Siberian flag iris, Iris sibirica, produces small, delicate flowers and narrow, bright green foliage. Flower petals are purple with white and yellow markings. It makes an excellent cut flower.
Iris sibirica ‘Blue King’ bears deep violet flowers with veined yellow throats, in May and June. Like all Siberian flag irises, it’s a rhizomatous, clump-forming perennial, requiring space to spread out.
Grow Iris sibirica ‘Blue King’ in moist, neutral to slightly acidic soil in sun or partial shade. It looks best planted beside water, such as beside a pond. Divide clumps from midsummer to early autumn.