Is it really distinct blooms? Every time I looked at my So for the last two years it was flowering, so I figured that it was just everbearing. At least until it has enough fruit to put its energy into.
I don't think they even need super long growing seasons, though I bet it helps for some late varieties (Winter Delight- Dong maybe). I checked my records from a few years ago and when I grafted Honey Jar, the first green from the growing buds was on June 9th. From which it went on to flower, set, and mature fruit by Early October (a few weeks later than the next year).
Here's what my Honey Jar from EL looks like. It's the same one from the above pic (post #358).
Some jujube grafts are taking their time to wake up as well. I made 19 jujube grafts between 4/29 and 5/1.
The first 5 woke up about 2 weeks ago. Then 9 more a week ago. Just in the last day, I saw 3 more takes, over a month from when I grafted. That brings me to 17/19 (89%), which I'm pretty happy with.
Here's a blurry pic (Edit- pic updated to remove blur...) to give you an idea of how the earlier takes have grown (2 Bok Jo grafts on a Shanxi Li):