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Iris laevigata, also named, the Japanese Water Iris and
Kakitsubata, is native to Japan, Korea and China, and is
growing in swampy places. It is a water-loving evergreen
Iris is growing to 30 inches high.
The flowers are consisting of 3 sepals and 3 petals.
Flowers are a rich blue, always erect; falls with a white
midstripe. Unbranched stems bear 2 to 4 flowers. Best
planted well before Spring to ensure it flowers,
Laevigata likes to have a well formed set of roots
developed before showing of the spectacular, but brief
flowers for a week or two late in the Spring.
The leaves are broad and green. The plant spreads by
means of its modified stems, rhizomes, which are located
below the soil surface.
Hardiness zones 4-9, (-32°C/-25°F, -5°C/25°F) in
Winter. This is a true aquatic Iris, requiring a wet site
the entire year. Iris laevigata is used frequently in
ponds, because it is one of the few Irises which will
grow reliably in shallow water. It can also be grown in
damp soil. Grow in moist to wet, deep, humus rich, acid
soil. This Iris requires sun to partial shade, growing
and flowering best in full.
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