Iris sibirica Caesars Brother (Siberian Iris)

Iris sibirica ‘Caesar’s Brother’ (Siberian Iris) is a clump-forming perennial with stunning, deep, velvety violet flowers from late spring to early summer. Introducing drama in the garden, each sturdy flower stalk produces many dainty blossoms, well above the foliage of upright, grassy, swordlike leaves. After blooming, the grass-like foliage remains fresh-looking and attractive all season.

Iris sibirica 'Caesar's Brother' (Siberian Iris) is a clump-forming perennial with stunning, deep, velvety violet flowers from late spring to early summer. Introducing drama in the garden, each sturdy flower stalk produces many dainty blossoms, well above the foliage of upright, grassy, swordlike leaves. After blooming, the grass-like foliage remains fresh-looking and attractive all season. Spectacular when planted in groups, this lovely Siberian Iris adds drama and vertical interest to the landscape.

  • Recipient of many prestigious awards, including Morgan Award (1953), which is the highest award reserved exclusively for Siberian Irises within the American Iris Society.
  • Grows up to 36-42 in. tall (90-105 cm) and 18-24 in. wide (45-60 cm).
  • Performs best in full sun or part shade, in average, medium to wet soils. Shade is tolerated, but the flowering performance may be altered. While this lovely iris enjoys a wide range of soils, slightly acidic soil is where this plant will thrive. Drought tolerant, even though this iris prefers adequate moisture.
  • Among the most trouble-free and low maintenance plants in the garden, Siberian Irises are deer resistant.
  • A welcomed addition to beds and borders or near streams or ponds, where it provides excellent color contrast.
  • The best time to plant Siberian Irises is spring or late summer.
  • Propagate by division of rhizomes from midsummer to early fall
  • All parts may cause discomfort if ingested. Wear gloves and other protective equipment when handling.
  • Toxic to dogs, toxic to cats, toxic to horses.
  • Iris sibirica is a rhizomatous herbaceous perennial, from Europe (including France, Italy, Switzerland, Austria, Czech Republic, Slovakia, Germany, Hungary, Poland, Romania, Bulgaria, Former Yugoslavia, Belarus, Estonia, Latvia, Lithuania, Moldova, Ukraine and northern Turkey) and Central Asia (including Armenia, Azerbaijan and Siberia).

Requirements

Hardiness 3
– 8

Heat Zones 1
– 9

Climate Zones 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23
Plant Type Perennials
Plant Family Iris Sibirica – Siberian Irises
Exposure Full Sun, Partial Sun
Season of Interest Spring (Late)Summer (Early)
Height 3'
– 4'
(90cm
– 120cm)
Spread 1'
– 2'
(30cm
– 60cm)
Spacing 18″
– 24″
(45cm
– 60cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Cut Flowers, Plant of Merit, Showy
Tolerance Clay Soil, Deer, Drought, Rabbit, Wet Soil
Attracts Hummingbirds
Garden Uses Beds and Borders, Bog Gardens, Ponds and Streams, Rain Gardens
Garden Styles City and Courtyard, Coastal Garden, Informal and Cottage