Genus: Iris

Iris

Photo/Illustration: 
Jim Morros
(Iris)
EYE-riss
Iridaceae
Iris is a large genus of some 300 species from the Northern hemisphere. Irises are mostly rhizomatous or bulbous perennials grown for their flowers, which can be bearded, beardless, or crested. Some species also have variegated foliage. They are one of the best known and best loved garden plants.
Noteworthy characteristics:  Beautiful blooms in many color combinations and forms. Excellent in many situations, including borders, beds, wet areas, and rock gardens.
Care:  Each iris group has specific cultural requirements. See individual species accounts for information.
Propagation: 

Sow seed in containers in a cold frame in autumn. Lift and divide clumps, or separate bulb offsets, and plant bearded irises within a few weeks in mid-summer. Plant beardless irises immediately after dividing in early autumn.

Species, varieties and clutivars for genus Iris

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Tall Bearded Iris
Iris Germanica
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Pacific Coast Iris
Iris 'Pacific Coast Hybrid'
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Tall bearded iris
Iris 'Rip City'
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Iris brevicaulis
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Crested iris
Iris cristata
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Japanese iris
Iris ensata
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Louisiana iris
Iris fulva
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Rocky Mountain iris
Iris missouriensis
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Iris pallida 'Variegata'
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Yellow flag
Iris pseudacorus and cvs.
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Siberian iris
Iris sibirica
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Iris spuria
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Southern blue flag
Iris virginica
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Arilbred Iris
Iris Germanica
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Border Bearded Iris
Iris Germanica
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Siberian Iris
Iris Siberica
Problems: 

Iris borer, verbena bud moth, whiteflies, iris weevil, thrips, slugs, snails, aphids, and nematodes can cause problems. Bacterial leaf blight and soft rot, crown rot, rhizome rot, leaf spot, rust, viruses, and scorch can occur.