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Brown Spots in Mahonia
verifiedReviewed by the GreenScout Team
Mahonia aquifolium, or Oregon Grape, is an evergreen shrub featuring pinnate, holly-like glossy foliage that turns bronze-purple in cool weather
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Mahonia care requirements
These care conditions are most relevant to brown spots in Mahonia. Check each one as a potential cause.
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Light
Partial shade to full shade. Tolerates deep shade; colors less vibrant in shade but still attractive.
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Water
Moderate watering during growing season. Reduce in winter. Once established, fairly drought-tolerant.
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Humidity
Moderate humidity. Performs well in woodland conditions.
symptoms
Symptoms to look for in Mahonia
- fiber_manual_recordBrown patches on leaves
- fiber_manual_recordCrispy brown areas
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Common causes in Mahonia
- fiber_manual_recordFungal leaf spot
- fiber_manual_recordSunburn
- fiber_manual_recordBacterial blight
- fiber_manual_recordCold damage
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How to diagnose brown spots in Mahonia
Sunburn: bleached patches facing light source. Fungal: brown spots with rings. Bacterial: water-soaked spots turning brown.
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How to treat brown spots in Mahonia
Remove affected leaves. Treat with appropriate fungicide or bactericide. Adjust light exposure.
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Preventing brown spots in Mahonia
Avoid direct midday sun. Improve air circulation. Water at soil level.