I'm really not sure about that part. But I've never had any luck trying them moistened in the refrigerator. But the only ones I've tried that with were the pink and white dwarf variety and maybe they were just not viable seeds to begin with because I never got a single seed to sprout. With my blue dwarf seeds, I just put the dry seeds in the fridge for 4 to 6 weeks, then planted them normally. It's been a while, but seems to me I got about 50% germination or better from those. Those were either fresh seeds or year old seeds collected from my own plants, so that might make a difference. For what it's worth, I also generally get volunteers from my plants here in the frozen northland, so winter sowing might be another option.