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Iris 'Caesar's Brother' Plant of Merit

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Kemper Code:  D560

Common Name: Siberian iris
Zone: 3 to 8
Plant Type: Herbaceous perennial
Family: Iridaceae
Missouri Native: No
Native Range: None
Height: 3 to 4 feet
Spread: 2.5 to 3 feet
Bloom Time: May   Bloom Data
Bloom Color: Deep purple
Sun: Full sun to part shade
Water: Medium to wet
Maintenance: Low

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Plant Culture and Characteristics

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  Uses:       Wildlife:   Flowers:   Leaves:   Fruit:
Hedge Suitable as annual Attracts birds Has showy flowers Leaves colorful Has showy fruit
Shade tree Culinary herb Attracts Has fragrant flowers Leaves fragrant Fruit edible
Street tree Vegetable   hummingbirds Flowers not showy Good fall color   Other:
Flowering tree Water garden plant Attracts Good cut flower Evergreen Winter interest
Gr. cover (<1') Will naturalize   butterflies Good dried flower     Thorns or spines

General Culture:

Easily grown in average, medium to wet soil in full sun to part shade. An adaptable plant which tolerates a wide range of soils. It is best grown in very moist, fertile, slightly acid soil, including boggy conditions, but will also tolerate a poor, dry soil because its thick roots penetrate the soil deeply.

Noteworthy Characteristics:

This tall Siberian iris produces deep purple flowers in late spring on rigid stems which rise to 40" high above a clump of arching, narrow, grass-like, linear leaves. Clumps will grow together and snuff out weeds. After bloom, the vase-shaped foliage will retain its green color into the fall. Excellent cut flower, but lasts only 1-2 days. Morgan Award winner (1953).


No serious pest or disease problems. Siberian iris is less susceptible to iris borer and soft rot than the tall bearded iris.


Mixes well with other perennials and provides excellent color and contrast to the perennial border. Also effective when planted on a slope or hillside or along a stream or pond. Massed plantings or well-placed specimens can enhance almost any setting, and the foliage provides lasting beauty after bloom.

Missouri Botanical Garden, 2001-2011

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