Answer: Brown leaf tips on houseplants can be a sign of low humidity, overwatering or using tap water that has fluoride or chlorine. You can use bottled water for your houseplants or you can allow your tap water to sit out overnight before using it. The chlorine should dissapate when exposed to air. You might also try misting your plants on a daily basis to increase humidity, or set them on a gravel filled tray into which you pour a little water. As the water evaporates it will increase humidity around the plants. A final suggestion is to water thoroughly but then allow the top half inch of potting soil to dry out before watering again. Plant roots need oxygen as well as moisture and overly wet soils can suffocate plant roots. I hope this information is helpful!
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