I wouldn't think you'd (ok - your tree would) be in much danger from cold, but the heat has me concerned. I'm afraid that on the south exposure your tree (the soil) will get warm enough to induce growth. If that happens, and the tree starts to put on a flush of foliage, the first freeze will kill it; or, if sap freezes after rising up the trunk, then you'll have freeze damage that could also kill or severely damage the tree. A colder, north exposure would be better or the garage. Make sure it doesn't dry out in either place.

Al

I'd be concerned, like Al is, cuz I live in this zone (Middle TN) and it gets both too cold & too hot for that plant. Maybe cool shade in the Summer with a little bit of morning sun and a basement type area in the Winter, to kind of go dormant. Indoor sunlight won't be as healthy for it, IMO.

The plant will not do well over-wintering in conditions that see several consecutive days of temperatures above about 42*, because that will move it to active growth and then you have to nurse a temperate plant through a winter indoors, at which I guarantee it will revolt.

You're right about the summer sun, though. Being an understory plant you usually find more often on north slopes, it will likely not appreciate a southern balcony exposure.

Al

Ok thanks