Winter Hardy (perennial) Hibiscus
Can winter hardy hibiscus be planted in a large container/pot or must they be planted in the ground.
There are many varieties of hardy hibiscus. Some of them get very large and difficult to manage. Also, plants in containers require winter protection. To overwinter outdoors plants in containers need to be 2 zones hardier than your zone. You may be able to place the container next to your house and cover with pine boughs or shredded leaves for winter protection. Or sink the container in the ground to protect the root zone from the cold temperatures.
It is best to plant the hardy hibiscus in the ground where the root system is protected. If the variety is small, you can experiment in a container.