Root pruning is a gardening technique that involves cutting back the roots of a plant to promote healthier growth. This process can help manage the size of the plant, improve nutrient absorption, and encourage the development of new roots. It is often used for potted plants or trees that have become root-bound, where roots grow in circles around the pot instead of spreading out. The best time for root pruning is during the plant's dormant season, typically in late winter or early spring. After pruning, it is essential to replant the plant in fresh soil and provide adequate water to help it recover. Proper root pruning can lead to a stronger and more vigorous plant in the long run.