Indoor plants that develop brown leaf tips need humidity. The first measure should be to spray the plants with boiled cold water.
When the cold season starts again, many houseplants that you had in the garden during the summer show brown leaves. Especially the tips of the leaves become very brown and dry.
But this is primarily due to the heating air, because palm trees or dragon trees in particular need a lot of humidity. This is less the case in winter. Since the humidity should be at least 50 to 70 percent, you have to help yourself here.
Increase humidity
One measure here would be, for example, spraying the plants with boiled cold water, or setting up small water bowls or indoor fountains. This increases the humidity for the plants and at the same time creates a better indoor climate. If you also add a few drops of lavender oil, you can also prevent pest infestation at the same time.
Palm trees want it warm
Palm trees in particular should not be left in the cold in winter and you should bring them back inside as early as possible, because the first few nights of frost could damage the plants.