They're 2'-3' tall and planted in my nursery. Now I want to dig and put them in containers.
How to Plant Blue Spruce Trees From Field to Containers
Certified GKH Gardening Expert
Just dig up the root ball with as much of the soil as possible and put it in a large enough container to accommodate the roots (likely 2- to 5-gallon pots). Mix in some well-draining potting soil and ensure that the container also provides adequate drainage. The following articles should also help: https://www.gardeningknowhow.com/special/containers/how-to-grow-container-trees.htm