Yes don't let i get frosted

It depends on whether or not the light is direct or reflected. Your balcony can face south and still be in the shade if there are trees or tall buildings blocking direct light. Too, there is a big difference in the amount of available light a plant needs to thrive, rather than just survive.

Al

There's also the wind factor. So it all depends on your specific situation.

Balconies are not easy environments for most plants, but it depends on how exposed they are to the elements (wind and sun). I used to struggle with a balcony garden in zone 7a/b NJ, western exposure, HOT AS HE!!, with a brick wall in the back and no protection from sun or wind (as it was on the side of a hill). Those years were good for cacti and succulents, in fact my snake plants bloomed for the first time. But that environment would NOT have been appreciated by Citrus. Yes, depends on specific situation, but balconies in general, offer special challenges to most plants,