39+ Ficus Leaves Turning Brown. Department of agriculture plant hardiness zones 10 through 11, or as a houseplant. Crowded roots and too much nitrogen in the soil can cause leaves to turn brown and drop.
The basic care principles are similar, all plants want water, sunshine and warmth.
The leaves may turn yellow and fall off. The brown leaf edges are a generic symptom without one specific cause. However, lately, some (old) leaves are starting to turn brown at the tips and eventually fall off. On yours, browning start from edges, which is caused by nutrients distribution failure because water retention is too low, or water moving down too fast.