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PlantFiles: Giant Dutch Crocus
Crocus vernus 'Negro Boy'

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Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Crocus (KROH-kus) (Info)
Species: vernus (VER-nus) (Info)
Cultivar: Negro Boy

One vendor has this plant for sale.

One member has or wants this plant for trade.

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Category:
Bulbs

Height:
under 6 in. (15 cm)

Spacing:
3-6 in. (7-15 cm)

Hardiness:
USDA Zone 3a: to -39.9 C (-40 F)
USDA Zone 3b: to -37.2 C (-35 F)
USDA Zone 4a: to -34.4 C (-30 F)
USDA Zone 4b: to -31.6 C (-25 F)
USDA Zone 5a: to -28.8 C (-20 F)
USDA Zone 5b: to -26.1 C (-15 F)
USDA Zone 6a: to -23.3 C (-10 F)
USDA Zone 6b: to -20.5 C (-5 F)
USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)

Sun Exposure:
Sun to Partial Shade
Light Shade

Danger:
N/A

Bloom Color:
Purple
Dark Purple/Black

Bloom Time:
Late Winter/Early Spring
Mid Spring

Foliage:
Silver/Gray
Smooth-Textured

Other details:
This plant is attractive to bees, butterflies and/or birds
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater
Suitable for growing in containers

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:
Unknown - Tell us

Propagation Methods:
By dividing rhizomes, tubers, corms or bulbs (including offsets)

Seed Collecting:
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Click thumbnail
to view:

By David_Paul
Thumbnail #1 of Crocus vernus by David_Paul

By David_Paul
Thumbnail #2 of Crocus vernus by David_Paul

By Gardening_Jim
Thumbnail #3 of Crocus vernus by Gardening_Jim

By Gardening_Jim
Thumbnail #4 of Crocus vernus by Gardening_Jim

Profile:

No positives
1 neutral
No negatives

Gardeners' Notes:

RatingAuthorContent
Neutral David_Paul On Mar 27, 2008, David_Paul from Clinton, CT (Zone 6b) wrote:

Similiar to c. vernus "Twilight". Purchased mine from Odyssey Bulbs. Also available from Old House Gardens. Some say "Twilight" and "Negro Boy" are one and the same.

Regional...

This plant has been said to grow in the following regions:

Juneau, Alaska
Garberville, California
Clinton, Connecticut
Vancouver, Washington



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