Botanical Name

Iris sibirica 'Caesar's Brother'

Commonly known as Caesar's Brother Siberian Iris

Perennial

Tall stems hold rich violet-blue flowers above grassy foliage. The Siberian iris benchmark, blooming earlier and longer than bearded types.

Toxic to cats

Toxic to cats and dogs, the rhizome most of all. Vomiting, drooling and diarrhoea are the usual signs.

Handle with care

The rhizomes irritate skin and are the most poisonous part if eaten. Wear gloves to lift or divide a clump.

Quick Reference

Bloom Season: May to Jun
USDA Zones: 3-9
Sun: Full Sun or Part Sun
Water: Moderate - regular watering
Mature Height: 3-4'
Bloom Colors: PurpleBlue

△ Deer Resistant✂ Cut Flower✿ Pollinator Friendly✦ Low Maintenance

Read the full Caesar's Brother Siberian Iris growing guide →

Companion plants, planting tips, FAQ, and more

About This Name

Iris sibirica 'Caesar's Brother' is the scientific name used by botanists, nurseries, and seed catalogs to identify Caesar's Brother Siberian Iris unambiguously. The genus Iris places it within a specific plant family, and using the botanical name avoids the confusion that comes with regional common names. If you're shopping for Caesar's Brother Siberian Iris, looking up plant care details, or comparing varieties, searching by Iris sibirica 'Caesar's Brother' will give you the most precise results.