Troubleshooting
Humboldt's Caladium problems — and how to fix them
Humboldt's Caladium (Caladium humboldtii) 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.
Sudden leaf collapse (dormancy)
Normal seasonal behaviour, not a disease. Reduce watering, allow foliage to die back naturally, and store the tuber in barely moist medium at 18-20°C until spring.
Root rot
Tubers are susceptible to rot in cold, wet soil. Ensure warm temperatures (above 20°C) and good drainage at all times.
Crispy leaf edges
Caused by low humidity or hot, dry draughts. Boost humidity and move away from heating vents.
Faded variegation
Too much direct sun bleaches the leaves. Move to bright but indirect light for the best contrast.
Fungus gnats
Attracted by moist soil. Allow the topsoil to dry slightly between waterings and apply a layer of sand on the surface.
Prevent humboldt's caladium problems before they start
Most humboldt's caladium issues are care-mismatch, not bad luck. Dial in the basics:
Humboldt's Caladium problems — FAQ
Why is my humboldt's caladium sudden leaf collapse (dormancy)?
Normal seasonal behaviour, not a disease. Reduce watering, allow foliage to die back naturally, and store the tuber in barely moist medium at 18-20°C until spring.
Why is my humboldt's caladium root rot?
Tubers are susceptible to rot in cold, wet soil. Ensure warm temperatures (above 20°C) and good drainage at all times.
Why is my humboldt's caladium crispy leaf edges?
Caused by low humidity or hot, dry draughts. Boost humidity and move away from heating vents.
Why is my humboldt's caladium faded variegation?
Too much direct sun bleaches the leaves. Move to bright but indirect light for the best contrast.
Why is my humboldt's caladium fungus gnats?
Attracted by moist soil. Allow the topsoil to dry slightly between waterings and apply a layer of sand on the surface.