Brown leaves on a palm plant can be caused by several factors. Identifying the cause is crucial in finding the right solution. Here are the common reasons for brown leaves on palm plants and how to address each issue:

1. Under watering: When a palm plant doesn't receive enough water, the leaves can turn brown and dry. To solve this, ensure the plant receives adequate water. Water your palm thoroughly, allowing the excess water to drain, and then let the top inch of the soil dry out before watering again.

2. Overwatering: Overwatering can also cause the leaves to turn brown, as it leads to root rot, which deprives the plant of necessary nutrients. To fix this, reduce the watering frequency and make sure your palm is planted in well-draining soil to prevent water logging.

3. Fertiliser burn: Excessive use of fertiliser can cause a buildup of salts in the soil, resulting in leaf burn. To address this issue, flush the soil with water to leach out excess salts. In the future, use a slow-release, palm-specific fertiliser and follow the manufacturer's guidelines for application rates.

4. Nutrient deficiency: A lack of essential nutrients, such as potassium, magnesium, or manganese, can cause brown leaf tips or margins. Apply a slow-release, palm-specific fertiliser containing the necessary micronutrients to correct the deficiency.

5. Cold or heat damage: Extreme temperature fluctuations can cause palm leaves to turn brown. Protect your palm from cold drafts, frost, or direct sun during the hottest part of the day. Gradually acclimate your palm to new temperature conditions if you're moving it between indoor and outdoor environments.

6. Pests or diseases: Insect infestations, such as spider mites or scale, or fungal diseases, like leaf spot, can cause browning leaves. Inspect your palm for signs of pests or diseases, and treat them with the appropriate insecticides or fungicides.

To prevent further browning of your palm leaves, ensure your plant is receiving the proper care:

• Provide the right amount of light (indirect sunlight or bright, filtered light for most palm species).
• Maintain consistent watering practices, allowing the top inch of soil to dry between waterings.
• Use a well-draining soil mix to prevent water logging and root rot.
• Fertilise with a slow-release, palm-specific fertiliser as per the manufacturer's recommendations.
• Keep your palm plant in a stable temperature environment, avoiding cold drafts or direct heat.

By addressing the underlying cause of the browning leaves and implementing proper care practices, your palm plant should recover and produce healthy, green foliage.