Hi & welcome to Gardenweb. Does your balcony have a roof?

Succulents are the stars of the full-sun show, Sedums, Crassulas, Kalanchoes, Senecios. I make a 'wall of foliage' to make our porch more private too. Hanging pots at varying heights helps, as well as some floor plants coming up to meet the bottoms of the higher ones. Like Cannas, basil, rosemary, jasmine, Gardenia, and upright versions from the genuses mentioned for hanging plants too.

Moonflower vine has bigger leaves, might do more for ya.' Scented night-blooming flowers too.

Hi, the balcony does have a roof.

Thank you for the suggestions! I'm wary of using upright plants because I have very limited floor space.

Hanging plants would be more ideal, so thanks for the ones you recommended. I'm thinking Senecios will be my best option because they seem to be the only ones capable of covering lots of vertical space.

I would want to hang these Senecios 'over' my balcony, which means the entire plant will be exposed to many hours of sun. Will these conditions be okay?

I'm having trouble picturing what you mean? Like lantern hooks sticking out from the sides? If you could add a pic or two to this discussion, more specific advice could be possible about arranging things. Full sun plants don't care if they're hanging or in a regular pot. And don't limit yourself to the length of the hanging arms that come with a pot. You can use steel wire to make them as long as you want, though any increase in length increases the distance wind can blow pots sideways, so may not be practical near a railing, post, or where people are sitting.

It sounds like you could use some pots with holes in the sides. Then you don't have to wait for plants to spill all the way over the edge, down the sides, eventually dangling below. You could cut holes in plastic pots you already have or get one already that style, like {{gwi:4397}}, or this, or {{gwi:4398}}, or this. (Holy cow, how did I not encounter this last site before? I have a hero and didn't even know it!!)

I thought so many of the pics in this search were inspirational too. Hanging pots are what I prefer for anything reasonable to put in one. The wind doesn't knock these over! Probably a concern of yours also.