Excited to see try these as I love blueberry! This is a cross of F13 and blueberry F4 (60% dominant sativa).
Seeds sat in glass of water for a day, then I placed them in wet paper towel on a covered plate, on a heatmat.
Seeds sprouted the next day. I let them grow a bit more then planted into a plastic cup filled with Coco and little bit of perlite. Used cloning gel and added some mykos.
You don't want to give any nutrients this early seedlings get there nutrients from inside the seed has everything it needs just water until about 2 weeks old is all you need