Alphabetical Plant Listing

Iris sibirica 'Butter and Sugar' (Siberian Iris)

Siberian Iris 'Butter and Sugar', Siberian Flag 'Butter and Sugar'


Iris sibirica 'Butter and Sugar' (Siberian Iris) is a top choice in terms of Siberian Irises with its white standards and unique, bright yellow falls, enlivening the landscape from late spring to early summer. Each flower stalk produces many dainty blossoms. After blooming, the grass-like foliage, consisting of sturdy clumps of upright green, narrow and fairly rigid, blade-shaped leaves, is also one of its most attractive garden features.

  • Recipient of many prestigious awards, including the Morgan Award (1986), which is the highest award reserved exclusively for Siberian Irises within the American Iris Society.
  • Grows up to 24-30 in. tall and wide (60-75 cm).
  • Performs best in full sun or part shade, in moist, fertile, humusy, organically rich, neutral to slightly acidic, well-drained 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, city gardens, coastal gardens, cottage gardens, rain gardens, 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).

Irises: How to Grow and Care with Success

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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 Iris
Exposure Full Sun, Partial Sun
Season of Interest Spring (Late)
Summer (Early)
Height 2' – 3' (60cm – 90cm)
Spread 2' – 3' (60cm – 90cm)
Spacing 30" (75cm)
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 Butterflies
Garden Uses Beds and Borders, Bog Gardens, Ponds and Streams, Rain Gardens
Garden Styles City and Courtyard, Coastal Garden, Informal and Cottage, Japanese Garden

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Walter Gardens Inc

While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.


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 Iris
Exposure Full Sun, Partial Sun
Season of Interest Spring (Late)
Summer (Early)
Height 2' – 3' (60cm – 90cm)
Spread 2' – 3' (60cm – 90cm)
Spacing 30" (75cm)
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 Butterflies
Garden Uses Beds and Borders, Bog Gardens, Ponds and Streams, Rain Gardens
Garden Styles City and Courtyard, Coastal Garden, Informal and Cottage, Japanese Garden

Great Plant Combination Ideas with Iris Sibirica - Siberian Iris

Guides with Iris Sibirica - Siberian Iris

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