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This clump-forming, herbaceous perennial has long, strap-like, grey-green leaves; deep purple-blue flowers have yellow markings and rise above the foliage on sturdy stems; quite cold tolerant; easy to grow; attracts butterflies and hummingbirds; deer resistant; drought tolerant once established.

deep purple-blue flowers have yellow markings

Elegant by water, in beds, borders, containers, mass plantings, cottage and water-wise gardens.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Iris sibirica 'Blue King'


(Blue King Iris)

Growing

Requirements

Zone

3 (-40°F/-40°C)

Exposure

Full sun to part shade

Form

Foliage Height

20" (51 cm)

Width

48" (122 cm)

Flower Height

48" (122 cm)

Flower Colour

Deep purple-blue flowers with yellow markings

Bloom Time

June-July

Watering Needs

Moderate-Low. Drought tolerant once established

Soil Preferences

Tolerates a wide range of soil types

Plant Care Tips

Caring for Siberian Irises is easy! They are very disease resistant and need very little attention. While they tolerates a wide range of soil, these irises do best in a rich soil containing organic material. Mulching will help conserve soil moisture in summer and will help keep down weeds. Fertilize the plants in early spring and after the bloom season. While Siberian Irises are surprisingly drought tolerant, they do best with regular watering, particularly during the spring. Removing the bloom stalks at the end of the season keeps the plants tidies up the plants nicely and keeps them from reseeding. Cut back the foliage to 1-2 inches above the ground only when it has gone dormant. Siberian Irises are long-lived (about 10 years). When the clumps produce fewers flowers, divide them (preferably in spring or, if necessary, late summer). New clumps will take about 3 years to establish and begin blooming profusely.

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