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Yeah thats an awesome idea, at the moment I use bamboo sticks in the dirt to keep them up. By the time they need it the roots are so dense that I know I'm doing some damage with this method.

yeah, I found that bamboo can mold and mites like it... we just get the grid walls and take the time to unwind and store properly, sterlize and re-use, cause it's plastic.... it will be wonderful when all the gardening plastic things will be replaced by biodegradable HEMP!!!