Does Hydrangea fear the cold? Can it be left outdoors in winter?
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Does Hydrangea fear the cold? Can it be left outdoors in winter?
Hydrangea does not fear the cold. In the south, it can be left outdoors to overwinter. However, in the north, once the temperature drops to 0 degrees, it is best to move it indoors to prevent the plant from freezing. When kept indoors, the temperature should be maintained above 10 degrees, and water should be given every 10 days. Open the windows for ventilation when the temperature is high. Also, in early spring, around March, it is necessary to repot and change the soil for Hydrangea, pruning the roots and branches.
Hydrangea does not fear the cold and prefers a warm, slightly cold-tolerant environment. The suitable temperature for growth is between 18-28 degrees. It can tolerate temperatures as low as minus 5 degrees and can also briefly withstand minus 10 degrees. However, it will suffer frost damage if exposed to low temperatures for an extended period and needs to be kept indoors for overwintering.
When planting Hydrangea in the south, it can be normally maintained outdoors and overwintered in situ. In the north, it should be moved indoors when the temperature drops to 0 degrees to prevent the branches and roots from freezing. Keeping the indoor temperature above 10 degrees can ensure safe overwintering.
In the south, during overwintering, Hydrangea should be placed in a sunny and sheltered position, watered sufficiently before the soil freezes, and receive more than 6 hours of sunlight daily. In the north, during overwintering, it should be placed in a sunny position indoors, maintaining room temperature, watering every 10 days, opening the windows at noon for ventilation, and maintaining air circulation.
Hydrangea needs to be repotted and the soil changed once a year during its cultivation period, preferably in early spring, around March. When repotting, prune the decayed and overly long roots and place it in a shady and well-ventilated position for 10 days before moving it outdoors. After the flowering period, prune the old branches and cut off the top of the branches in the fall.
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