= Water twice per month or less, once established.
= Water about once per week, once established.
= Water about twice per week, once established.
= Water three days per week, or more.
Use the plant water needs as a guideline. Actual plant water needs will vary for several reasons, including weather conditions, soil type, sun exposure, root depth, wind and elevation. Adjust your watering schedule as needed to meet the plants' needs at your site. Water recent transplants more often than established plants.
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Iris sibirica
moderate
blue-purple
early summer
1 to 2 ft.
1 to 2 ft.
No
Russia, central Europe
sun
USDA zones 3-8
hardy to 9,000 ft.
Siberian iris is an upright perennial flower with narrow dark green-like leaves. Attractive, 3-inch wide flowers appear on sturdy, branches stems in early summer.
Flower color depends on the cultivar, usually being, blue, purple, white and yellow. Siberian iris grows best in moist soil. They will survive in drier areas, but will be smaller in size and flower less.
The leaves of Siberian iris are much narrower than bearded iris.
Different siberian iris cultivars have been planted at the Xeriscape Demonstration Garden. They are smaller than most bearded iris, and have attractive "beardless" flowers. The leaves are darker green and narrower than bearded iris.
If we don't divide them regularly, bloom quality falls declines. Nonetheless, if given regular moisture, the pretty flowers, dark green leaf color, upright habit, and narrow width of the leaves makes them an attractive choice.
Siberian iris needs to be divided periodically when the center dies out, ideally every three to four years in August. Cut back the old leaves in fall or early spring. Cut back the flower stalk after flowering.
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