What is the reason why the leaves of flowers turn yellow?

Yellowing of flower leaves is a common phenomenon, and basically everyone who grows flowers is likely to encounter it. When the leaves of the flowers turn yellow, it will not only affect the aesthetics of the entire plant, but may even cause the entire plant to wither and die, so it must be taken seriously. So what is the reason why the leaves of flowers turn yellow and what should we do? Let’s learn more about it below.

1. Improper moisture

Excessive watering will make the soil too wet, affecting root breathing and causing yellow leaves. Long-term lack of water will cause the roots to dry out and be unable to absorb nutrients normally, and will also cause the leaves to become malnourished and turn yellow.

Solution: Control the amount of watering reasonably according to the type of flowers and their growth stage. Watering should keep the soil moist, but not too wet. You can gently press about one centimeter below the soil surface. If it feels moist but no water flows out, it means the moisture level is appropriate.

2. Insufficient light

Flowers need proper light for photosynthesis. If flowers are kept in a shaded environment for a long time or are placed in a location that is too dark, yellow leaves will appear.

Solution: Generally most flowers prefer sunlight and can be placed in a place with sufficient light for photosynthesis. However, when the sun is strong in summer, appropriate shade is needed to avoid direct sunlight to prevent leaf burns.

3. Temperature discomfort

Temperatures that are too high or too low will hinder the physiological functions of flowers, affect their normal growth, and cause symptoms such as yellow leaves.

Solution: Provide suitable temperature environment according to the habits of flowers. When the temperature is high in summer, you can lower the temperature by shading, spraying, etc.; when the temperature is low in winter, you can raise the temperature by adding coverings or using heating equipment.

4. Unsuitable soil

Problems such as soil compaction and salinization may also cause yellow leaves of flowers.

Solution: Turn the soil in time, improve soil structure, and increase organic matter to increase soil permeability and water retention.

5. Improper fertilization

Too much fertilizer will cause the root system to be overburdened and even cause root burn. Applying too little fertilizer will cause the flowers to lack nutrients and affect the color and texture of the leaves.

Solution: Choose the appropriate type and concentration of fertilizer according to the type of flowers and their growth needs. Before applying fertilizer, you should first understand the properties of the fertilizer to be used to avoid fertilizer damage caused by improper fertilization.

6. Impact of pests and diseases

Pests and diseases are one of the main causes of yellow leaves on flowers. Common diseases such as black spot and powdery mildew will cause spots to appear on the leaves, which will then turn yellow and fall off; while pests such as aphids and scale insects will suck the sap from the leaves and cause yellow leaves.

Solution: Check flowers regularly and treat them with appropriate pesticides if any pests or diseases are found.

In general, although there are many types of flowers, the causes of yellow leaves are roughly the same. By mastering the above solutions and methods, you can effectively solve the problem of yellow leaves of flowers.