Back in the time known as B.G. (Before Greenhouse) the tender plants were stored in three areas of our house, dormant brugmansias & musas in the basement, other plants in an unfinished room upstairs or in the stained glass "greenhouse" which was part of the back porch. Now in A.G. time, that space has mysteriously filled up and those areas are now back in service although not as crowded as they once were.
I can throw a space heater in here if it gets really cold.
Experimenting this winter, I've also put some plants that are hardy to cold but not wet, in available space under the roof of the side porch.
A few bromeliads have been brought into the house for the winter but most will spend the cold months in the greenhouse.
Look, there's still space on that chair for a couple of abutilons.
The green cart gets pulled out and will hold a couple of brugmansias. I've taken cuttings of several large plants which will stay outside this year.
All that remains to come in is the large Ensete ventricosum, the aforementioned brugmansias and abutilons, tuberous begonias (basement bound) and, only for the coldest part of the winter, a couple of cordylines. Maybe it's time to stop living so much in zonal denial. On the other hand, being able to walk through one's home without being thwacked in the face by some plant or other is overrated, don't you think?