Rootex is a fabric that has a copper based latex coating on one side. You can buy pre-made growing bags to plant, for example fruit trees.
You dig a hole into the ground and bury the root bag.
The idea is that it stops the root tips from spreading and creates a fibrous root system.
You can also buy Rootex by metre length if you are wishing to create a barrier to prevent established plant roots planting into undesirable areas, such as paths. Established bushes or trees can be moved easily, at any time of year without disturbing the roots.
Why not give it a try?
Rootex is available from a number of suppliers.