Hey yall- I have this guy that has started to yellow slowly at first and now very aggressively. I water when the plant is dry about the first 3-4 inches and keep one of the plants pictured in a rock tray to increase humidity. All of these guys were in the same pot when it was gifted to me so I separated them and to u have been thriving until a few months ago I noticed some yellowing in the trunk of the plant and now the leaves. It gets indirect bright light for about 10+ hours a day depending on the season. I included one of the guys that is not yellowing that lives on the same table with the same amount of light as the one with the most yellow. The last few waterings I’ve also only used distilled water if that’s helpful info. They are also very prone to leaning and one has a sap like substance on it especially on the main stalk. Could it be that they just want a bigger pot or inconsistent watering? Or something else- thanks in advance!
