Mystery Blueberry seeds‍♂️

Hey folks, hope someone can help, don’t know if I’m taking the right steps here. Bought some seeds online, Mystery Bluebrrry, thinking it was a strain, turns out they were mixed Auto and Photos. Planted six, 2 auto 4 photos, autos are finished this week and now need to start the photos. They’ve been vegging all this time stripping as I go, done some last too on them so lots of bud sites coming now! Dropped the lights (Mars hydro TS1000w)to 12/12 about 2 weeks now, still no pistils or flowering signs, possible slight light leak? Anyway, was gonna attempt 3 days dark, which would help also with drying autos I am finishing. Will 3 days dark kick start the end of summer for these plants ?? Need to get them flowering as I have my next seeds on germ now, I run a tight ship here lads....thanks in advance....Eaf

Pics?

One in the muddles almost ready, one next to it is same age

Those are the autos in bloom? And the photos next to them in veg?

Those plants need 2-3 more weeks to finish. I bet if you look at the nodes on the photos you see pistils or pollen sacs.

2 or 3 weeks?? Trichome are getting milky in places.

Those autos definitely have a couple weeks left to go. You’ll be left with crap airy buds if you harvest them any sooner.

The 3 days of dark MIGHT help the photos start flowering. It really depends on if they are actually mature and have proper grow conditions. It can take photos 14+ days some times to actually begin flowering if they aren’t fully mature or if the environment is out of wack. I’ve had fully mature healthy clones that normally took 5-7 days take over 3 weeks because of a cold snap a few years ago.

Edit: the last picture does look more mature then the first picture from over head. The over head picture appears like the plant is still covered in white stigma, which is why we feel it needs longer.

Also looking at the node spacing and growth on the photo plants, it appears they are right on the verge of beginning to flower.

Planted both on 29th October, using bat mix and bio bizz bloom and top max never more than 2ml per litre each. Just struggling right now to keep temp good at night. Lowest this week was 17 degrees centigrade it’s cold here

Hard to tell on my phone but it looks like a pistil on the 3rd node down from the top.

Update*
The photos seem to be starting to bloom now, gave them a “strip before the flip” I think the term is lol, but all seems to be going the right direction, they have been about 9 weeks vegging now and a bit of lst pinching , have to say, enjoying working with photos, slightly more challenging, but hey learning loads this time!! Thanks for the advice folks you were bang on the money

n update on the photos: lots of really nice bud sites, but I think things aren’t as fast as last time.....this is week 2 of flowering.......what should I give them? At the moment they get bio bizz bloom and top max and cal mag once a week.....
Would putting them on 18/6 now that they are flowering be an option? Gradually???
.cheers in advance
Art