I'm in Canterbury, NZ and I have a dozen plants I've raised from seed. There not doing brilliantly so far but they're about 20cm tall. They have to fight against rampant twitch grass here so they have a bit of a struggle ahead.
Apparently they do well in frosty environments as they're from the Andes... I had one plant in before last winter, it appeared to die off but has resprouted this spring nicely. We had a couple of 6deg frosts, which were hard on everything...
