Hi, I'm from belgium, zone 7a
what I do is leave the basjoo's in the ground.
I put a wouden beam streat into the groun next to the group of basjoo's, 2m high
the I use iron fence (chickenwire) to cirkel around the basjoo's and and attach it to the beam, you can do that up to 2m high were the beam stops.
next chop down all the leaves of the basjoo's en put them upside donw as insulation in the fence, I collect leaves/grass and put is all in the cirkel you created with the fence for insulation. Then I use bubblefoil to cirkel 2 times around the fence and attach it to the wooden beam, on top I also bubblefoil. I close I all with a large plastic bag I put over the top. 2 winters a go we had -18C° and the basjoo's were fine. If you need a picture let me know.
regards Robi
