Hmm, weed cloth! That would be better than plastic. Thanks.
>> I know bamboo will.
I've been surprised that (so far) I've been able to contain Fargesia rufa (a clumping bamboo) with just some paving stones stood on end (a mini-raised bed).
I think that, maybe, the edges of the bed dry out so fast that the roots (rhizomes?) don't even try to escape the center of the bed. And the bed sits on top of some heavy clay, so that (maybe) up to now they have not had much motivation to go deeper to escape.
But the location of the new compost heap will tempt them!
