Causes and Solutions for Curling and Yellowing Leaves on the Calathea

Curling leaves and yellowing leaves on the Calathea are caused by certain aspects of the plant's growing process, as well as conflicts between the environment and the Calathea's growth habits. If you want the plant to grow well, it needs to be in harmony with its environment. Therefore, we need to look for the causes in the Calathea's growing environment.

Causes and Solutions for Curling Leaves on the Calathea

1. Too much light

As everyone knows, the Calathea can only grow normally in a semi-shaded environment, so normally you only need to place it in a bright spot indoors where it can receive some indirect light to meet its light needs. If the light is too strong, especially if strong direct light falls on the plant, it can easily cause leaf curling, and with slightly more severity, scorched edges and yellow leaves will appear.

Therefore, during care and management, we must find a place for the plant that can shield it from direct sunlight. It is recommended to place it indoors, such as in the living room, study, or even near a windowsill. In short, it must not be in an environment exposed to direct sunlight.

2. Lack of water

Since the Calathea is not drought-tolerant and has a high water requirement, if the potting soil stays on the dry side and the air is dry for a long time, it can easily cause leaf curling due to lack of water. Therefore, we need to provide the plant with sufficient water from both soil moisture and air humidity to promote healthy growth.

For the potting soil, it is recommended to keep the soil consistently moist, watering promptly and in good time to ensure the water supply the plant needs; for air humidity, spray water on the leaves regularly, and you can also spray water on the ground around the plant to raise air humidity.

Only when we have done enough work on light and watering will the plant avoid leaf curling, yellowing, and scorched edges caused by improper light or improper watering, so that the plant always maintains normal growth.

What to Do When the Calathea's Leaves Turn Yellow

1. Light as a cause of yellowing leaves on the Calathea

The Calathea is a shade-loving plant, and diffused light is best for it. When caring for the Calathea, direct sunlight must be avoided. Do not place the Calathea in direct sunlight, because this will cause sunburn, making the leaves fade in color, lose their luster, and gradually turn yellow.

2. Poor ventilation as a cause of yellowing leaves on the Calathea

The Calathea likes shade, so it is better to place it in a cool spot with little sunlight, but you cannot keep the Calathea in a poorly ventilated and dark place for a long time, as this will also cause the Calathea's leaves to turn yellow and even drop off.

3. Lack of water as a cause of yellowing leaves on the Calathea

Lack of water can also cause the Calathea's leaves to turn yellow. When the Calathea lacks water, the potting soil will dry out and cannot meet the Calathea's growth needs. In daily life, water control needs to be carried out reasonably, watering regularly; when the potting soil looks dry, water it, and when watering, be sure to water thoroughly to keep the potting soil moist, preferring moist over dry.

4. Low temperature as a cause of yellowing leaves on the Calathea

The Calathea is not cold-tolerant, and in winter the growing temperature needs to be kept above 12°C. When the temperature is too low, it will have an adverse effect on the Calathea's growth and may cause cold damage. Cold damage will cause the Calathea's leaves to turn yellow. You need to take measures to help the Calathea overwinter safely and ensure a suitable growing temperature.

5. Pests and diseases as a cause of yellowing leaves on the Calathea

Pests and diseases are a major obstacle to plant growth. When the Calathea is troubled by pests and diseases, various problems will appear. For example, if the Calathea develops leaf spot disease and leaf blight, these are diseases that affect the leaves, causing the Calathea's leaves to develop spots, wither and yellow, and even drop off, and in severe cases harming the entire Calathea plant. Medication can be used for treatment.

What Common Pests and Diseases Does the Calathea Have

The common pests and diseases of the Calathea mainly include southern blight, leaf spot disease, scale insects, red spider mites, and other damage.

The Calathea's Growth Habits

The Calathea likes a warm, humid, and shaded environment. The suitable growing temperature is 20-30°C; it needs more water, is not drought-tolerant, is fairly heat-tolerant, and slightly cold-tolerant, and can overwinter safely above 5°C. The Calathea is afraid of frost and likes loose, fertile, moist, and well-drained acidic soil.

Besides being prone to yellowing and curling leaves, pest damage is also a major threat affecting the Calathea's growth. Therefore, in the daily care of the Calathea, it is necessary for us to monitor the Calathea's growth condition, so that the Calathea can grow better.