Troubleshooting
Obscure Begonia problems — and how to fix them
Obscure Begonia (Begonia obscura) is generally low-drama, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Crispy or browning leaf edges
Low humidity is the most common cause in this high-humidity species; move to a terrarium or enclosed cabinet and check that ambient humidity stays above 60%.
Fungus gnats
Adults are attracted to moist compost; larvae damage fine roots. Allow the surface to dry slightly between waterings and use yellow sticky traps; treat with a Bacillus thuringiensis var. israelensis drench if numbers are high.
Prevent obscure begonia problems before they start
Most obscure begonia issues are care-mismatch, not bad luck. Dial in the basics:
Obscure Begonia problems — FAQ
Why is my obscure begonia crispy or browning leaf edges?
Low humidity is the most common cause in this high-humidity species; move to a terrarium or enclosed cabinet and check that ambient humidity stays above 60%.
Why is my obscure begonia fungus gnats?
Adults are attracted to moist compost; larvae damage fine roots. Allow the surface to dry slightly between waterings and use yellow sticky traps; treat with a Bacillus thuringiensis var. israelensis drench if numbers are high.