Hydrangeas are considered robust and hardy plants. But they cannot tolerate all temperatures either. In this article you will find out at which temperatures they thrive best and when you need to protect them from strong temperatures.
What temperatures can a hydrangea tolerate?
Optimal temperatures for hydrangeas are between 15 and 20 degrees Celsius. They are hardy down to -10 degrees Celsius without additional protective measures. At higher temperatures, the perennials should be watered more frequently and direct sun should be avoided.
What temperatures are optimal for hydrangeas?
Hydrangeas feel most comfortable at a temperature between15 and 20 degrees Celsius. In cooler temperatures it grows more slowly and produces smaller flowers. If it is significantly warmer, there is a risk of drying out and burns.
How well does a hydrangea tolerate frost?
Hydrangeas are hardy and generally cope well with frost down to -10 degrees CelsiusExceptions are young plants, individual hydrangea varieties and persistent frost over a longer period of time. You should be particularly careful with late frost, which can cause new shoots to freeze. In particular, varieties that are not frost-resistant should be covered with fleece over the winter or overwintered in a place protected from frost.
How well do hydrangeas cope with heat?
Heat can severely damage hydrangeas, as can frost. Due to their high water requirements, the perennials have a high risk of drying out on hot days. Moisture evaporates very quickly through their large leaves. Direct sunlight can also cause sunburn on the leaves.
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Protecting hydrangeas from extreme temperatures
With the right location and appropriate care, you can protect your hydrangeas from being affected by strong temperatures. A location in partial shade protected from wind and regular watering helps on hot days. In winter, the hydrangeas can be protected by winter protection or a change of location. Professional pruning at the right time also helps the plant to grow vigorously again after the winter.
