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Autumn Crocus, Fall Crocus
Crocus speciosus

Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Crocus (KROH-kus) (Info)
Species: speciosus (spee-see-OH-sus) (Info)
Synonym:Crocus speciosus subsp. speciosus

Category:

Bulbs

Height:

under 6 in. (15 cm)

Spacing:

3-6 in. (7-15 cm)

6-9 in. (15-22 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:

Full Sun

Sun to Partial Shade

Danger:

All parts of plant are poisonous if ingested

Handling plant may cause skin irritation or allergic reaction

Bloom Color:

Blue-Violet

Violet/Lavender

Bloom Time:

Mid Fall

Foliage:

Blue-Green

Other details:

Average Water Needs; Water regularly; do not overwater

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:

Non-patented

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

Regional

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

,

Garberville, California

Littleton, Colorado

Washington, Illinois

Olathe, Kansas

Thompsonville, Michigan

Croton On Hudson, New York

Ithaca, New York

New York City, New York

Wake Forest, North Carolina

Pembina, North Dakota

Fort Jennings, Ohio

Coos Bay, Oregon

Wilkes Barre, Pennsylvania

Broaddus, Texas

Spokane, Washington

show all

Gardeners' Notes:

1
positive
1
neutral
0
negatives
RatingContent
Neutral

On Apr 27, 2005, Kelli from L.A. (Canoga Park), CA (Zone 10a) wrote:

The flowers are so pretty but the plants don't last here very long. In a couple years they all die out.

Positive

On Oct 27, 2002, philomel from Castelnau RB Pyrenes
France (Zone 8a) wrote:

An easy plant, welcomed for it's colour in the autumn.
It looks very good set off by russet fallen leaves.