Prairie Moon: best outside, C 60 days. Mix seeds with equal amounts or more of… sterile media (moist—but not so wet that water will squeeze out of a handful). … Place mixture in a labeled, sealed plastic bag and store in a refrigerator (33–38°F). ... If two months (C(60)) of this cold storage before planting is normally required to break the dormancy of these seeds, one month may work for many species if time is a constraint. … Another method of breaking dormancy for species requiring moist stratification is to sow seeds outdoors in the fall so they may overwinter.

G: Seeds germinate most successfully in cool soil - Sow seeds in late fall (after hard frost) or early spring.