yellow spots

Yellow spots on plant leaves are a common problem and can have many different causes. They are a visible sign that the plant is under stress or has health problems. This article explores the most common reasons for yellow spots, how to prevent them, and what measures can help if your plant is affected.

Possible causes of yellow spots

1. Water problems

   • Overwatering: Waterlogging leads to a lack of oxygen in the roots, causing leaves to develop yellow spots or edges.
   • Dryness: Too little water causes desiccation stress, which can trigger yellow spots.

2. Nutrient deficiency

   • Nitrogen deficiency: Leaves yellow uniformly or show yellow spots, while the leaf veins often remain green.
   • Iron deficiency: Young leaves develop yellow spaces between the leaves, while the veins remain green (chlorosis).
   • Potassium or magnesium deficiency: Yellow spots first appear on older leaves.

3. pests

   • Spider mites, thrips or aphids suck the plant sap, which can lead to yellow spots or localized discoloration.

4. Diseases

   • Fungal infestation: Leaf spot disease or powdery mildew often lead to yellow spots that spread.
   • Bacterial infections: These often manifest as yellow, water-soaked spots.

5. sunburn

   • Direct sunlight can damage sensitive plants, which manifests itself in yellow, burned spots.

6. Unfavorable environmental conditions

   • Drafts or temperature fluctuations: Stress from sudden temperature changes can cause yellow spots.
   • Low humidity: Dry air can damage leaf tissue, especially in tropical plants.

Prevention of yellow spots

• Proper watering:
  Water your plant regularly, but avoid waterlogging. Allow the top layer of soil to dry out slightly before watering again.

• Ensure nutrient supply:
  Depending on the type and growth phase of your plants, fertilize them with a suitable fertilizer to prevent deficiencies.

• Adjust location:
  Ensure sufficient but indirect light and protect sensitive plants from direct sunlight.

• Pest control:
  Check your plants regularly for pests and remove them early.

• Increase humidity:
  Tropical plants benefit from regular misting or the use of a humidifier.

Measures to take in case of yellow spots

1. Check water balance:
   Check the soil: Is it too dry or too wet? Adjust watering accordingly.

2. Fertilize:
   If a nutrient deficiency is suspected, apply a balanced fertilizer.

3. Pest control:
   In case of infestation, biological agents such as neem oil or mild pest sprays can help.

4. Treating diseases:
   Cut off affected leaves and treat the plant with a suitable fungicide or antibacterial agent.

5. Change location:
   If sunburn is the cause, place the plant in a bright but shaded location.

When is swift action necessary?

If yellow spots spread rapidly, affect multiple leaves, or the entire plant shows signs of stress (e.g., drooping leaves, stunted growth), you should act immediately. This could indicate serious problems such as root rot or a progressive disease.