This is my first dormancy, and I'm willing to admit I'm getting a little nervous watching all my VFT die back, but with those, I know they're supposed to. My concern comes up with my 'Dews. I know some require dormancy, and some don't, and I've even read up in Allen's WONDERFUL caresheet that it's the North American 'Dews that go dormant.
My question is- is there a general rule for how to tell a North American 'Dew from a Tropical 'Dew, or does one simply have to research each individual variety that they own? A general rule would be nice, as I'm lazy but I'm willing to look up each type if that's what I need to do to make sure that all my plants survive this coming cold season (Ok, I know Victoria doesn't get that cold, but I still prefer the blasting heat of summer).