Blue Berry not flowering

As long you see pistil. Just let her go some autos are big. And the gene pool not all are identical you get different pheno type some will flower in the breeders suggested time line(perfect grow/environment) an then some go a little further. Ether way can’t lose. Now if you don’t see any pistil an only the spike looking leafs most like won’t flower.

It would seem that the blue berry is a photoperiod, meaning it'll need the 12/12 schedule to flower. If you're in NA, it'll take some time to start flowering unless you implement a control such as light deprivation cloth.

Only way is light dep. you going to give her unnatural darkness?

So, a a lot of things going on here. First it looks like you’ve already got some bud rot on that white widow. Secondly, I suspect that your blueberry is actually leaning more of a photoperiod than an auto. Meaning it will require less light ( a 12/12 schedule) to start her flowering. Without using artificial lights you will either have to wait for nature to do her thing- or move her someplace with a few hours less light. I’m curious to know if you are running and fans to circulate the air in the greenhouse?