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Iris unguicularis (Algerian iris)

Beginner
skill rating
1 hour care
per year
0.2m
Max height
0.6m
Max spread
2-5 years
To maturity
Low
Toxicity

Plant details

Botanical name

Iris unguicularis

Other names

Algerian iris, Iris stylosa, Algerian winter iris, Winter iris

Genus

Iris Iris

Species

I. unguicularis - I. unguicularis is a vigorous, clump-forming, rhizomatous, evergreen perennial with upright, dark grey-green leaves and, in late winter and early spring, fragrant, veined, lavender to violet flowers with yellow-marked falls.


Iris unguicularis is: Evergreen

Fragrance

Flowers have soft fragrance.

Habit

Compact, Erect

Toxicity

Ingestion may cause severe discomfort.

Flower

Violet, Lavender in Spring; Lavender, Violet in Winter

Foliage

Dark-green in All seasons

How to care

Watch out for

Specific pests

Slugs , Snails Slugs , Snails

Diseases

Generally disease-free.

General care

Pruning

Cut back after flowering.

Propagation methods

Division


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Where to grow

Iris unguicularis (Algerian iris) will reach a height of 0.2m and a spread of 0.6m after 2-5 years.

Suggested uses

Cottage/Informal, Flower Arranging, Beds and borders, Wallside and trellises, Coastal, City

Cultivation

Plant in well-drained, neutral to slightly alkaline soil in full sun. Best planted at the base of a sunny wall. Occasionally blooms again in autumn.

Soil type

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

Soil drainage

Well-drained

Soil pH

Alkaline, Neutral

Light

Full Sun

Aspect

South, East, West

Exposure

Exposed, Sheltered

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

Hardy (H4)

Companion plants

We do not currently have companion plants added for this plant.

Botanical name

Iris unguicularis

Other names

Algerian iris, Iris stylosa, Algerian winter iris, Winter iris

Genus

Iris Iris

Species

I. unguicularis - I. unguicularis is a vigorous, clump-forming, rhizomatous, evergreen perennial with upright, dark grey-green leaves and, in late winter and early spring, fragrant, veined, lavender to violet flowers with yellow-marked falls.

Native to

Western Asia, Northern Africa

Foliage

Evergreen

Fragrance

Flowers have soft fragrance.

Habit

Compact, Erect

Toxicity

Ingestion may cause severe discomfort.


Colour

Flower

Violet, Lavender in Spring; Lavender, Violet in Winter

Foliage

Dark-green in All seasons


How to care

Watch out for

Specific pests

Slugs , Snails

Diseases

Generally disease-free.

General care

Pruning

Cut back after flowering.

Propagation methods

Division


Monthly care advice


Where to grow

Iris unguicularis (Algerian iris) will reach a height of 0.2m and a spread of 0.6m after 2-5 years.

Suggested uses

Cottage/Informal, Flower Arranging, Beds and borders, Wallside and trellises, Coastal, City

Cultivation

Plant in well-drained, neutral to slightly alkaline soil in full sun. Best planted at the base of a sunny wall. Occasionally blooms again in autumn.

Soil type

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

Soil drainage

Well-drained

Soil pH

Alkaline, Neutral

Light

Full Sun

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

Defra's Risk register #1

Plant name

Iris unguicularis (Algerian 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 unguicularis (Algerian 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: 7th March 2019 For more information visit: https://planthealthportal.defra.gov.uk/

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This plant likes... Garden match
Soil types: Chalky, Clay, Loamy, Sandy (will tolerate most soil types) Tell us...
Soil drainage: Well-drained Tell us...
Soil pH: Alkaline, Neutral Tell us...
Light: Full Sun Tell us...
Aspect: South, East, West Tell us...
Exposure: Exposed, Sheltered Tell us...
Hardiness: Hardy (H4) Tell us...

GARDENS WITH THIS PLANT

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My Garden
Robert Kay
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ANNMARIE & ANDREW

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