- Dry air, especially once the heat is on.
- Uneven watering: soil that swings from soaked to bone-dry.
- Minerals in tap water. Spider plants, dracaenas and calatheas are especially sensitive to salts and fluoride, so filtered water or rainwater can help.
- Fertilizer buildup. Every few months, water slowly and thoroughly to flush the soil.
Brown tips won't turn green again, but you can trim them with clean scissors. Follow the natural shape of the leaf and leave a thin line of brown, so you don't cut into healthy tissue.
