Species Iris, Black Iris, Velvet Flower-de-Luce, Snake's Head Iris, Widow Iris
Iristuberosa

Synonym:Hermodactylus tuberosus

Height

Spacing
12-18 in. (30-45 cm)

Hardiness
3-6 in. (7-15 cm)

Sun Exposure
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)

Danger
Full Sun

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

Foliage
Pale Green
Dark Purple/Black

Other details
Late Winter/Early Spring
Mid Spring
Late Spring/Early Summer

Propagation Methods
Herbaceous

Seed Collecting

Soil pH requirements
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From seed; direct sow after last frost

Patent Information

Class
Allow pods to dry on plant; break open to collect seeds

Bloom Time

Awards (if applicable)

Foliage Color

Bloom Characteristics
Alpines and Rock Gardens

Water Requirements

Where to Grow