Seedman Blueberry Fem HPS

First post here on RIU. Wanted to document my current grow. Two Seedman Seeds Blueberry Feminized freebies that came with an order. 3 gallon pots with 50/50 mix of a local soil mix and perlite. Being fed with General Hydroponics three part and Botanicare cal-mag. 600watt HPS turned down to 300watt mode. Home made scrog net in a 5'x5'x5' grow tent with two oscellating fans and a 165cfm 4" inline fan. Vegged for 8 weeks then switched lights to 12/12 on January 4th 2018. So today is day 14 of flower.

First 2 pictures are after 3 weeks veg.
Second picture is on day 1 of flower.

Here a shot from today day 14 and they have stretched a good 6 inches above the trellis. Clusters of pistils are forming at the bud sites.

Day 24 of 12/12. The stretch has stopped and buds are starting to develop.

I did a seedsman BB last year. She was disappointing in quality for what I was looking for but I have super high standards for blueberry. Mine was kind of a runt compared to the others I was running but she had a good smell and could have been better if I gave her more attention. Hope yours comes out better than mine did, cheers.

Day 31. Just flushed plants 3 days ago due to what I believed to be N lockout. Had high ppm salts built up in medium, flushed till I had same ppm coming out that I was putting in. Plants have reacted positively to the flush so I will feed at 3/4 strength next feeding.

So what happened? Did you get popped or did it die or something?