Species Crocus, Autumn Crocus, Fall Crocus
Crocusthomasii

Family: Iridaceae (eye-rid-AY-see-ee)
Genus: Crocus (KROH-kus)
Species: thomasii (to-MAS-ee-eye)

Synonym:Crocus visianicus

Category
Bulbs

Water Requirements
Average Water Needs; Water regularly; do not overwater

Sun Exposure
Sun to Partial Shade
Light Shade

Foliage
Herbaceous
This plant is resistant to deer
Smooth

Foliage Color
Blue-Green

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)

Where to Grow

Danger
Parts of plant are poisonous if ingested
Handling plant may cause skin irritation or allergic reaction

Bloom Color
Lavender

Bloom Characteristics

Bloom Size

Bloom Time
Mid Fall

Other details

Soil pH requirements
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information
Non-patented

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

Seed Collecting
Allow pods to dry on plant; break open to collect seeds