Yellow leaves for a plant – too moist air, too hot or lack of elements in soil?

Question

I watered the plant at the end of October for the last time. Since that, the soil has been wet for a longer time. In November, when the temperatures started to drop down and it was cool in the flat, there was a bit of mold on the topsoil. Now the soil is not that wet anymore, it is more dry and it is warmer in the flat, but maybe there is still moisture in the air or other problems for the plant? Maybe I have kept the plant too close to a heater to make the soil more dry? Looking forward to hearing from you!

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Answer 1

Too much or too little water is often the reason for leaf edges to yellow. Philodendrons need moist soil but not wet. Provide good drainage so the plant is not sitting in water. Go ahead and remove the leaves that are discolored.

Here are more reasons for yellow or brown leaves:
https://www.gardeningknowhow.com/houseplants/philodendron/brown-philodendron-leaves.htm