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Colchicum × ambiguum

A hybrid, autumn-flowering cormous perennial with strap-like green leaves appearing in the spring, after the funnel-shaped, lilac to pale pink flowers

Synonyms
Colchicum × tenorei misapplied
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Size
Ultimate height
0.1–0.5 metres
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Green
Autumn Pink Purple
Winter
Position
  • Full sun
Aspect

East–facing or South–facing or West–facing

Exposure
Sheltered
Hardiness
H5
Botanical details
Family
Colchicaceae
Native to GB / Ireland
No
Foliage
Deciduous
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

Colchicum are cormous perennials with usually coarse, broadly strap-shaped leaves which appear with or after the goblet-shaped flowers

Name status

Correct

How to grow

Cultivation

Plant 10cm deep, moist but well-drained, deep, humus-rich, fertile soil in an open site in full sun in summer or early autumn. Intolerant of waterlogging. See bulb cultivation for further advice

Propagation

Separate corms when dormant in summer

Suggested planting locations and garden types
  • Cottage and informal garden
  • Gravel garden
  • Rock garden
  • Wildlife gardens
  • Flower borders and beds
  • Underplanting of roses and shrubs
  • Wall side borders
Pruning

No pruning required

Pests

May be susceptible to slugs

Diseases

May be susceptible to grey moulds (Botrytis), smuts, and tulip grey bulb rot

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