Definitions for "ROOT PRUNING"
This is done in two instances. One when repotting from one pot to another, roots that have grown in a circle are trimmed to promote future growth. Also, when planting into the garden or landscape, a plant that needs root trimming.
Root pruning involves cutting off certain parts of the root system in order to restrict plant growth
cut or remove any circling or girdling roots; cutting roots to increase density of root mass.