Mine are growing here in very southern new mexico arid region, and all are flowering. It's very interesting! The ones I shared with others are reportedly blooming, as well.
It's been an exceptionally hot May. We are also in the short day latitude, and that could also be the case. I haven't been growing them long
enough this far south (previously was in north), so I don't know if this is normal for them in short day or hot areas.
Thanks for posting this, I'm very curious as to other's results.