Troubleshooting
Colocasia 'Illustris' (Imperial Taro) problems — and how to fix them
Colocasia 'Illustris' (Imperial Taro) (Colocasia esculenta 'Illustris') 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.
Yellowing leaves and mushy stems
Usually overwatering or cold, especially when the plant is slowing for dormancy. Cut back on water in autumn/winter and check the corm and roots for rot.
Root and corm rot
Caused by stagnant, airless waterlogging or cold wet conditions. Look for blackened, mushy, foul-smelling roots; improve drainage indoors and ease off watering when growth stalls.
Crispy, dry leaf edges
A sign of underwatering or low humidity. This is a bog plant, so keep soil reliably moist in growth and raise ambient humidity.
Red spider mite
Encouraged by hot, dry indoor air; shows as fine webbing and a pale stippled mosaic on leaves. Raise humidity and treat with insecticidal soap or neem oil.
Small, pale, weak leaves
Insufficient light or under-feeding. Move to a brighter spot and feed regularly through the growing season, as this is a hungry plant.
Sudden leaf die-back in autumn/winter
Often normal seasonal dormancy rather than a problem; the plant may drop foliage below about 21C. Reduce water and let the corm rest, and it will reshoot in spring.
Prevent colocasia 'illustris' (imperial taro) problems before they start
Most colocasia 'illustris' (imperial taro) issues are care-mismatch, not bad luck. Dial in the basics:
- Common elephant ear problems — the species this cultivar belongs to
- PictureThis alternatives — 7 plant ID apps compared
- Colocasia 'Illustris' (Imperial Taro) watering schedule
- Colocasia 'Illustris' (Imperial Taro) light requirements
- Best soil mix for colocasia 'illustris' (imperial taro)
- Colocasia 'Illustris' (Imperial Taro) temperature & humidity
- Full colocasia 'illustris' (imperial taro) care guide
Colocasia 'Illustris' (Imperial Taro) problems — FAQ
Why is my colocasia 'illustris' (imperial taro) yellowing leaves and mushy stems?
Usually overwatering or cold, especially when the plant is slowing for dormancy. Cut back on water in autumn/winter and check the corm and roots for rot.
Why is my colocasia 'illustris' (imperial taro) root and corm rot?
Caused by stagnant, airless waterlogging or cold wet conditions. Look for blackened, mushy, foul-smelling roots; improve drainage indoors and ease off watering when growth stalls.
Why is my colocasia 'illustris' (imperial taro) crispy, dry leaf edges?
A sign of underwatering or low humidity. This is a bog plant, so keep soil reliably moist in growth and raise ambient humidity.
Why is my colocasia 'illustris' (imperial taro) red spider mite?
Encouraged by hot, dry indoor air; shows as fine webbing and a pale stippled mosaic on leaves. Raise humidity and treat with insecticidal soap or neem oil.
Why is my colocasia 'illustris' (imperial taro) small, pale, weak leaves?
Insufficient light or under-feeding. Move to a brighter spot and feed regularly through the growing season, as this is a hungry plant.
Why is my colocasia 'illustris' (imperial taro) sudden leaf die-back in autumn/winter?
Often normal seasonal dormancy rather than a problem; the plant may drop foliage below about 21C. Reduce water and let the corm rest, and it will reshoot in spring.