Pardanthopsis dichotoma
Iris dichotoma
- Native to:
- China, Korea, Russia
peganum (www.flickr.com)
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Iridaceae
- Genus:
- Iris
- Species:
- Iris dichotoma
- USDA Symbol:
- PADI26
Growth Characteristics
- Height:
- 100 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- Medium
- Bloom Months:
- jul,aug,sep
- Bloom Colors:
- white, purple, blue
Keystone Species Ranking
- Caterpillar Keystone:
- ★★☆☆☆ Butterfly & moth species supported by this genus (NWF)
Garden & Ecology Notes
- Wildlife Value:
- bees, butterflies
- Deer Resistant:
- Yes
Soil Requirements
- Soil Type:
- well-drained, sandy or loamy soil
- pH:
- 6.0 - 7.5 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
- Notes:
- native to rocky or sandy slopes
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 30–60 days
- Germination Time:
- 14–30 days
- Notes:
- Seeds benefit from cold stratification for 4-8 weeks; sow in fall or after cold treatment.
ORGHPS Germination Guide: Sow @ 20°C. Seed germinates within 3 months Requires soaking. Place in warm water until seeds swell, usually 24-48 hours. Discard water and any seeds that remain floating. * rots if too wet; seeds at milk stage rot without germinating; seeds at dough stage can germinate and have rather high germination rate; fully ripe seeds germinate without dormancy. Soak and rinse in clean water daily x 4 weeks