Troubleshooting
Nam Doc Mai Mango problems — and how to fix them
Nam Doc Mai Mango (Mangifera indica 'Nam Doc Mai') is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Anthracnose
Fungal disease causing black spots on leaves, flowers and fruit, worst in wet, humid conditions. Improve airflow, avoid wetting foliage, and remove infected material.
Root rot from overwatering
The commonest killer in pots. Use a gritty, free-draining mix and let the surface dry between waterings; never leave the pot standing in a saucer of water.
Failure to flower or fruit
Caused by too little light, excess nitrogen, or lack of a cool, dry rest. Maximise sun, ease off feeding, and allow a drier winter period to trigger flowering.
Cold damage
Foliage is damaged below about 4°C and the tree is killed by frost. Protect or bring under cover before temperatures drop in autumn.
Prevent nam doc mai mango problems before they start
Most nam doc mai mango issues are care-mismatch, not bad luck. Dial in the basics:
Looking for nam doc mai mango in general rather than its problems? Read the full nam doc mai mango care guide — light, water, soil and feeding.
Nam Doc Mai Mango problems — FAQ
Why is my nam doc mai mango anthracnose?
Fungal disease causing black spots on leaves, flowers and fruit, worst in wet, humid conditions. Improve airflow, avoid wetting foliage, and remove infected material.
Why is my nam doc mai mango root rot from overwatering?
The commonest killer in pots. Use a gritty, free-draining mix and let the surface dry between waterings; never leave the pot standing in a saucer of water.
Why is my nam doc mai mango failure to flower or fruit?
Caused by too little light, excess nitrogen, or lack of a cool, dry rest. Maximise sun, ease off feeding, and allow a drier winter period to trigger flowering.
Why is my nam doc mai mango cold damage?
Foliage is damaged below about 4°C and the tree is killed by frost. Protect or bring under cover before temperatures drop in autumn.