I have a large Ginseng Ficus with lots of new growth on top. My florescent fixture seems to be providing it with ample light, about 1700 lumens. It seems in good health but I noticed a few leaves, mainly larger and older one's beginning to turn yellow and then to brown slowly. Would this be a result of over-watering or under-watering? I only water when I feel the soil needs it.
Thanks for the help.