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Leaf Spot in Mahonia

How to identify and treat leaf spot in Mahonia.

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Mahonia care requirements

water
Moderate watering during growing season. Reduce in winter. Once established, fairly drought-tolerant.
soil
Well-drained, slightly acidic soil preferred. Tolerates poor soils. Avoid heavy clay without amendment.
light
Partial shade to full shade. Tolerates deep shade; colors less vibrant in shade but still attractive.
symptoms

Symptoms to look for in Mahonia

  • fiber_manual_recordCircular brown or black spots
  • fiber_manual_recordYellow halos around spots
  • fiber_manual_recordPremature defoliation
help

Common causes in Mahonia

Multiple fungal and bacterial pathogens. Favoured by wet foliage and warm temperatures.

healing

How to treat leaf spot in Mahonia

Remove affected leaves. Apply appropriate fungicide or bactericide.

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Preventing leaf spot in Mahonia

Water at soil level. Improve air circulation. Practise crop rotation.

Leaf Spot in Mahonia — Symptoms & Treatment | GreenScout