Hydrangeas can tolerate how many degrees below zero
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Hydrangeas can tolerate how many degrees below zero
Hydrangeas can tolerate temperatures as low as -5°C. Prolonged exposure to low temperatures can easily cause frost damage. To ensure the plants survive the winter, apply a nitrogen-phosphorus-potassium compound fertilizer once before winter, stop fertilizing after entering winter, and reduce the watering frequency from once a day to once every three days. Too much watering can cause the hydrangeas to freeze, and the water temperature for each watering should be close to the room temperature.
Hydrangeas can tolerate temperatures as low as -5°C, and they can also endure short-term temperatures as low as -10°C. However, prolonged low-temperature cultivation can cause frost damage. In the northern regions, after entering winter, the plants should be moved indoors for maintenance, with the temperature controlled around 10°C.
In winter, the cold climate causes the overall function of hydrangeas to decline, and the rate of nutrient accumulation slows down. Before winter, apply a nitrogen-phosphorus-potassium compound fertilizer once to the plants. After entering winter, stop fertilizing to avoid root burn.
Hydrangeas prefer moist conditions, but the low temperature in winter slows down the evaporation of water, so the watering frequency should be reduced. From watering once a day to once every three days, excessive watering can cause the plants to freeze, and the water temperature for each watering should be close to the room temperature.
As the temperature drops in winter, the metabolism of hydrangeas slows down, and they are about to enter a dormant period. This is the time for pruning, with only 3 buds left on each branch. After winter, the winter buds will become more plump, enhancing the beauty of the plants.
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