| Description | The white Japanese Roof Iris (Iris tectorum Alba) is a crested Iris with white flowers. Prefers moist garden sites. The lilac-flowered Japanese roof Iris is more commonly grown. |
|---|---|
| Pronunciation | (EYE-ris)(tek-TOR-um) |
| Plant Type | Perennials Hardy, Bulbs, corms, tubers, rhizoms, etc. |
| Hardiness Zone | 4-9 |
| Sunlight | best in full sun, tolerate some shade |
| Moisture | average, moist |
| Soil & Site | organic, average, moist |
| Flowers | crested, yellow throat, midsummer |
| Fruit | capsule |
| Leaves | glossy green, broad, ribbed, sword-like |
| Stems | spreads by rhizomes |
| Dimensions | 12" tall, spreads by rhizomes to form clumps and become a ground cover |
| Maintenance | a heavy feeder will need to be fertilized |
| Propagation | division after flowering, may not come true from seeds |
| Native Site | China |
| Misc Facts | They are frequently called the 'roof iris' because it was grown in the thatched roof of Chinese and Japanese houses. |
| Notes & Reference | #04-Herbaceous Perennial Plants (Allan Armitage), #79-Perennials For Every Purpose (Larry Hodgson), #88-The Iris Book (Molly Price) |
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