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Colchicum macrophyllum - Autumn crocus

Colchicum macrophyllum
Autumn Crocus

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More information

Rare Colchicum macrophyllum, with white flowers veined with pink.
Flower size
7 cm
Height at maturity
15 cm
Exposure
Sun
Hardiness
Hardy down to -23°C
Soil moisture
Moist soil
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Best planting time July to August
Recommended planting time July to September
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Flowering time September to November
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Description

Colchicum macrophyllum is a very rare perennial. From September to November pretty flowers emerge before the leaves, in white veined with pink. They measure 5 to 10cm (2 to 4in) in diameter and are adorned with 6 stamens with white filaments and brown to yellow anthers.

Known as large leaved colchicum, it has basal leaves that are absent at flowering (it is thus said to be nudiflorous). They persist until July and measure up to 40cm (16in) long. It has beautiful shiny and decorative foliage. Colchicum macrophyllum has good hardiness.

This autumn crocus measures between 5 to 20cm (2 to 8in) in height at maturity. It is suitable for sunny flower beds as well as hedges, rocky areas or thickets.

Plant habit

Height at maturity 15 cm
Growth rate normal

Flowering

Flower colour white
Flowering time September to November
Flower size 7 cm

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Safety measures

Potential risks Plant may be toxic if swallowed

Botanical data

Genus

Colchicum

Species

macrophyllum

Family

Liliaceae

Other common names

Autumn Crocus

Product reference81139111

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Planting and care

Colchicum macrophyllum thrives in full sun in fertile, moist, well-drained soil but not too dry. Reserve a depth of 15cm (6in) when planting and space the young plants 10 to 15cm (4 to 6in) apart. Plant colchicums in July-August so that they can flower in the first year of planting. After planting, leave them in place as they do not like to be disturbed. Water once a week during the growth period without wetting the leaves and flowers as this colchicum is prone to grey rot and slugs in humid weather. During summer dormancy, keep it dry. After flowering, they go dormant until spring and their leaves will bloom in May and completely disappear in July. The bulbs should not be consumed (they are toxic).

Planting period

Best planting time July to August
Recommended planting time July to September
Planting depth 15 cm

Intended location

Type of use Border, Hedge
Hardiness Hardy down to -23°C (USDA zone 6a) Show map
Planting density 100 per m2
Exposure Sun
Soil pH Any
Soil moisture Moist soil, well-drained

Care

Soil moisture Moist soil
Overwinter Can be left in the ground

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