Reasons for Yellowing Leaves on Rose of Sharon and How to Fix Them

Rose of Sharon (Hibiscus syriacus) is a common plant in daily life, and many people grow it at home, but many friends report that their Rose of Sharon has developed yellowing leaves. So what causes this? And how should it be solved? Let's take a look together with the editor.

1. Improper Watering

Rose of Sharon is a plant that enjoys a warm and humid environment, but it fears waterlogging. If during care the plant is watered too much, the soil becomes wet and airless, which inhibits root respiration, preventing the roots from breathing, and the roots and stems will rot from lack of oxygen. In addition, overwatering causes the new leaves of Rose of Sharon to turn pale yellow, while the old leaves turn yellow and drop off.

Solution: For yellowing leaves caused by overwatering, watering should be stopped, and the plant should be taken out of its pot and placed in a ventilated spot with scattered light to dry out. It can also be placed on newspaper and peat soil to absorb the excess water, or simply removed from the pot, the soil dried out, and then replanted.

2. Improper Fertilizing

Although Rose of Sharon likes fertilizer, it should not be fertilized too heavily or too frequently. Too heavy fertilizing damages the roots, while too frequent fertilizing causes fertilizer burn, and both inhibit root activity and cause leaves to turn yellow.

Solution: So when fertilizing, master the principle of light fertilizer applied frequently; generally, applying a low-concentration cake fertilizer once every half month is enough. When yellowing leaves are caused by improper fertilizing, fertilizing should be stopped and clear water poured through to dilute it, and it usually improves after about a week. In addition, the potting soil can be renewed or replaced.

3. Excessive Light

Rose of Sharon can grow in full sunlight and also tolerates shade, but in summer, with high temperatures and strong light, if it is placed directly in the sun to bake without any shading, the leaves will be scorched by the strong light, resulting in yellowing leaves.

Prevention and treatment: In spring, autumn and winter, it can be placed directly in the sun for care, while in summer it needs proper shading, generally more than 50% shade, and then appropriately spraying water on the leaves to prevent the leaves from continuing to turn yellow.

4. Pests and Diseases

Yellowing leaves on Rose of Sharon may also be caused by pests and diseases. After some diseases occur, large black spots are left on the underside of the leaves, and in severe cases this causes the leaves to turn yellow.

Prevention and treatment: For pest and disease control on Rose of Sharon, prevention should be the main approach. Diseases should be dealt with promptly, and the best time for control should not be missed. When diseases occur, diagnose them promptly and then apply the right treatment to completely eliminate the pests and diseases.

  The above is an introduction to the reasons for yellowing leaves on Rose of Sharon and how to fix them. We hope it helps you. To learn more related knowledge, please follow us.