I was once told the logic of the freezer thing... Wasn't worth remembering because I buy fem seeds and people say the freezer gives you a better chance of female. As for age, I've had the same seeds for 14 months, not including how ever long the breeders had it (no idea) but I just places them in a little bag in a pill bottle, through it in a box in the garage, 14 months later, boom... Female plants in the yard