Two winters needed
Sometimes I get no germination after winter sowing wildflower seeds, and dump the soil from the container on an inactive compost pile. This can lead to surprises the next summer.... so far this year I have seen a clump of Monarda fistulosa spring up from that pile and now Brown-eyed Susan is in full bloom on that same pile. Another composite is in bud but not yet blooming - I wonder what I will be! It seems that some seeds need two winters, or that my stratification is inadequate that first winter.