Siberian Iris
Iris sibirica
Elegant blue-violet flowers in late spring above upright, grassy foliage that stays handsome all season, on one of the easiest irises to grow. Deer and rabbits leave it be. It loves moist soil, even a rain garden, but not standing water.
- Mature size
- 3 × 2.5 ft
- 0.9 × 0.8 m, tall × wide
- Hardiness
- Zones 3a–8b
- USDA
- Sun
- Full sun to part sun
- Water
- Medium to moist
- Blooms
- May–Jun
Siberian Iris at its mature size
A mature Siberian Iris grows 2 to 4 feet tall and 2.5 to 3 feet wide.
Drawn to scale beside a 5 ft 9 in person. With VeraScape, you see it at this size in your own yard.
Typical mature size, unpruned. Sources: NC State Extension, Clemson Extension.
Through the year
What Siberian Iris looks like month by month in a typical zone 6–7 garden.
Below ground · Dec–Mar
Dies back to the ground over winter.
In leaf · Apr, Jul–Sep
Upright grassy leaves with seed pods, no flowers.
In flower · May–Jun
Blue-violet flowers just above the leaves.
Fall · Oct–Nov
Leaves turned tan and golden.
Growing Siberian Iris
- Grows well in
- The Northeast, the Midwest, the Plains and Mountain West, and the Pacific Northwest.
- Growth rate
- Fast
- Good for
- Rain garden and fast growing
- Leaves
- Dies back in winter
- Native to
- Central and Eastern Europe
Spacing
VeraScape spaces plants so their grown canopies just touch. For Siberian Iris, that’s about 2.5 ft apart, center to center.
Place a row in your own yard and VeraScape spaces them at their mature width, so you can see whether they’ll crowd the walk.
See Siberian Iris in your yard before you dig
Visualize it at its true size, alongside the rest of your design.