-free, corms may rot in storage

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