Add elegant late-spring color with Iris sibirica 'Butter & Sugar' (Siberian Iris 'Butter & Sugar'). This Siberian iris forms a tidy, arching clump of narrow, grasslike leaves and sends up sturdy stems topped with bicolor flowers: creamy white standards above soft, buttery yellow falls.

Plant it where you can keep the soil consistently moist, especially in spring and early summer. It grows best in fertile, well-drained soil that stays evenly moist, but once established it will handle brief dry spells. Use it to brighten borders, along a pond edge, or anywhere you want a refined, vertical accent that does not flop.

Give it full sun for the best bloom, though it will also perform well in part shade. Expect mature height around 28-36 inches with a spread of about 24-30 inches as the rhizomes slowly enlarge into a broader clump. In cold-winter climates, the plant benefits from winter chill for reliable flowering.

After a few seasons, divide crowded clumps to refresh vigor and increase your planting. Cut back old foliage after frost if desired, and keep the crown at soil level. Flowers attract pollinators such as butterflies, making this a beautiful and wildlife-friendly choice for the perennial garden.

Specifications

• Cold hardiness zone: 3-8 (-40 degrees F) - Contact your local extension to confirm hardiness if you are in a fringe zone (we cannot guarantee hardiness in fringe zones)
• Light: Full sun   Part sun
• Growth rate: Fast
• Mature height: 28-36"
• Spread: 24-30"
• Attracts: Butterflies

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