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Black Spots in Hydrangea
verifiedReviewed by the GreenScout Team
Hydrangeas produce spectacular large flower heads in pink, blue, purple, or white
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Hydrangea care requirements
These care conditions are most relevant to black spots in Hydrangea. Check each one as a potential cause.
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Humidity
Moderate to high.
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Water
Deeply and regularly. Dislikes drought. Mulch to retain moisture.
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Temperature
Hardy to about -15°C. Buds frost-sensitive.
symptoms
Symptoms to look for in Hydrangea
- fiber_manual_recordBlack or dark brown spots
- fiber_manual_recordSpots with yellow halos
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Common causes in Hydrangea
- fiber_manual_recordFungal disease (black spot)
- fiber_manual_recordBacterial infection
- fiber_manual_recordSunburn
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How to diagnose black spots in Hydrangea
Fungal spots: often circular with yellow margins. Sunburn: irregular bleached patches turning black.
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How to treat black spots in Hydrangea
Remove affected leaves. Apply fungicide. Adjust sun exposure.
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Preventing black spots in Hydrangea
Avoid wetting foliage. Provide adequate spacing. Remove debris.