Posted: 12/09/2016 at 20:00
tree paeonies, eryngiums, aconitums, lots of umbellifers (or whatever we call them now) and ranunculaceae, primula, the sooner and fresher the better. Arisaemas, roscoeas, roses, I've has rosa rugosa flowering a year after an autumn sowing
Some will germinate very quickly if they're fresh, others will germinate in spring. None of then need heat and some will be inhibited by heat.