roof iris
Iris tectorum
USDA zones4 to 9
SunHandles full sun to partial sun
WaterNeeds moderate soil
Size12 to 18 inches tall12 to 18 inches wide
- Growth rate
- Moderate
- Habit
- Clumping
- Bloom season
- Spring
- Bloom color
- Deep lilac-blue purple with white crest
- Foliage color
- Green
Garden uses
Notes
Roof iris (Iris tectorum) is a clumping perennial for ground cover and cut flowers. It is hardy to USDA zone 4, or down to -30°F (-34°C). This plant likes full or part sun and average moisture. Deep lilac-blue purple flowers with a white crest open in early to late spring. It is not a favorite of deer, though hungry deer will eat almost anything. The clumps stay 12 to 18 inches tall.
Pairs well with Tree peony, Burnet, and Black Parrot tulip.
Native range
Central and southwestern China and Myanmar.