Garden hydrangea
How do I protect my patio or balcony hydrangea against frost?
With Magical hydrangeas you can experience the natural beauty of the seasons every day. In the winter too! Luckily, hydrangeas can tolerate some cold and are frost resistant due to their origins in Asia. But beware of severe (night) frost. Hydrangeas can survive the frost, but the buds can be damaged. And that would be a shame.
Cover your hydrangea if frost is expected at night
In case of an early season, severe night frost, for example if the temperature reaches below freezing, it's best to cover garden hydrangeas with a fleece cloth or bed sheet. This will prevent air moving through the branches and keep the temperature more constant. This is particularly effective for plants that are in pots, and will extend their life on your patio or balcony.
Or move your hydrangea indoors when it's frosty
If you would like to keep your hydrangea in a pot and reuse it next season, let the plant freeze to the point where all its leaves turn brown and fall off. Once that happens, move the entire pot indoors and place it in a sunny window. Remove the brown, dead leaves and keep the plant moderately warm, above 40 degrees F or 5 degrees C, and in a sunny window. As we move into the spring months, you will notice new, green leaves unfurling. You can safely move your hydrangea pot outside once the temperatures in your area are consistently above freezing.