Troubleshooting
Spiked Kohleria problems — and how to fix them
Spiked Kohleria (Kohleria spicata) 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.
Spider mites
Warm, dry indoor conditions favour spider mite outbreaks on the undersides of hairy leaves, causing yellow stippling. Raise humidity, ensure regular inspection, and treat with neem oil or an appropriate miticide at the first sign of infestation.
Rhizome rot in wet winter conditions
If the plant is kept too wet when temperatures drop and growth slows, rhizomes rot rapidly. Taper off watering from late autumn, keeping compost barely moist, and resume normal watering only when new growth emerges in spring.
No flower spikes in low light
Insufficient light is the most common reason for failure to produce the characteristic flower spikes. Increase light levels significantly — ideally moving to a brighter window or adding full-spectrum grow-lights at 12–14 hours per day.
Prevent spiked kohleria problems before they start
Most spiked kohleria issues are care-mismatch, not bad luck. Dial in the basics:
Spiked Kohleria problems — FAQ
Why is my spiked kohleria spider mites?
Warm, dry indoor conditions favour spider mite outbreaks on the undersides of hairy leaves, causing yellow stippling. Raise humidity, ensure regular inspection, and treat with neem oil or an appropriate miticide at the first sign of infestation.
Why is my spiked kohleria rhizome rot in wet winter conditions?
If the plant is kept too wet when temperatures drop and growth slows, rhizomes rot rapidly. Taper off watering from late autumn, keeping compost barely moist, and resume normal watering only when new growth emerges in spring.
Why is my spiked kohleria no flower spikes in low light?
Insufficient light is the most common reason for failure to produce the characteristic flower spikes. Increase light levels significantly — ideally moving to a brighter window or adding full-spectrum grow-lights at 12–14 hours per day.