Troubleshooting
Meyer lemon problems — and how to fix them
Meyer lemon (Citrus limon 'Meyer') 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.
Leaf drop / flower drop indoors
Triggered by moving the tree, temperature fluctuations, low light, or inconsistent watering. Avoid repositioning a tree that is flowering or in fruit; keep away from radiators and cold draughts; maintain 6+ hours of direct light.
Scale insects and mealybugs
Very common on indoor Meyer lemon trees. Inspect the leaf axils, stem joints, and leaf undersides regularly. Control small infestations with rubbing alcohol and a cotton swab; larger ones with horticultural oil or insecticidal soap spray.
Sooty mould
Black fungal film on leaves is a secondary symptom of aphid or scale honeydew deposits. Eliminate the pest first, then wipe foliage clean with a damp cloth. Sooty mould blocks photosynthesis and weakens the tree if left unchecked.
Prevent meyer lemon problems before they start
Most meyer lemon issues are care-mismatch, not bad luck. Dial in the basics:
Looking for meyer lemon in general rather than its problems? Read the full meyer lemon care guide — light, water, soil and feeding.
Meyer lemon problems — FAQ
Why is my meyer lemon leaf drop / flower drop indoors?
Triggered by moving the tree, temperature fluctuations, low light, or inconsistent watering. Avoid repositioning a tree that is flowering or in fruit; keep away from radiators and cold draughts; maintain 6+ hours of direct light.
Why is my meyer lemon scale insects and mealybugs?
Very common on indoor Meyer lemon trees. Inspect the leaf axils, stem joints, and leaf undersides regularly. Control small infestations with rubbing alcohol and a cotton swab; larger ones with horticultural oil or insecticidal soap spray.
Why is my meyer lemon sooty mould?
Black fungal film on leaves is a secondary symptom of aphid or scale honeydew deposits. Eliminate the pest first, then wipe foliage clean with a damp cloth. Sooty mould blocks photosynthesis and weakens the tree if left unchecked.