Troubleshooting
Navel orange problems — and how to fix them
Navel orange (Citrus sinensis 'Navel') 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.
Navel end splitting / creasing
Fruit split at the navel end results from irregular watering or temperature fluctuations during fruit development. Maintain even soil moisture and protect from sudden cold snaps while fruit is swelling.
Scale insects
California red scale and brown soft scale are common on both indoor and outdoor trees. Horticultural oil sprays applied in spring (crawler stage) are effective; avoid spraying in temperatures above 32°C to prevent phytotoxicity.
Leaf curl and spider mites
Low humidity and dry air encourage two-spotted spider mites, causing stippled, curling leaves. Increase humidity, wash foliage with water, and treat with neem oil or insecticidal soap if infestation is confirmed.
Prevent navel orange problems before they start
Most navel orange issues are care-mismatch, not bad luck. Dial in the basics:
Looking for navel orange in general rather than its problems? Read the full navel orange care guide — light, water, soil and feeding.
Navel orange problems — FAQ
Why is my navel orange navel end splitting / creasing?
Fruit split at the navel end results from irregular watering or temperature fluctuations during fruit development. Maintain even soil moisture and protect from sudden cold snaps while fruit is swelling.
Why is my navel orange scale insects?
California red scale and brown soft scale are common on both indoor and outdoor trees. Horticultural oil sprays applied in spring (crawler stage) are effective; avoid spraying in temperatures above 32°C to prevent phytotoxicity.
Why is my navel orange leaf curl and spider mites?
Low humidity and dry air encourage two-spotted spider mites, causing stippled, curling leaves. Increase humidity, wash foliage with water, and treat with neem oil or insecticidal soap if infestation is confirmed.