Q: Why do the color patches on leaves of foliage plants fade or disappear?
Answer: 1. The light is too strong or too cloudy. Most foliage vegetative and semi-negative environments. When the light intensity is too strong, besides the occurrence of sunburn phenomena such as yellow leaves and coke edges, some of the variegated plants will fade or disappear. Overcasting in the environment can cause fallen leaves, thin and thin stems and leaves, and smaller leaves, while the leaves lose their unique luster and color.
2. Too much nitrogen fertilizer. Excessive application of nitrogen fertilizer may cause discoloration of leaves of foliage plants with colored markings. In order to avoid this situation, the application of nitrogen fertilizer should be accompanied by the application of phosphorus and potassium fertilizers. For example, 0.1% urea and 0.2% potassium dihydrogen phosphate should be used as top-dressing fertilizers. Not only it can promote plant growth, but also can make the plant's stains and streaks. More vivid.
3. Disease and insect damage. Some leaf-colored foliage plants, such as Phnom Penh, Dragon's Blood, Phnom Penh, and Fragrant, etc., when they are damaged by red spiders, will cause the leaves to fade and should be promptly controlled.
4. Too much watering. Some foliage plants, such as Sansevieria, will become white when they are over-watered, and their color on the leaf surface will also become lighter.
5. Character reduction. Some colored foliage of foliage plants is derived from the variation of simple green leaves. During the growth process, some branches and leaves will recover the original traits and lose the phenomenon of plaque or stripes.