LetBug LetBug
Published on February 13, 2026

Yellow Leaves: A Step-by-Step Troubleshooting Workflow

Why is your plant turning yellow? Use this logic tree to diagnose the problem.

Key Takeaways

  • Check soil moisture before watering.
  • Look for signs of stress early.
  • Consistency is key for recovery.

Yellow leaves (Chlorosis) are the plant’s way of screaming for help. But what is it saying?

1. Check the Moisture (Most Common)

  • Soil is soggy? Overwatering. The roots are drowning.
  • Soil is bone dry? Underwatering. The plant is sacrificing older leaves to save water.

2. Check the Pattern

  • Yellowing veins (green leaf)? Nutrient deficiency (likely Iron or Magnesium).
  • Yellow spots? Pest damage or fungal infection.
  • Oldest (bottom) leaves only? Natural aging. Pluck them off.

3. Check the Roots

If the soil is wet but the plant looks thirsty, you likely have Root Rot. Smell the soil. Does it smell like a swamp? If yes, repot immediately.

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