Ok, I have seen NUMEROUS people complain of germination problems with Sour Crack seeds lately. I germed 4/4 that were 2+ years old recently. They are all up. That being said, with that many people having the same issues with germination, it could be a different bat h of seeds. Mine were from 2017 Black Friday and did fine. So, I popped those and ran out. I just started 2 Blue Cush seeds last night. But those are freebies. I ordered more Sour Crack and White Crack. Just to prove or disprove this "problem" I will start soaking a Sour Crack seed right now. If I have an issue, something is truely wrong. If it germs, then it is user error for those who have failed. I will start soaking a seed tonight. I soak for 24hours and directly plant, without a tail. Some open within 24 hrs...some don't. Either way, they go into Coco. Lightly covered with a dome and temps 80-85f. It will be above ground in 2-3 days max. I will go grab a cup of water and start now. Once it is up, I will post a pic. I have faith, it is not the seeds. I have only had 1Mephisto Strain not germ. White Train. They were small and immature looking. Other than that, I have 50 Sour Blues I just germed 4...they are 3 years old easily. That being said, some strains do have harder shells....often INDICA based. The h2o2 is a good idea, if you have troubles. I don't, but actually I will do a side by side. I will do 2 Sour Crack seeds right now. 1 Soaking in RO water only for 24 hrs and 1 Soaking in diluted h2o2 water for 24 hrs. I like Doing experiments and this will prove weather or not it is the seeds or user error. I have germed Hundreds of seeds. Sour Crack germ test begins...NOW! I will share info through out the next few days and pics. Peace, slow