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IRIS unguicularis
Commonly known as Algerian iris
(syn. stylosa) - clear blue winter flowering iris
Plant Details
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Floweringlocal_floristJanlocal_floristFeblocal_floristMarlocal_floristAprlocal_floristMaylocal_floristJunlocal_floristJullocal_floristAuglocal_floristSeplocal_floristOctlocal_floristNovlocal_floristDec
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Good to knowDoes not need feeding or soil improvement. The older and more congested the clump becomes the better it flowers.
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Pests & DiseasesSlugs, snails.
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Place of originGreece, western and southern Turkey, western Syria, Tunisia, Algeria.
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EvergreenTough, grasslike leaves to 60cm (24in) long.
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BlueClear blue
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Fully hardy
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Height30cm (12in)
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Spread10-50cm (4-20in)
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Bulb/Corm or rhizomatous perennialVigorous, rhizomatous, beardless perennial. Large flowers 5-8cm (2-3in) across are produced on very short stems
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HerbaceousEarly in the year, typically January till end of March, herbaceous plants might be supplied in 9cm pots to ensure timely despatch.
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Hardy - cold winterHardy in most places throughout the UK even in severe winters. May not withstand open/exposed sites or central/northern locations. Plant can withstand temperatures down to -15°C (5°F)
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Scented flowers
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Spring Seasonal Interest
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Winter Seasonal Interest
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harmful if eatenPeople and pets, i.e. cats, dogs, rabbits, rodents
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skin irritantPeople
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Rabbit Resistant
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Mature Size30cm (12in)
10-50cm (4-20in)
Planting Tips and Care Advice
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Garden Location/Conditions
Cottage gardenRockery (inc alpine)Town garden
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Soil Conditions
Neutral to alkaline soilWell drained, dry, poor to moderately fertile soilThrives in a dry, stony soil.
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Sun Requirements
Against a wallFull sun
Herbaceous Plants - Video Collection
- Dividing Herbaceous Perennials - Video Tip ondemand_video
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Iris - Growing Guide