Iris ensata 'Kumo-no-obi' (Japanese water iris 'Kumo-no-obi')

Botanical name

Iris ensata 'Kumo-no-obi'

Other names

Japanese water iris 'Kumo-no-obi', Japanese flag 'Kumo-no-obi', Japanese iris 'Kumo-no-obi'

Genus

Iris Iris

Variety or Cultivar

'Kumo-no-obi' _ 'Kumo-no-obi' is an erect, clump-forming, rhizomatous perennial with narrow, strap-like, mid- to bright green leaves and, in early to midsummer, dark purple flowers with prominent yellow markings.

Foliage

Deciduous

Habit

Clump-forming, Erect

Toxicity

Ingestion may cause severe discomfort.

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Colour

Flower

Dark-purple in Summer

Foliage

Mid-green in Spring; Mid-green in Summer

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How to care

Watch out for

Specific pests

Slugs , Snails

Diseases

Generally disease-free.

General care

Pruning

Cut back any dead or dying foliage in autumn. Remove spent flower stems.

Propagation methods

Division

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Monthly care advice

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Where to grow

Iris ensata 'Kumo-no-obi' (Japanese water iris 'Kumo-no-obi') will reach a height of 0.9m and a spread of 0.5m after 2-5 years.

Suggested uses

Cottage/Informal, Flower Arranging, Beds and borders, Waterside

Cultivation

Plant in moist to wet, deep, humus-rich, acid soil, preferably at the margins of ponds or streams.

Soil type

Clay, Loamy, Sandy

Soil drainage

Boggy damp conditions, Moisture-retentive

Soil pH

Acid

Light

Partial Shade, Full Shade

Aspect

South, East, West

Exposure

Exposed, Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Hardy (H4)

USDA zones

Zone 9, Zone 8, Zone 7, Zone 6, Zone 5, Zone 4

Defra's Risk register #1

Plant name

Iris ensata 'Kumo-no-obi' (Japanese water iris 'Kumo-no-obi')

Common pest name

Red rice root aphid; Rice root aphid

Scientific pest name

Rhopalosiphum rufiabdominalis

Type

Insect

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

3

Impact (1 is very low - 5 is very high)

3

General biosecurity comments

Potentially significant glasshouse pest; growers should monitor for its presence. Routine aphid control should be effective in mitigating risk.

Defra's Risk register #2

Plant name

Iris ensata 'Kumo-no-obi' (Japanese water iris 'Kumo-no-obi')

Common pest name

common blossom thrips; cotton bud thrips; tomato thrips

Scientific pest name

Frankliniella schultzei

Type

Insect

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

2

Impact (1 is very low - 5 is very high)

3

General biosecurity comments

Polyphagous glasshouse pest; present in many countries; single finding in UK.

About this section

Our plants are under greater threat than ever before. There is increasing movement of plants and other material traded from an increasing variety of sources. This increases the chances of exotic pests arriving with imported goods and travellers, as well as by natural means. Shoot is working with Defra to help members to do their part in preventing the introduction and spread of invasive risks.

Traveling or importing plants? Please read "Don't risk it" advice here

Suspected outbreak? Click here for contact details to report to the relevant authority.

Date updated: 7^th March 2019 For more information visit: https://planthealthportal.defra.gov.uk/