Cotswolds Garden - FAQs

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What is grey mould (Botrytis) on roses?

Grey mould (Botrytis cinerea) is a common fungal disease that causes fuzzy greyish-brown mould on buds, flowers, and sometimes leaves, leading to rot and collapse. It thrives in cool, damp, and humid conditions, often affecting damaged or senescing plant parts. Remove and destroy affected parts promptly. Improve air circulation, avoid overhead watering, and ensure good plant hygiene. Reduce overcrowding to minimise humidity around the plants.

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