So I have a bunch of those death cube VFTs (and one S. purpurea) that I bought from grocery stores. They are inside currently, under grow lights. I live in zone 7 and am unsure where to put them for dormancy later this year. I have an attached garage, but there is no window, so no sunlight. This site says I can put them in a mini greenhouse outside to protect from cold, but the only place I can put it is a covered porch that faces North that gets no sun. Will this be okay? What do you guys and gals suggest?