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Beardless Iris Iris sibirica
These irises grow in any good moisture retentive soil which contains a reasonable amount of organic matter, in full sun or in partial shade. They are particularly good when planted at the edge of a stream or pond where their roots can dip into the water. Once planted iris sibirica are very undemanding and don't need regular division. Plant firmly but not too deeply.
Iris ensata (kaempferi)
The Japanese iris prefers a good rich soil containing plenty of organic matter and are particularly suited to acid soils. They need plenty of water and you can grow them very successfully as marginal plants beside a pond. Iris ensata are quite heavy feeders and should be fed in early spring. They are best divided every 3 - 4 years.
Iris unguicularis
This species flowers between October and March. For preference choose a well drained, sheltered spot against a south wall, in full sun. Iris unguicularis need little attention and can be left for many years without division.
Iris foetidissima
The Gladwin iris thrives in any soil including pure chalk, under trees and in shade. It's very undemanding but should be watered well after planting until it has become established.
Iris pseudacorus
This iris quickly colonizes marshy ground or shallow water. It can also be grown in an open border where the soil is not too dry.
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