Re: Red Margin Bamboo
Sounds like you had a much harsher winter than I had. It only got down to about 4F last winter here on the coldest night according to my weatherstation so I'm probably in a warmer zone 6 than you. I hope that means I will be seeing 1/2 inch diameter canes next year given that they are reaching the 1/4 inch mark this year.
Red margin is pretty hardy, but not the hardiest. Parvifolia and Atrovaginata gets through winter with less damage than this here.
I also see that you have a barrier on the whole thing. Are you worried about it getting root-bound in there at all? It might require some rhizome pruning since rhizome & roots will be continuing to grow over the same area.
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