Re: who can enlighten me about sugar cane?
I've grown it in Z 3a, so you've got a heads up on me. Plant it early and harvest before the first frost and you'll be fine - it's big grass, so if you can grow Bamboo you can grow Cane.
However, for good sugar production (which is presumably why you'd be growing it) you'll need higher temps. Be aware that it's an intensely heavy feeder.