I'm looking for potato onions and Arctic Beauty kiwi (male and female cutings or plants), timber bamboo (P. nigra, P. dulcis, P. edulis, P. bambusoides), Pseudosasa japonica. I have cuttings from peaches, nectarines, apples, grapes and apricots. I also have dwarf rootstock for grafting so you can make small trees/bushes of the above. I also have everbearing strawberry plants and blackberry plants.

It's hard to say as there are several green timber bamboo that it could be. You can rule out vivax based on the wall thickness you observed. I think it could still be bambusoides. Take a look at this link and see if any of the pictures resemble what you have. Here is a link that might be useful: Ph. bambusoides

It has gotten as cold as 6F already with most of the foliage covered in snow during the chill, but there's still no visible damage on any of the leaves so I think moso is at least hardy into the single digits. Anything colder than this and without the snow cover can probably burn it badly, but I'll dump extra snow on top if it gets below 0F and too much foliage is out of the snow. I think moso may be hardy to zone 5 as long as it snows all the time. The good thing is that these top heavy culms always get weighted down by the snow so I can depend on them getting lots of insulation. Here is a link that might be useful:

Mr. Dingo, I am in z6...north west jersey. I have some nigra growing outside. the culms didn't make it but it sent up shoots in the spring. Needless to say, I was pretty happy. At this point, they are still small. Maybe 3 ft. I was planning on mulching them heavy. last winter i gave them minimal protection just to see how they faired. our winter was pretty cold. I believe with mulching, they will do better this winter/spring. As far as your plants being in pots....If you want....i might try this....bring them in i would say before the first real cold spell(32 degrees or below).....not sure when that would be but i'm guessing before thanksgiving. you can hang a painter's light with a grow light bulb in it overhead. set it at a 10 hr light cycle(timer).....you wouldn't want it to disrupt its natural light cycle....if you are concerned about the pot freezing, plug in a small string of christmas lights and put them around the pot. Now i have never done any of this but from reading about some of you Ontario people...they have some pretty good ideas about keeping Palms alive thru your winter. (Palm Forum) Sounds a bit creative but it might work for you. I would think that you don't want to "shock" it into a growing cycle but just want to keep it dormant and above its cold hardy min. temp. Wind plays a big role in winter along with winter sun. Bringing them in your garage with a light bulb on it for 10 hrs a day eliminates the strong sun rays and eliminates the wind factor. Maybe water with ice cubes every once in a while. these are just some of my thoughts. Take it for what they are worth....I might be trying this with my Moso this winter. Now if you want to winter them as houseplants...then that is a whole diff. ballgame. Michele.... Sorry to say but all of the "experts" in your group follow this forum as well....no offense intended....as a matter of fact, Bill's site came from discussions in here....I also don't want to get into a discussion about what group to belong to either.....Just don't want people to believe that this group isn't a good one when i feel it is the Best out of all of the ones i have belonged or been to. Nicest people and very informed. Like i said no offense intended. Everyone is "new " to something at least once. It would be a shame if someone "new" to this forum was turned in a direction away from most reliable sources frequent. Kurt