I believe I have a Philodendron Hope and over the past couple of months I have had leaves yellow and come off. They sort of yellow in stripes and the stalk becomes mushy. The tip of the stalk near the plant base also browns. The plant gets moderate light as it is between two windows though it does not receive direct light. I have begun to give it a little fertilizer because I heard it is a heavy feeder. Watering may be the issue as I do not have a regular schedule. Anything helps, thanks for reading!