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Leaf Spot in Swiss Chard

How to identify and treat leaf spot in Swiss Chard.

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Swiss Chard care requirements

water
Keep soil consistently moist, providing 1–1.5 inches of water per week. Water deeply at the base to encourage strong root development. Reduce frequency slightly in cool seasons but never allow soil to dry completely.
soil
Rich, well-draining soil with pH 6.0–7.5. Incorporate 2–3 inches of compost or aged manure before planting. Swiss chard appreciates fertile soil but adapts to moderate fertility.
light
Full sun preferred; 6–8 hours of direct sunlight daily. Tolerates partial shade but produces fewer, slower-growing leaves. Some afternoon shade in hot climates reduces bolting.
symptoms

Symptoms to look for in Swiss Chard

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

Common causes in Swiss Chard

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

healing

How to treat leaf spot in Swiss Chard

Remove affected leaves. Apply appropriate fungicide or bactericide.

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Preventing leaf spot in Swiss Chard

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