Perennials

Iris sibirica 'Butter and Sugar'

Butter and Sugar Siberian iris

Iris sibirica 'Butter and Sugar' Photo courtesy of Walters Gardens, Inc.

Cream-white upright petals sit above butter-yellow falls. Narrow green foliage remains useful after the early-summer flowers. Grow in rich, slightly acidic soil is ideal.

At a glance

Sun: Full sun to part shade
Mature size: 28 in. tall × 18–24 in. wide
Water: Consistently moist; well drained
Hardiness: USDA zones 3–9
Bloom: Cream and yellow; early summer, possible later rebloom.

Sizes & prices

#1$14.99

Catalog updated September 8, 2026. This is not a live stock count; please call to confirm availability and price.

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Resistance & tolerances

Drought: Keep watered for best appearance.
Wet soil: Moist soil with drainage; avoid stagnant water.
Black walnut: Listed as tolerant.
Deer & rabbits: Resistant, not browse-proof.

Resistance is not a guarantee; deer and rabbits may browse any plant.

Pollinators & wildlife

Attracts: Bees, Hummingbirds

Keep in mind: Harmful if eaten; sap can irritate skin. Wear gloves when dividing.

Growing & care

Division: Divide only when flowering declines; allow time to reestablish.
Flowers: Deadheading does not extend the flowering period.
Fall cleanup: After a hard frost, remove old leaves, stems and nearby debris to reduce overwintering iris-borer eggs.

Sources & photo credits

Walters Gardens

NC State Extension

University of Minnesota Extension

Photo: Photo courtesy of Walters Gardens, Inc. · Authorized promotional use

Reviewed September 21, 2026. Growing conditions vary by location.