Siberian Iris — Growing reference
| Scientific name | Iris sibirica |
|---|---|
| Seed germination (days) | 21–42 |
| Soil temperature for germination (°C) | 12.8–18.3 |
| First harvest or flowering (days) | 365–730 |
| Measured from | Transplant |
| Plant spacing (cm) | 45.7–61 |
| Mature height (cm) | 61–121.9 |
| Mature spread (cm) | 45.7–61 |
| USDA hardiness zones | 3–9 |
| Light | Partial sun |
| Water | Moderate |
| Sowing method | Transplant |
Growing directions
Plant rhizome divisions in early spring (just as growth begins) or fall, setting just below the soil surface in moist, slightly acidic to neutral, well-drained to moderately wet soil in partial shade to full sun; Siberian iris tolerates wet soils and partial shade far better than bearded iris and requires much less maintenance. Iris sibirica is widely considered the most refined and garden-worthy of all the iris species, producing slender, grass-like, attractive foliage throughout the season and elegant, five-inch flowers with gracefully drooping falls in shades of violet-blue, purple, white, pink, and yellow in late May to June; unlike bearded iris, it rarely needs dividing (every 5-7 years only), is disease-resistant, and is virtually deer-proof. It thrives at pond margins, in rain gardens, and in consistently moist borders; the attractive, upright seedpod clusters provide winter interest and self-seeding; it is an outstanding cut flower with slender, upright foliage that remains attractive all season.
Source and local conditions
Typical planning ranges from OpenPlantDB (CC0). Cultivar, climate, season and growing method can change these values. Confirm the seed label and local guidance before planting.
Source & verification
OpenPlantDB · CC0