I'm planning on doing a detailed write up about dormancy here as soon as I can squeeze or in, but I'll sum up some info that should help you.
Cold temps and shortening daylight hours trigger the first stage of dormancy endo-dormancy. This is true dormancy. The plant is in a suspended state of animation. Nothing will break this dormancy until the plant counts the appropriate amount of chilling units. The second stage or alternative stage is eco-dormancy. This stage can be induced by shortening days, this stage can also be broken by weather.
Being you are in a pretty subtropical area. I would recommend to find an alternative dormancy solution for your VFT. The fridge method works well. I used it this past winter, my weather is the opposite as yours. It's too cold in the winter here, at least without some form of protection.
I would also just wait until next fall to worry too much about dormancy, since it's coming up on growing season now.
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