Brassica growers claim they never suffer from club root. The truth is that they can rarely eliminate club root, but if the root system is strong enough it will resist it. Victorian gardeners used to prune brassica roots, and some even had long bottomless pots which enabled them to achieve similar results to
Rootrainers.
One brassica grower claimed he had never suffered from white fly since he had used Rootrainers. Well, we can’t guarantee you will be free from white fly. All it means is that he has had healthier, stronger plants since he has used Rootrainers and they have proved much more resistant. You can’t ask for more than that!