AK 47 AUTO SEEDS

I am growing AK 47 Cannabis seeds, which was a gift from the Netherlands 3 years ago, for the 4th time. In all our other experiences, flowering had started in the 3rd week, at the latest, in the 4th week. but this time same seeds, same conditions and climate but they have finished 8 weeks and flowering has not started! PLEASE HELP ME!!! Again, these girls showed signs of flowering in their 4th week.they stop with the first signs of flowering. Daha çiçeklenmeye başlamadan önce 8 haftayı da tamamladığı için üç gün önce 12 saat karanlık 12 saat aydınlık ışık döngüsüne aldım. It seems as if they were under little encouragement. White pistils have also increased very, very little.Since the end of the 4th week I have been giving a flowering fertilizer. Your comments and suggestions are very valuable to me. Finally, I would like to add that the seeds were stored in the dark and in the refrigerator for 3 years.