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Crocus biflorus Blue Pearl - Crocus botanique Blue Pearl, Crocus de printemps

Crocus biflorus Blue Pearl

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Sarah, 19/03/2026

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Value-for-money
This small botanical crocus produces pearl-blue, cup-shaped flowers from February, almost white inside, around a yellow throat with orange stigmas. Each bulb, or corm, can bear several slightly fragrant flowers, clearly visible in a lawn, a rock garden, or at the foot of deciduous shrubs. Very hardy, it multiplies spontaneously over the years. Plant it in autumn, in full sun, in well-drained soil.
Flower size
3 cm
Height at maturity
12 cm
Spread at maturity
10 cm
Exposure
Sun
Hardiness
Hardy down to -20.5°C
Soil moisture
Dry soil, Moist soil
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Best planting time October to November
Recommended planting time September to December
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Flowering time February to March
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Description

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Spring crocus: planting, growing and care
Family sheet
by Alexandra 16 min.
Spring crocus: planting, growing and care
Read article

Crocus biflorus Blue Pearl - Crocus botanique Blue Pearl, Crocus de printemps in pictures

Crocus biflorus Blue Pearl - Crocus botanique Blue Pearl, Crocus de printemps (Flowering) Flowering
Crocus biflorus Blue Pearl - Crocus botanique Blue Pearl, Crocus de printemps (Plant habit) Plant habit

Plant habit

Height at maturity 12 cm
Spread at maturity 10 cm
Growth rate normal

Flowering

Flower colour blue
Flowering time February to March
Flower size 3 cm
Fragrance slightly scented,

Foliage

Foliage persistence Deciduous
Foliage colour dark green
Foliage description The foliage disappears before summer.

Botanical data

Genus

Crocus

Species

biflorus

Cultivar

Blue Pearl

Family

Iridaceae

Botanical synonyms

Crocus chrysanthus 'Blue Pearl', Crocus biflorus 'Blue Pearl'

Origin

Cultivar or hybrid

Product reference535591

Planting and care

Crocus chrysanthus ‘Blue Pearl’ can be planted from September to November, at a depth of 5 to 8 cm, with the same spacing between corms. Full sun encourages the flowers to open; the light shade of a deciduous tree is also suitable, as its branches are still bare at the time of flowering. The soil may be poor or chalky, but the water must drain away quickly. In clay soil, planting on a raised mound in a pocket of soil mixed with gravel prevents the corms from rotting. Watering after planting is sufficient if the autumn is dry; once planted in open ground, rainfall then takes over. No watering is needed during the summer rest period. The leaves must turn completely yellow before being cut or mown, as they replenish the corm's reserves. Clumps that have become too congested can be divided in summer, once the foliage has died back. When growing in containers, a wide pot with drainage holes in the bottom and a very free-draining growing medium are essential.

Planting period

Best planting time October to November
Recommended planting time September to December
Planting depth 5 cm

Intended location

Suitable for Meadow, Woodland edge
Type of use Edge of border, Container
Hardiness Hardy down to -20.5°C (USDA zone 6b) Show map
Ease of cultivation Amateur
Planting density 100 per m2
Exposure Sun
Soil pH Neutral, Calcareous
Soil moisture Dry soil, Moist soil, well-drained

Care

Pruning No pruning necessary
Soil moisture Dry soil, Moist soil
Disease resistance Good
Overwinter Can be left in the ground
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