It's been ten long years (and 9+ failed attempts) for me to get a gardenia to grow, much less bloom This year, I finally FINALLY managed to win my bet, thanks to re-potting in organic acid-rich soil (and no thanks to Aqua Globes)!
Like some of you advised, the Aqua Globes actually backfired on me: it kept the gardenia too wet in the roots and the buds began dropping like crazy. So, after ditching the globes, repotting the plant in some high quality acidic soil, the gardenia began perking up considerably. I'd water it every other day (or so), and let the water drain out completely at the bottom. During the really hot days, I'd mist it in the afternoons. And now? It's blooming thanks to all of your suggestions!