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Leaf Spot in Bigleaf Hydrangea
How to identify and treat leaf spot in Bigleaf Hydrangea.
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Bigleaf Hydrangea care requirements
water
Water deeply and consistently during the growing season; keep soil evenly moist but not soggy. Reduce watering in winter.
soil
Prefers rich, well-draining, slightly acidic soil (pH 5.0–6.5); acidic soil produces blue flowers, neutral to alkaline produces pink.
light
Partial shade is best; morning sun and afternoon shade prevent wilting and fading of flowers. Avoid intense afternoon sun in hot climates.
symptoms
Symptoms to look for in Bigleaf Hydrangea
- fiber_manual_recordCircular brown or black spots
- fiber_manual_recordYellow halos around spots
- fiber_manual_recordPremature defoliation
help
Common causes in Bigleaf Hydrangea
Multiple fungal and bacterial pathogens. Favoured by wet foliage and warm temperatures.
healing
How to treat leaf spot in Bigleaf Hydrangea
Remove affected leaves. Apply appropriate fungicide or bactericide.
shield
Preventing leaf spot in Bigleaf Hydrangea
Water at soil level. Improve air circulation. Practise crop rotation.