Gradual defoliation (lower leaves yellow and fall) ... Overwatering (root damage), underwatering (not enough water to support full foliage), lack of sufficient light, or lack of fertilizer.
Gradual defoliation (lower leaves yellow and fall) ... Overwatering (root damage), underwatering (not enough water to support full foliage), lack of sufficient light, or lack of fertilizer.
逐渐落叶（下端叶子变黄脱落）...浇水过多（伤根），浇水不足（没有足够的水供所有的叶子），缺光，缺肥。