With the improvement of living standards, more and more people are trying hydroponic plants. Among them, Calathea has become a favorite in many households and offices due to its unique leaves and easy maintenance. The problem of yellowing leaves in hydroponic Calathea often plagues beginners and enthusiasts. This article will thoroughly analyze the reasons for yellowing leaves in hydroponic Calathea and provide corresponding solutions to help you cultivate healthy and green Calathea.
Reasons for Yellowing Leaves of Hydroponic Calathea1. Water Quality Issues
Hydroponic plants have high requirements for water quality. Hard water, alkaline water, or tap water with many impurities can cause Calathea leaves to turn yellow. The calcium and magnesium ions in hard water react with the organic acids secreted by the Calathea roots, forming precipitates that affect the absorption of water and nutrients by the roots; alkaline water can disrupt the pH balance of Calathea, leading to yellowing leaves.
2. Insufficient Light
Hydroponic Calathea requires ample light. If it is kept in a dark environment for a long time, the leaves will turn yellow due to a lack of photosynthesis. Strong direct sunlight can also burn the leaves, causing them to turn yellow.
3. Water Temperature Too High or Too Low
Hydroponic Calathea has a strong adaptability to water temperature, but water that is too hot or too cold will affect its growth. High water temperature can impede root respiration, causing leaves to turn yellow; low water temperature can affect the absorption of water and nutrients by the roots, leading to yellowing leaves.
4. Excessive Nitrogen Fertilizer
Hydroponic Calathea needs an appropriate amount of nitrogen fertilizer during growth, but excessive application of nitrogen fertilizer can cause leaves to turn yellow. This is because too much nitrogen fertilizer can inhibit the absorption of other elements, leading to an imbalance in Calathea growth.
5. Root Issues
The roots of hydroponic Calathea are prone to rot. If there are root problems such as hypoxia or pests and diseases, the leaves will turn yellow.
Methods to Solve Yellowing Leaves of Hydroponic Calathea1. Improve Water Quality
Use deionized water or purified water for hydroponics. If tap water is used, it should be filtered or left to stand to reduce water hardness. Regularly change the water to keep it clean.
2. Adjust Light
Place the Calathea in a location with ample diffused light, avoiding direct sunlight. If there is insufficient light, use a plant growth lamp to supplement.
3. Control Water Temperature
Keep the water temperature between 20-28°C, avoiding water that is too hot or too cold.
4. Apply Nitrogen Fertilizer Moderately
Apply nitrogen fertilizer according to the growth stage and needs of the Calathea, avoiding excess.
5. Pay Attention to Root Maintenance
Regularly inspect the roots, and promptly deal with rot or pests and diseases. Keep the roots clean and avoid hypoxia.
There are various reasons for the yellowing leaves of hydroponic Calathea. Understanding the reasons and taking corresponding measures can help cultivate healthy and green Calathea. I hope this article is helpful to you. If you want to learn more about hydroponic plant maintenance knowledge, please pay attention to related industry reports and data to better care for your plants.