Iris sibirica 'Butter and Sugar'
Common name: Siberian Iris.
Zones 3 to 9.
Full sun to part shade.
Plants reach 28 inches tall and 18 to 24 inches wide;
Herbaceous perennial clumps will grow together to inhibit weeds.
Growth rate: Moderate.
Creamy white standards and butter-yellow falls, both with greenish yellow veins on rigid stems rise above a clump of arching, narrow, grass-like, linear leaves. Blooms in early summer with a possible rebloom later in the season. Deadheading will not extend this variety's blooms.
American Iris Society Honorable Mention 1978
American Iris Society Award of Merit 1981
American Iris Society Morgan-Wood Medal (Best Siberian Iris) 1986