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Black Spot in Delphiniums
How to identify and treat black spot in Delphiniums.
potted_plant
Delphiniums care requirements
water
Keep soil consistently moist but not waterlogged; excellent drainage essential. Water at base to prevent foliar diseases.
soil
Rich, well-draining soil amended with compost or leaf mold. Prefers slightly alkaline to neutral pH (6.5–7.5).
light
Full sun (6–8 hours daily) for optimal flowering; afternoon shade beneficial in hot climates.
symptoms
Symptoms to look for in Delphiniums
- fiber_manual_recordCircular black spots on rose leaves
- fiber_manual_recordYellow leaf halos
- fiber_manual_recordPremature defoliation
help
Common causes in Delphiniums
Caused by Diplocarpon rosae. Spreads in wet conditions.
healing
How to treat black spot in Delphiniums
Remove infected leaves. Apply rose fungicide. Repeat weekly in wet weather.
shield
Preventing black spot in Delphiniums
Choose resistant rose varieties. Water at base. Good air circulation.