Japanese Iris
Iris ensata
- Native to:
- China, India, Japan, Kazakhstan, Korea, Russia
Photo by and (c)2007 Derek Ramsey ( Ram-Man (en.wikipedia.org) ). Co-attribution must be given to the Chanticleer Garden.
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Iridaceae
- Genus:
- Iris
- Species:
- Iris ensata
- USDA Symbol:
- IREN
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Geophyte
- Height:
- 120 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- Low
- Bloom Months:
- jun,jul
- Bloom Colors:
- purple, blue, white, pink, lavender, violet
Keystone Species Ranking
- Caterpillar Keystone:
- ★★☆☆☆ Butterfly & moth species supported by this genus (NWF)
Garden & Ecology Notes
- Wildlife Value:
- butterflies, hummingbirds
- Deer Resistant:
- Yes
Soil Requirements
- Soil Type:
- rich, moisture-retentive, acidic soil
- pH:
- 5.0 - 6.5 (acidic to slightly acidic)
- Drainage:
- tolerates poor drainage
- Moisture:
- consistently moist
- Notes:
- Prefers wetland or bog-like conditions
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 60–90 days
- Germination Time:
- 30–180 days
- Notes:
- Germination can be slow and erratic. Fresh seed germinates best; older seed may require longer cold stratification.
The above propagation data sourced from Claude AI
ORGHPS Germination Guide: Expose to fluctuation outdoor winter temperatures including freezing for 3 months. Gradually increase light and temperature in the spring. * sow fresh or soak old seed; prechill 4 weeks or place outdoors over winter and bring indoors once germinated to avoid temperature shock; transplant at 4 leaves