36+ Aloe Plant Tips Turning Brown. The brown color in the aloe plant turning brown is produced by the phenolic compounds that the plant synthesizes to protect itself from ultraviolet radiation (2). Temperature changes aloe vera plants are sensitive to sudden changes in temperature.
Although aloe plants are often used to treat sunburn, they can be very susceptible to sunburn themselves.
If the browning is confined to the leaf tip, and the leaf margin is still green, it's possible. Brownish, pinkish, maybe even a bit orange red on the edges. Sunburn will make aloe vera leaves turn dry and brown. Plants generally turn brown when they die.