The video below shows the process of planting a potted tree onto your property. Many times this is required to allow the tree to continue growth, but it also provides better sunlight and watering for the tree. Trees are potted for various reasons, such as allowing the planter to move their tree wherever they'd like, or selling it to potential customers. But unless those are the reasons behind you keeping your plant contained, it's best to plant the tree on your property to help it reach it's full growth potential.
