Living Gardens Landscape Design Hello. They are planted in the ground, however the owner likes to change out the seasonal plants regularly so she plants them in the ground in the containers. When the season is over, she removes the container and the hole is there ready to pop the next one in.
This house is in England but Higgins Brick has a similar one called Glacier Bay. If you contact them they can tell you where you can buy it locally.
www.higginsbrick.com