What is the minimum cold tolerance of hydrangeas?
A comprehensive introduction to the minimum cold tolerance of hydrangeas, and the following is the introduction by the editor.
What is the minimum cold tolerance of hydrangeas?
Hydrangeas have a minimum cold tolerance of 5℃, and they have poor cold resistance. If the temperature remains below 5℃ for a long time, they will be frostbitten, and even the whole plant may die. In the northern regions, they must be moved indoors for maintenance after the winter begins, with the temperature controlled around 10°C. Watering must be strictly controlled to prevent excessive watering and avoid water accumulation in the pot, which can cause root frostbite and is not conducive to the healthy growth of the plant.
Hydrangeas have a minimum cold tolerance of 5℃, and they have poor cold resistance. If the temperature remains below 5℃ for a long time, they will be frostbitten, and even the whole plant may die. In the northern regions, they must be moved indoors for maintenance after the winter begins, with the temperature controlled around 10°C to survive the winter safely.
After the winter begins, the evaporation of water is slow, and the water demand of hydrangeas also decreases accordingly. At this time, water must be strictly controlled to prevent excessive watering and avoid water accumulation in the pot, which can cause root frostbite and is not conducive to the healthy growth of the plant. It is better to supplement water only when the soil becomes dry.
In regular maintenance, hydrangeas can be fertilized appropriately to promote growth. However, fertilization should be stopped after entering winter, as the nutrients in the soil can meet the plant's needs for surviving the winter. If fertilizer is applied again, it may lead to excessive nutrients and yellowing of the leaves.
In winter, the humid and cold environment can easily cause hydrangeas to suffer from downy mildew. If infected, the leaves will gradually rot. Diseased leaves should be cut off in time to prevent the spread of the pathogen. Then, dilute mancozeb in water and spray it on the surface of the plant for prevention.
The above information about the minimum cold tolerance of hydrangeas is hoped to be helpful to you!