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Rust in Iris Sibirica
How to identify and treat rust in Iris Sibirica.
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Iris Sibirica care requirements
water
Consistently moist to wet soil; more moisture-tolerant than bearded irises. Water regularly during growing season; can tolerate boggy conditions
soil
Humus-rich, fertile soil with consistent moisture; tolerates slightly acidic to neutral pH. Good drainage still important to prevent root rot
light
Full sun to partial shade; at least 4–6 hours of direct sunlight for optimal flowering
symptoms
Symptoms to look for in Iris Sibirica
- fiber_manual_recordOrange or brown pustules on leaf undersides
- fiber_manual_recordYellow spots on leaf tops
- fiber_manual_recordPremature leaf drop
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Common causes in Iris Sibirica
Caused by various Puccinia and Phragmidium species. Spreads via windborne spores in moist conditions.
healing
How to treat rust in Iris Sibirica
Remove and destroy infected leaves. Apply copper or sulphur fungicide.
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Preventing rust in Iris Sibirica
Avoid overhead watering. Space plants adequately. Clear debris.