I sure hope this weather lasts - this is either the 3rd or 4th time this year - lots of buds out there - i picked 20 blooms tonite - the kitchen smells so good!
I have gardenia variety "Le-WalMart-2.5-Franc-Speciale" which has bloomed all summer for the last 2 or 3 years. It would have 5-10 blooms every week. This year the bushes had gotten so large I heavily pruned them. I have still had a few blooms throughout the summer.
Mine have a HUGE flush in the spring, and then sometimes have a BIG flush again - but even if not a big flush - i'll get 10-20 blooms at a time, off and on. I still have new blooms on them - and new ones pending. But, I have no clue as to the name of the bushes - they all came from my mother - to my knowledge she never knew the name either.
here is a pic of one of them
Here is a link that might be useful: One of my gardenias in bloom