Plastic root pruning pots are a common upgrade for growers from standard nursery pots. Root pruning occurs in these plastic pots when roots tips grow through the outer walls and are met with air on the outside, causing the tip to die. When this happens, secondary growth occurs, …giving your roots a much more complex and robust structure. Additionally, these pots can be deconstructed while growing a plant to make transplanting a breeze. HTG Supply carries top brands like Air Pots, Oxy Pots, and Super Roots.