What causes yellowing papaya leaves?
Written by
Liu Xiaohui
Reviewed by
Prof. Martin Thorne, Ph.D.Papaya leaves turning yellow during my inaugural growing season, was alarming until I determined it was due to overwatered soil. The lower leaf turned buttery yellow and was also soggy. After cutting back and watering twice a week for 10 days the leaves returned to a vibrant green. I now check soil moisture with a meter religiously.
Water Imbalance
- Overwatering: Leaves drop, stems soften → Let soil dry 2 inches deep
- Underwatering: Crispy edges → Soak soil until water drains freely
- Use terracotta pots for natural moisture control
Nutrient Deficiencies
- Nitrogen shortage: Uniform yellowing → Apply fish emulsion (5-1-1)
- Iron chlorosis: Veins stay green → Chelated iron spray
- Test soil pH monthly - papayas prefer 5.5-6.8
Environmental Stress
- Cold damage: Black spots → Wrap trunks with frost cloth
- Sunscald: Bleached patches → Install 30% shade cloth
- Use windbreaks for plants under 3 feet
With natural ageing, you will see the lower leaves yellow while the top continues to be green. You can remove these old leaves to encourage new growth and re-direct energy. My process of pruning your foliage after your plant has flowered: Sterilize shears with vodka, cut previously healthy leaves at an angle of 45°, and finally seal larger cuts with cinnamon powder to avoid infections.
Winter Protection
- Mulch 6-inch depth around base
- Wrap young trees with bubble insulation
- Reduce watering to monthly
Summer Management
- Install shade cloth during heatwaves
- Water at dawn to prevent evaporation
- Apply calcium to prevent fruit drop
Soil analysis indicated that my papayas were deficient in zinc due to persistent interveinal chlorosis/yellowing. I applied 1 tablespoon of zinc sulfate per gallon every 2 weeks; it took a few months but the zinc ultimately resolved the chronic interveinal yellowing. I now perform a soil test every three months - even my healthy trees are pushing leaves the size of dinner plates within just a few months.
Read the full article: How to Grow Papaya: 8 Essential Steps for Success
