Troubleshooting
Japanese morning glory problems — and how to fix them
Japanese morning glory (Ipomoea nil) 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.
Transplant shock and wilting
Morning glories have sensitive taproots and dislike transplanting. Always sow into individual biodegradable pots or cells and transplant pot-and-all to avoid root disturbance. Wilting at transplant is common; shade briefly and water in well.
Powdery mildew in late season
White powdery fungal coating on leaves, especially in late summer as nights cool. Improve air circulation, water at the base to keep foliage dry, and apply a sulphur-based or bicarbonate spray. Remove badly affected leaves promptly.
Leaf miners
Larvae of small flies tunnel through leaf tissue, creating pale serpentine trails. Damage is mainly cosmetic. Remove and destroy affected leaves; avoid broad-spectrum insecticides that kill parasitoid wasps that naturally control leaf miner populations.
Prevent japanese morning glory problems before they start
Most japanese morning glory issues are care-mismatch, not bad luck. Dial in the basics:
Looking for japanese morning glory in general rather than its problems? Read the full japanese morning glory care guide — light, water, soil and feeding.
Japanese morning glory problems — FAQ
Why is my japanese morning glory transplant shock and wilting?
Morning glories have sensitive taproots and dislike transplanting. Always sow into individual biodegradable pots or cells and transplant pot-and-all to avoid root disturbance. Wilting at transplant is common; shade briefly and water in well.
Why is my japanese morning glory powdery mildew in late season?
White powdery fungal coating on leaves, especially in late summer as nights cool. Improve air circulation, water at the base to keep foliage dry, and apply a sulphur-based or bicarbonate spray. Remove badly affected leaves promptly.
Why is my japanese morning glory leaf miners?
Larvae of small flies tunnel through leaf tissue, creating pale serpentine trails. Damage is mainly cosmetic. Remove and destroy affected leaves; avoid broad-spectrum insecticides that kill parasitoid wasps that naturally control leaf miner populations.