There could be several reasons why your alternanthera is losing leaves. Let’s go through some possible causes and solutions:
1. Light and heat: Alternanthera plants prefer bright, indirect light. If your plant is exposed to direct sunlight or high temperatures, it may be causing stress to the plant, resulting in leaf loss. Move your plant to a location with bright, indirect light and ensure it is not exposed to extreme heat sources like radiators or air vents.
2. Watering issues: Alternanthera plants require regular watering, but over-watering can lead to root rot and leaf loss. Make sure you are watering your plant when the top inch of soil feels dry to the touch. Ensure the pot has drainage holes to prevent water from sitting in the bottom, which can lead to root rot. On the other hand, under-watering can also cause leaf loss, so be sure to find the right balance.
3. Nutrient deficiencies: Alternanthera plants need regular fertilizing to maintain healthy growth. If your plant is not receiving enough nutrients, it may start losing leaves. Use a balanced, water-soluble fertilizer and follow the instructions on the packaging for application rates. Be careful not to over-fertilize, as this can also cause leaf loss or burn the roots.
4. Pests and diseases: Check your plant for any signs of pests, such as spider mites or aphids. These pests can cause leaf damage and eventually lead to leaf loss. Treat any infestations with an appropriate insecticidal soap or pesticide, following the instructions carefully. Also, be aware of any signs of diseases, such as fungal infections, and take appropriate measures to control them.
5. Environmental changes: Alternanthera plants can be sensitive to sudden changes in their environment. If you recently moved or made any changes to the plant’s surroundings, it may be experiencing stress, resulting in leaf loss. Give your plant some time to adjust to the new conditions, and ensure it is placed in a stable environment with consistent temperature and humidity levels.
The most common reasons for alternanthera leaf loss are improper light and heat exposure, watering issues, nutrient deficiencies, pests and diseases, and environmental changes. By addressing these factors and providing the necessary care, you can help your alternanthera regain its health and prevent further leaf loss.