The Nirvana top44 I had most popped, but that's all they did, except for 1 seedling, so 9 out of 10 were duds. I wont be ordering any more top44 from nirvana, Much of the orders from the uk are this way, I have found, I believe they must be getting x-rayed at customs. I have never had any problems ever growing out any other bag seed ect. It also could be because there old seeds or have been frozen.