Re: Dwarf Namwah cold hardiness
Honestly? I don't have the slightest idea.
The D. Orinoco should be a tiny bit hardier than the d. namwah. Still, it managed to die, despite being in pretty much the same place. My best guess is, that since the Orinoco itself was a bit smaller, it was also more tender. But it's just a guess.
For sure the bi pstem of the dwarf namwah must have given some kind of insulation because right now the cold damage parts are peeling of revealing an healthy (albeit smaller) pseudostem.