To keep a plant healthy it very essential that roots are kept in good shape and size.
Roots exploit all the available nutrients at their disposal and spread in the space in the pot.
Normally to keep a plant hale and happy we plant it in a large container and prune its roots regularly. Pruning is very essential as it helps renew the vigour of the tree by allowing root system to grow. With each passing year we get the venerable characteristics of age to the trees, through exposed root base and maturity. Annual root pruning and subsequent repotting affords us an opportunity to observe the root age and check if any damage is caused down under or even the existence of disease or pests. While pruning soft, water logged, breakable roots are first pruned.