The important thing to remember about blueberry is that she is really sensitive to over ferting. Keep your cf between 1.5 and 1.8, and the ph around 5.6
She is a leggy bitch as well - don't overveg her, or she will take over your grow cupboard.
What I would suggest doing is grow the seeds up into mother plants, and chuck away any males - then take clones from the most promising one and use those for your grow.
Its a fiddly strain is blueberry - she can mutate, and behaves in all sorts of strange ways - she takes a long time to root from clones, and does not like extremes of temperature.
However she is worth it. A good blueberry is one of the nicest smokes you can get

To get the colour out of her, just drop the temps in your growroom down a bit when you are in 12/12 - at around 60 degrees at night is when she shows her colours properly

Just keep an eye on your nutes, ph and temperature and you should be OK mate.
Good luck
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