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Botrytis Blight in Panicle Hydrangea

How to identify and treat botrytis blight in Panicle Hydrangea.

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Panicle Hydrangea care requirements

water
Water regularly during the first growing season to establish deep roots; mature plants are drought-tolerant but prefer consistent moisture.
soil
Tolerant of various soil types; prefers fertile, well-draining soil with pH 5.5–7.0.
light
Full sun to partial shade; flowers best with at least 6 hours of direct sun daily.
symptoms

Symptoms to look for in Panicle Hydrangea

  • fiber_manual_recordFuzzy grey-brown mould on flowers, leaves, or stems
  • fiber_manual_recordWater-soaked spots that turn brown and mushy
  • fiber_manual_recordBlighted flower buds that fail to open
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Common causes in Panicle Hydrangea

Caused by the fungus Botrytis cinerea (grey mould), which thrives in cool, humid conditions with poor air circulation, often spreading rapidly on damaged or ageing plant tissue.

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How to treat botrytis blight in Panicle Hydrangea

Remove and destroy all affected plant material immediately, improve airflow around the plant, and apply a fungicide labelled for Botrytis if the infection is spreading.

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Preventing botrytis blight in Panicle Hydrangea

Avoid overhead watering and overcrowding, water at soil level, deadhead spent flowers promptly, and ensure good ventilation, especially in humid weather.

Botrytis Blight in Panicle Hydrangea — Symptoms & Treatment | GreenScout