Plant FinderPlant Finder Graphic
Siberian iris ‘Caesar’s Brother’
Siberian iris ‘Caesar’s Brother’

Click to Enlarge

Zones 1-10, 14-23, 32-45
Full SunPartial Sun
Full, Partial
Regular Water
Siberian iris ‘Caesar’s Brother’
Siberian iris ‘Caesar’s Brother’

Iris hybrid (Siberian)

Siberian Iris
Bulbs and bulblike plants, Perennials, Flowers


A large and remarkably diverse group of 200 to 300 species, varying in flower color and form, cultural needs, and blooming periods (although the majority flower in spring or early summer). Leaves are swordlike or grasslike. Flowers (fragrant, in many kinds) are showy and complex in structure.

Iris hybrid (Siberian)

The most widely sold members of this group are named hybrids derived from I. sibirica and I. sanguinea (formerly I. orientalis)—species native to Europe and Asia. Clumps of narrow, almost grasslike leaves (deciduous in winter) produce slender stems to 4 ft. high (depending on the variety), each bearing two to five blossoms with upright standards and flaring to drooping falls. Colors include white and shades of blue, lavender, purple, wine, pink, and light yellow.

Give plants full sun (partial or dappled shade where summer is hot) and neutral to acid soil. Set rhizomes 1–2 in. deep, 1–2 ft. apart. In cold-winter regions, plant in early spring or late summer; plant in autumn in milder regions. Water liberally from the onset of growth until several weeks after bloom. Divide infrequently—when clumps show hollow centers—at the best planting time for your region.

You Might Also Like...

Aquilegia vulgaris Clementine Mix

This strain grows clumps 12–16 in. tall and wide, with flowers rising several inches higher. Upw...

Aquilegia vulgaris ‘Woodside Gold’

Grows 20 in. tall and wide, with gold and green variegated foliage. You can get selections with blue, ...

Aquilegia vulgaris

Native to Europe. Plants grow 1–3 ft. tall. Nodding flowers to 2 in. across; short, knobby spurs...

Find Your Sunset Climate Zone

Find Your Sunset Climate Zone

View Maps Learn More