Siberian iris
Iris sibirica
Also called Siberian flag
Garden plant · PerennialsNo beard on the falls, which is how you tell it from the bearded iris in this file — and it wants damp ground where that one wants a dry sunny bake.
Care at a glance
- Ease
- Easy
- Water
- Every 5 daysWater the ground — water at the base, in the morning, not over the leaves.
- Light
- Full sun to partial shade, in moist soil
- Feed
- Every 45 days
- Humidity
- Average
- Hardiness
- Very hardy RHS H7, to -25°C
- Size
- 1.25 m tall · 0.3 m across
- Lifecycle
- Perennial
- Origin
- Central Europe to Russia
Is it safe for pets and people?
PetsToxic to pets
Affects dogs, cats, horses.
PeopleHarmful if eaten
The rhizome most of all.
HandlingTake care handling it
RHS says to wear gloves and other protective equipment when handling it.
Checked against ASPCA and RHS on 2026-09-11.
A guide, not veterinary or medical advice. If a pet or a person has eaten a plant and you are worried, call your vet or doctor now — don’t wait for signs to appear. Spotted a mistake? Tell us.