why are my plants leaves turning brown

The main reasons why plant leaves turn brown include improper watering (either too much or too little), low humidity, fertilizer issues, environmental stress, and pests or diseases. For example, underwatering causes leaf tips to dry out and turn brown, while overwatering can lead to root damage, resulting in brown patches or edges. Low humidity can also cause brown leaf tips, especially in indoor plants. Excess fertilizer or salt buildup in the soil may cause brown leaf tips by drawing moisture away from roots. Additionally, too much direct sunlight can cause sunburn spots on leaves. Identifying the pattern of browning—whether at the tips, edges, scattered spots, or whole leaves—can help diagnose the exact cause and guide the appropriate correction, such as adjusting watering routine, increasing humidity, or reducing fertilizer concentration.