Siberian iris

If you’re looking for some elegant, graceful plants that don’t need a lot of fussing, you’ll love Siberian irises. When they bloom in late spring, the effect is enough to knock your socks off with flowers ranging from the deep blue-purple ‘Caesar’s Brother’ at left to lighter blues and purples, pink, maroon, yellow or white. Turn the page to meet some of the cultivars available.

Siberian Iris

Iris sibirica and hybrids

Type Perennial

Blooms Shades of blue, purple, white, maroon, yellow and pink in late spring to early summer

Light Full sun to part shade

Soil Moist to wet, well-drained, acid

Size 24 to 48 in. tall, 18 to 36 in. wide

Cold-hardy USDA zones 3 to 9

Heat-tolerant AHS zones 9 to 1

‘Caesar’s Brother’

If you’ve seen and admired a Siberian iris in another garden, it may have been this beautiful old favorite. Its striking deep blue-purple blooms are real attention getters. Not only that, it’s a vigorous cultivar that spreads quickly. ‘Caesar’s Brother’ grows 36 to 48 in. tall and 18 to 24 in. wide in cold zones 3 to 8 and heat zones 9 to 1.

‘Summer Sky’

This antique variety grows 24 to 30 in. tall and blooms in late spring in a sophisticated blend of pale blue, white and yellow.

‘Contrast in Styles’

This plant’s name says it all. You’ll want to get up close to examine the interesting mix of purple, white and yellow on this flower. ‘Contrast in Styles’ grows 32 in. tall.

‘Butter and Sugar’

‘Butter and Sugar’ was the first reliably yellow cultivar of Siberian irises and is still one of the best. This pretty plant grows 27 in. tall.

‘Pink Parfait’

Can’t get enough of your Siberian irises? Try a double variety, like ‘Pink Parfait. It grows 28 in. tall.

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