..... could be related to the misting as wet leaves provide the extended period of constant moisture fungal spores need to germinate, but by the look of the plant, it needs an appropriate fertilizer. It could also be that you're keeping the grow medium TOO moist. In saturated soils that drain poorly, low oxygen levels cause Fe (iron) and Mn (manganese) to become electron acceptors. This leads to the precipitation of both (makes them insoluble and unavailable to the plant), even though these elements might be present in soils at normally adequate levels, and the plant's inability to assimilate them. Soggy soils also make uptake of Ca difficult or impossible.
Getting your watering intervals right is a key element of any care regimen.One of the most reliable methods of checking a planting's need for water is using a 'tell' (more reliable than a 'moisture meter'. You can use a bamboo skewer in a pinch, but a wooden dowel rod of about 5/16" (75-85mm) works better. They usually come 48" (120cm) long and can usually be cut in half or in several pieces, depending on how deep your pots are. Sharpen both ends of each tell in a pencil sharpener and slightly blunt the tip so it's about the diameter of the head on a straight pin. Push the wooden tell deep into the soil. Don't worry, it won't harm the root system. If the plant is quite root-bound, you might need to try several places until you find one where you can push it all the way to the pot's bottom. Leave it a few seconds, then withdraw it and inspect the tip for moisture. For most plantings, withhold water until the tell's tip comes out nearly dry. If you see signs of wilting, adjust the interval between waterings so drought stress isn't a recurring issue.
When did you last fertilize?
Al
