Hello. I've started a lot of seeds over the years and my theory is: It all about the moisture inside the seed and how old it is. 8% moisture (inside the seed) is near the line of starting or not starting for most cannabis and hemp seeds. this is why some people pre soak their seeds. I put my seeds away in small air tight seed vials as soon as I get them. We don't know how old the seeds are we get, or what type of environment they sat in for that time. Seeds that are left out are only good for the next year. you get 2 years if they are put away well. It goes downhill from here to 10 years where all but the strongest will sprout. The freezer works well if it is below -20c, you can get 20 years. I find Hydrogen Peroxide helps. Just a drop or two in the water before you soak your paper towels will help. Good Luck. Chuck.