Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Cultivar: Dark Crystal
Hybridized by Byers; Year of Registration or Introduction: 1987
» View all varieties of Iris  5 members have or want this plant for trade.
Class:
Standard Dwarf Bearded (SDB)
Height:
6-12 in. (15-30 cm)
12-18 in. (30-45 cm)
Spacing:
12-15 in. (30-38 cm)
15-18 in. (38-45 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)
Sun Exposure:
Full Sun
Sun to Partial Shade
Danger:
Parts of plant are poisonous if ingested
Handling plant may cause skin irritation or allergic reaction
Bloom Color:
Purple
Dark Purple/Black
Bloom Time:
Midseason (M)
Reblooming (Re)
Foliage:
Herbaceous
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)
7.6 to 7.8 (mildly alkaline)
Patent Information:
Non-patented
Propagation Methods:
By dividing rhizomes, tubers, corms or bulbs (including offsets)
Allow cut surface to callous over before planting
Seed Collecting:
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
Awards (if applicable):
Honorable Mention
| 
