Reasons for Yellowing Leaves on Rose of Sharon (Hibiscus syriacus) and How to Fix Them

Rose of Sharon is a common plant in everyday life, and many friends grow it at home, but many friends report that their Rose of Sharon has developed yellowing leaves. So what causes this? How should it be fixed? Let's take a look together.

1. Improper watering

Rose of Sharon is a plant that likes 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 and prevents the roots from breathing, so 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, or it can be placed on newspaper and peat moss to draw out the excess water, or simply taken out of the pot, the soil allowed to dry out, and then replanted.

2. Improper fertilizing

Although Rose of Sharon likes fertilizer, it must not be fertilized too heavily or too often. Fertilizing too heavily damages the roots, while fertilizing too often causes fertilizer burn; both inhibit root activity and cause leaves to turn yellow.

Solution: So when fertilizing, follow the principle of frequent light applications; generally, applying a low-concentration cake fertilizer once every half month is enough. When leaves turn yellow due to improper fertilizing, fertilizing should be stopped and clear water poured through to dilute it; it usually improves after a week. In addition, the potting soil can be refreshed or replaced.

3. Too much light

Rose of Sharon can grow in full light 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 and develop yellowing.

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 misting the leaves appropriately to prevent the leaves from continuing to 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 undersides of the leaves, and in severe cases they cause the leaves to turn yellow.

Prevention and treatment: Pest and disease control for Rose of Sharon should focus on prevention. If disease occurs, deal with it promptly and do not miss the best time for control. When disease occurs, diagnose it promptly, then treat it accordingly to completely eliminate the pests and diseases.

  The above is an introduction to the causes of yellowing leaves on Rose of Sharon and the solutions, and we hope it helps you. To learn more related knowledge, please follow us.