Iris pseudacorus
Yellow fleur-de-lis, Water flag, Water skegs, Daggers, Flagon, Jacob's sword, Yellow flag, Yellow iris
Iris Iris
I. pseudacorus - I. pseudacorus is an extremely vigorous, rhizomatous, deciduous perennial forming an extensive clump of erect, sword-shaped, grey-green leaves and, in summer bright yellow flowers with brown or purple- veined falls.
Iris pseudacorus is: Deciduous
Clump-forming, Erect
Severe stomach discomfort may result if ingested.
Yellow in Summer
Green in Spring; Green in Summer; Green in Autumn
Sawflies Sawflies
Bacterial soft rot , Botryosphaeria fungus Bacterial soft rot , Botryosphaeria fungus
Remove faded flower stems to prevent any unwanted seedlings. Cut back when leaves start to yellow in autumn.
Division
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Iris pseudacorus (Yellow flag) will reach a height of 1.5m and a spread of 1.5m after 2-5 years.
Aquatic, Beds and borders, Bees (attract & feed bees), City, Coastal, Cottage/Informal, Low Maintenance, Waterside, Wildlife
Plant in autumn in full sun or partial shade in moist to wet, humus-rich, acid soil at pond or stream margins. Site carefully as may naturalize and form large colonies. Tolerates neutral soil. Do not allow to dry out.
Clay, Loamy
Moisture-retentive, Boggy damp conditions, Pond/In water
Acid
Partial Shade, Full Sun
South, East, West
Exposed, Sheltered
Hardy (H4)
Iris pseudacorus
Yellow fleur-de-lis, Water flag, Water skegs, Daggers, Flagon, Jacob's sword, Yellow flag, Yellow iris
Iris Iris
I. pseudacorus - I. pseudacorus is an extremely vigorous, rhizomatous, deciduous perennial forming an extensive clump of erect, sword-shaped, grey-green leaves and, in summer bright yellow flowers with brown or purple- veined falls.
Garden origin
Deciduous
Clump-forming, Erect
Severe stomach discomfort may result if ingested.
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Yellow in Summer
Green in Spring; Green in Summer; Green in Autumn
Bacterial soft rot , Botryosphaeria fungus
Remove faded flower stems to prevent any unwanted seedlings. Cut back when leaves start to yellow in autumn.
Division
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Iris pseudacorus (Yellow flag) will reach a height of 1.5m and a spread of 1.5m after 2-5 years.
Aquatic, Beds and borders, Bees (attract & feed bees), City, Coastal, Cottage/Informal, Low Maintenance, Waterside, Wildlife
Plant in autumn in full sun or partial shade in moist to wet, humus-rich, acid soil at pond or stream margins. Site carefully as may naturalize and form large colonies. Tolerates neutral soil. Do not allow to dry out.
Clay, Loamy
Moisture-retentive, Boggy damp conditions, Pond/In water
Acid
Partial Shade, Full Sun
South, East, West
Exposed, Sheltered
Hardy (H4)
Zone 8, Zone 7, Zone 6, Zone 5
Iris pseudacorus (Yellow flag)
Red rice root aphid; Rice root aphid
Rhopalosiphum rufiabdominalis
Insect
Absent
3
3
Potentially significant glasshouse pest; growers should monitor for its presence. Routine aphid control should be effective in mitigating risk.
Iris pseudacorus (Yellow flag)
common blossom thrips; cotton bud thrips; tomato thrips
Frankliniella schultzei
Insect
Absent
2
3
Polyphagous glasshouse pest; present in many countries; single finding in UK.
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: | Clay, Loamy | Tell us... |
Soil drainage: | Moisture-retentive, Boggy damp conditions, Pond/In water | Tell us... |
Soil pH: | Acid | Tell us... |
Light: | Partial Shade, Full Sun | Tell us... |
Aspect: | South, East, West | Tell us... |
Exposure: | Exposed, Sheltered | Tell us... |
Hardiness: | Hardy (H4) | Tell us... |
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cutting the leaves
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