Iris sibirica 'DOUBLE STANDARD' Siberian iris
size/type
mid-sized perennial,mid-sized perennial
usual height
0,7-0,8m
leaves
deciduous broadleaf
colour of leaves
flowers
showy
colour of flowers
blooming time
May-June
location
full sun
USDA zone (lowest)
3 (down to -40°C)
winter protection
for zone 5+6
for zone 7
categorized
Description of the plant:
Double Standardiris is from the double flowering range of Siberian iris. Double Standard produces very attractive deep indigo violet-blue flowers with pale golden yellow throat with conspicuous veins. Narrow leaves are pale green and taller than those on bearded iris. It is a midseason bloomer producing flowers from late May until the first decade of June.
Siberian iris thrives in full sun and should be planted in well-drained but constantly moist soil of any pH. Various sources say different things about pH requirements, however, truth is that if the soil is reasonably fertile acidity does not play a significant role. Do not mistake them for water irises which do like wet and boggy conditions, these hybrids might rot it such environment.
The plants spread with their rhizomes but are not invasive. Unwanted new rhizomes can easily be dug out and transplanted somewhere else. The rhizomes like warmth so if your garden beds are mulched reduce its amount above iris’ roots to minium. Occasional fertilizing is welcome to enhance flowering and plant health. Thanks to showy flowers and variability of colours available they will be both a perfect companion plants for others as well as great features in any landscape design. Fully hardy to min. -40°C (USDA zone 3).
Last update 24-06-2020
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