Hydrangea, with its unique spherical flower clusters and rich colors, has become a favorite of many gardening enthusiasts. During maintenance, many flower friends will find that the leaves of hydrangea turn yellow or red. This not only affects the ornamental value but may also threaten the growth of hydrangea. This article will delve into the reasons for the yellowing or reddening of hydrangea leaves and provide corresponding solutions to help flower friends maintain this beautiful flower.
Reasons for hydrangea leaves turning yellow or red1. Improper water management
Hydrangea prefers a humid environment, but excessive watering can lead to root hypoxia, which in turn causes the leaves to turn yellow. Uneven watering or water droplets remaining on the leaves can easily lead to leaf redness and mildew.
2. Insufficient sunlight
Hydrangea requires ample sunlight. If it is kept in a dark environment for a long time, it can lead to poor leaf growth and cause yellowing or reddening of the leaves.
3. Improper application of fertilizer
Excessive application of nitrogen fertilizer will make the hydrangea leaves dark green, while a lack of nitrogen fertilizer will cause the leaves to turn yellow. Uneven fertilization or fertilizer residue may also lead to leaf redness.
4. Pest and disease infestation
Hydrangea is prone to infestation by pests such as aphids and red spiders. These pests extract nutrients from the leaves of hydrangea, causing the leaves to turn yellow or red.
5. Environmental factors
Environmental factors such as temperature and humidity also affect the growth of hydrangea leaves. In the hot and humid summer, hydrangea leaves are prone to diseases, leading to yellowing or reddening of the leaves.
Solutions1. Optimize water management
Keep the soil moist but avoid waterlogging. When watering, try to water the roots thoroughly and avoid leaving water droplets on the leaves.
2. Provide adequate sunlight
Place the hydrangea in a place with plenty of sunlight but avoid direct sunlight. If kept indoors, move the pot to a position with sufficient sunlight regularly.
3. Reasonable fertilization
Apply nitrogen, phosphorus, potassium, and other fertilizers according to the growth needs of hydrangea. When fertilizing, pay attention to even fertilization and avoid fertilizer residue.
4. Control of pests and diseases
Regularly check the hydrangea and deal with pests and diseases in a timely manner. Pesticides and fungicides can be used for prevention and control.
5. Adjust environmental factors
In the hot and humid summer, provide appropriate shading and maintain air circulation. In the cold winter, pay attention to keeping warm.
There are many reasons for the yellowing or reddening of hydrangea leaves. Flower friends should analyze the actual situation and take corresponding measures. Only by mastering the correct maintenance skills can hydrangea grow robustly and bloom beautiful flowers. It is hoped that this article can provide useful references for flower friends.