If you don't water your plant enough, the leaves can dry out, leading to brown tips. Solution: Check soil moisture regularly and water when the top inch feels dry.
Too much water can cause root rot, which stresses the plant and leads to brown tips. Solution: Ensure proper drainage and let the soil dry between waterings.
Some plants, especially tropical varieties, require higher humidity. Dry indoor air can cause the tips to brown. Solution: Increase humidity with a humidifier or by placing a tray of water near the plant.
Too much fertilizer can burn the roots, leading to leaf tip damage. Solution: Fertilize sparingly and follow the recommended schedule for your plant type.
Hard water or excessive fertilizer can leave salt deposits in the soil, which harms the roots. Solution: Flush the soil with water occasionally to remove excess salts.
Exposure to cold drafts or sudden temperature changes can cause stress and browning on the leaves.
Some plants naturally have older leaves with brown tips as they age. Solution: Trim the brown tips with clean scissors to maintain the plant's appearance.