Brown spots and edges in houseplants typically are caused by watering issues. I would first check to see if the plant is rootbound, which could prevent the roots from taking up water. That is most likely the cause. Additionally, it could be a fungus or even pests. Neem oil can help for both of these. For other reasons why plants get brown edges on leaves, this article will help: https://www.gardeningknowhow.com/plant-problems/environmental/what-causes-brown-edges-on-leaves-of-plant.htm
Answered on September 26, 2015
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