Siberian Iris 'Gull's Wing'

‘Gull’s Wing’ is a late-blooming Siberian iris introduced by William McGarvey in 1989. The selection has pure white flowers, a white signal, and stems reaching about 36 inches; its original record identifies seedling McG 1861 ([American Iris Society](https://wiki.irises.org/Sib/SibGullsWing), [University of Illinois Extension](https://web.extension.illinois.edu/hortanswers/plantdetail.cfm?PlantID=732&PlantTypeID=2)). ## Seasonal Interest Its airy, narrow green leaves form an upright clump, while the white flowers add a clear late-season display above the foliage. The American Iris Society records it as a late-blooming Siberian iris. Timing shifts with local climate; Siberian irises generally flower in late spring through early summer. ## Growing Conditions Plant in full sun or partial shade in fertile soil that remains evenly moist and drains well. Siberian irises tolerate moist and wet sites, though established plants prefer consistent moisture during spring growth and flowering. University of Illinois Extension describes the group as suitable for sun to light shade and notes that it tolerates wet sites. Do not translate the RHS hardiness rating into a USDA zone. ## Maintenance Water new plants regularly through establishment. After flowering, remove spent stems if seedheads are not wanted; leave healthy foliage to replenish the clump. Divide established clumps in early autumn or spring when they become crowded or flowering declines. The [RHS growing guide](https://www.rhs.org.uk/plants/iris/border/growing-guide) covers care and division for clump-forming irises.