Iris foetidissima var. citrina (Yellow stinking iris )

Botanical name

Iris foetidissima var. citrina

Other names

Yellow stinking iris , Iris foetidissima chinensis, Yellow stinking gladwin, Iris foetidissima 'Citrina'

Genus

Iris Iris

Species

I. foetidissima var. citrina - I. foetidissima var. citrina is a vigorous, evergreen perennial with tufts of stiff, tough, erect, glossy, dark green leaves, unpleasantly scented when crushed, and small, pale yellow flowers followed by large seed capsules splitting to reveal bright orange-red fruit.

Foliage

Evergreen

Habit

Clump-forming, Erect

Toxicity

Ingestion may cause severe discomfort.

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Colour

Flower

Pale-yellow in Summer

Foliage

Dark-green in All seasons

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How to care

Watch out for

Specific pests

Slugs , Snails , Thrips

Specific diseases

Grey mould , Iris rhizome rot

General care

Pruning

Remove any dying foliage in autumn. Spent flower stems can be cut down after flowering. If desired, trim leaf fans to one third of overall height to reduce wind damage while plants are becoming established.

Propagation

Best to sow seed in a cold frame in autumn or spring.

Propagation methods

Division, Seed

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Monthly care advice

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Where to grow

Iris foetidissima var. citrina (Yellow stinking iris ) 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, Wallside and trellises, Roof terrace, City

Cultivation

Plant in in well-drained, fertile soil. Prefers neutral to slightly acid loam but tolerates a wide range of soil conditions.

Soil type

Chalky, Clay, Loamy, Sandy (will tolerate most soil types)

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade, Full Shade, Full Sun

Aspect

North, 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

Defra's Risk register #1

Plant name

Iris foetidissima var. citrina (Yellow stinking iris )

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 foetidissima var. citrina (Yellow stinking iris )

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/