Sorry, Les, I was in a hurry and did not explain that I meant I have not tried any of the kinds out there, and was adding the link to the US company. I did look up the superroots website also. I think they all rely on getting the roots to not circle the pot but to grow outward and air prune.
Both companies are sure pricey (proud of their products). Maybe it is worth it, don't know. Hopefully someone who has used them will chime in.
Walter
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