ok so all of my seeds have been stratifying a bit more than 4 weeks. i have S. minor D. filiformis ssp filiformis and D. californica. i took 2 seeds out about a week agao to test them to see if they would germinate.... they all already have mold on them and they are turning to mush. what can i do to stop the mold? can i just keep them in the fridge until spring?