Lemon Tree Yellow Leaves on indoor citrus
What's Happening
Lemon tree leaves yellow from diverse causes including nitrogen deficiency (uniform yellowing), overwatering (yellowing with leaf drop), underwatering (yellowing with wilting), poor drainage (yellowing with root rot), nutrient lockout (interveinal yellowing), and natural senescence of older leaves. Container-grown specimens show symptoms faster due to environmental stress concentration. Differentiating the cause requires examining pattern, accompanying symptoms, and growing conditions.
How to Fix It
- 1
Check watering: Insert finger 2 inches deep—water only when dry; yellowing with wet soil indicates overwatering
- 2
Assess drainage: Ensure pot has multiple holes; if water stands in saucer for >30 minutes, improve drainage
- 3
Nitrogen supplement: For uniform yellowing, apply high-nitrogen fertilizer (blood meal or fish emulsion)
- 4
Nutrient adjustment: For interveinal yellowing, use citrus-specific micronutrient supplement containing iron and zinc
- 5
Root inspection: If yellowing progresses rapidly, unpot and inspect for root rot—healthy roots are white/firm
How to Prevent It
Water on schedule based on soil dryness not leaf appearance; use citrus-specific potting mix; fertilize regularly during growing season; maintain 50%+ humidity to reduce stress.