My Ionantha Guatemala has these brown pitted spots on its lower leaves. I have had to remove quite a few leaves. The spots get bigger and eventually the top half of the leaf shrivels up and dies.
The plant is otherwise healthy with no other blemishes. Any guesses what could be going on?
It is grown sitting upright on a bamboo shelf under growlights (about 800 FC for 10 hrs) I water it under a running tap once a week and it dries upside down in front of a mini desk fan.
by NervousAnalyst7709