Packera aurea winter sowing sucked?

Hey,

Does anyone have experience winter sowing P. aurea? Collected wild seeds last summer from multiple friends and kept them in ziplocs in my crisper drawer. Sowed 40 jugs around end of December. So far maybe 2 seedlings. Watered jugs regularly so never dried out. I am in 7b and jugs are in part shade. Thanks for any input!