If you place the plant into the ground or into another pot without first loosening the balled up roots, they will continue to grow in a circle, rather than reaching out into the soil, developing and anchoring the plant. So although it may seem like a harsh thing to do to your plants, you are actually helping them by roughing up the root ball.
In most cases, you can loosen the roots with your fingers. In extreme cases of pot bound roots, you may need to slice through the root ball with a sharp knife or pruners. Do this in several spots around the root ball, to encourage root growth in all directions.


