Troubleshooting
Persian lime problems — and how to fix them
Persian lime (Citrus latifolia) 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.
Dropped fruit before maturity
Small fruit drop in late spring is normal (June drop equivalent). Excessive fruit drop indicates water stress, low light, or nutrient deficiency. Ensure consistent irrigation and adequate potassium during fruit set.
Collar rot (Phytophthora)
Dark, weeping cankers at the graft union or soil line indicate Phytophthora infection from waterlogged soil. Improve drainage, keep the graft union above soil level, and avoid mulching against the trunk.
Citrus whitefly
Tiny white flies and honeydew on leaf undersides. Yellow sticky traps for monitoring; treat outbreaks with insecticidal soap or a systemic insecticide labelled for citrus.
Prevent persian lime problems before they start
Most persian lime issues are care-mismatch, not bad luck. Dial in the basics:
Looking for persian lime in general rather than its problems? Read the full persian lime care guide — light, water, soil and feeding.
Persian lime problems — FAQ
Why is my persian lime dropped fruit before maturity?
Small fruit drop in late spring is normal (June drop equivalent). Excessive fruit drop indicates water stress, low light, or nutrient deficiency. Ensure consistent irrigation and adequate potassium during fruit set.
Why is my persian lime collar rot (phytophthora)?
Dark, weeping cankers at the graft union or soil line indicate Phytophthora infection from waterlogged soil. Improve drainage, keep the graft union above soil level, and avoid mulching against the trunk.
Why is my persian lime citrus whitefly?
Tiny white flies and honeydew on leaf undersides. Yellow sticky traps for monitoring; treat outbreaks with insecticidal soap or a systemic insecticide labelled for citrus.