I bought a pack of Pure Michigan F1 in February from seed bank international. 0 out of 10 seeds popped and one seed was already cracked open. Seems like it was an old pack or not stored properly. I also wish they sealed the packs at the price you're paying so it gives you peace of mind. I contacted the seed bank and they made good on the issue and let me pick another pack and they shipped to me for free. I grabbed their pre 98 bubba kush x Pure Michigan and all 10 seeds popped. I'm more excited for this cross than the PM F1's so we'll see what I get.