Potted Hydrangeas require the same level of winter maintenance as their in ground counterparts.
How to Care for Potted Hydrangeas in Winter Q:
Do potted hydrangeas need to come inside for the winter? What’s a year-round care strategy for them? I’ve been keeping them in the garage during the cold season.
Hydrangeas, as you are probably well aware, are a great patio container plant.
You’ll also be happy to hear that winter care requires nominal effort. Now that you’ve moved your hydrangeas into the garage, you can lug them back outside again because that is the best place for them over the winter. In most zones, you can leave hydrangeas on your patio unprotected, as they are very cold hardy. Some are even just fine in zone 2, which can get as cold as minus 40 C! Ouch. Every hydrangea has a different tolerance and even though they all can handle a certain amount of cold, ensure that you have a variety appropriate for your climate. And if you are planting in a container, zone up! (See below.)
Ensure that the containers they’re planted in have adequate drainage, as poor drainage can do serious damage to the plants. Otherwise your hydrangeas will be just fine, requiring the same maintenance and care as they would out in the garden.
Remember, too, that the best time to prune your hydrangea is in the fall.
Zone up those container plants
If you are planning to grow a perennial in a pot, zone up to ensure success! In a container, your plants have less protection from the cold than they would have in the ground. So if you live in a zone 4, for example, I would recommend that you select a plant variety that is hardy to zone 3.
Cold hydrangeas survive over the winter months with nominal effort.