Hydrangea, also known as 八仙花 (eight immortals flower), is被誉为庭园中的“花中皇后” (praised as the "queen of flowers" in gardens) due to its beautiful flower shape and colorful appearance. During the maintenance process, many flower enthusiasts find that hydrangea leaves can turn yellow and red, which not only affects the ornamental effect but may also have an adverse effect on the growth of hydrangeas. This article will provide a detailed analysis of the causes and solutions for the yellowing and reddening of hydrangea leaves.
Reasons for Hydrangea Leaf Yellowing and Redding1. Insufficient watering
Hydrangeas require a higher amount of water. If watering is not timely and the soil is too dry, it can cause the leaves to turn yellow. Excessive watering can also lead to root hypoxia, causing the leaves to turn red.
2. Lack of fertilizer
Hydrangeas need ample nutrients during growth. If fertilizer is not applied for a long time or is unbalanced, it can lead to yellowing leaves. Too much fertilizer can also cause leaves to turn red.
3. Insufficient light
Hydrangeas prefer a semi-shaded environment. If they are kept in a dark place for a long time, it can lead to yellowing leaves. Intense direct sunlight can also cause leaves to turn red.
4. Diseases and pests
Yellowing and reddening of hydrangea leaves may also be caused by diseases and pests, such as hydrangea aphids and red spiders.
5. Planting environment
Hydrangeas have high requirements for soil. If the soil is too poor or has poor drainage, it can also cause leaves to turn yellow and red.
Solutions for Hydrangea Leaf Yellowing and Redding1. Moderate watering
Keep the soil moist and avoid overwatering. When watering, try to do it in the morning or evening to reduce water evaporation.
2. Reasonable fertilization
Choose the appropriate fertilizer based on the growth stage of the hydrangea. During the vigorous growth stage, nitrogen fertilizer can be applied, and during the flowering stage, phosphorus and potassium fertilizers can be used. Pay attention to the amount and frequency of fertilization to avoid excess.
3. Adjusting light exposure
Place the hydrangea in a semi-shaded environment and avoid intense direct sunlight. During the vigorous growth stage, light exposure can be increased appropriately to promote bud differentiation.
4. Disease and pest control
Regularly inspect the hydrangea and deal with diseases and pests promptly. Pesticides or biological control methods, such as releasing predatory mites, can be used.
5. Improving the planting environment
Choose well-draining soil and ensure good soil drainage. If the soil is too poor, organic fertilizer or compound fertilizer can be added.
Leaf yellowing and reddening are common issues during maintenance. Understanding the causes and taking corresponding measures can help enhance the ornamental value of hydrangeas. In actual maintenance, flower enthusiasts can flexibly apply the above methods based on their own situations to ensure robust growth of the hydrangeas.