Mine is nw facing, unheated, and I love it!
Only mived in 18 months ago, so still figuring out what does well and what doesnt. I bought most of my plants from the "about to die" section of local garden centre, cuttings from friends etc. We only use ours in spring to end of autumn, so Im not too fussed about it looking great in the winter. I did want a properly jungley planted feel, so want plants that will have plenty height.
Banana plants - go for more interesting ones than musa basjoo. Theyre fast growing, easy going, and though they start to look sad by late winter theyre worth it and recover v quickly.
Tree dahlias - fast growing screening, great for proper height whilst you wait for everything else to catch up. Buy tubers now (farmer gracey have them...).
Fatsia japonica - tough as old boots, boring but jungly - my plan is for it to be planted into the garden when it gets too big.
Passionflower - get a fancier type, let it clamber about overhead. Flowers v exotic, will fruit, fast growing.
Mimosa - pretty foliage, amazing flowers just as it gets warm enough to sit in there.
Gloriosa
Annuals like black eyed susie to scramble around.
Hate:
Colocassia / giant yam - The leaves drip onto the floor. Not that hardy for the winter.
Lime - hates the temperature changed, prone to aphids.
Abutillon - aphid paradise, just never looks happy!
Cacti- do very well, flower etc but too small, too bitty, too spikey. My DD collects them though.