Stratification is when a seed is moistened, chilled or frozen and thawed, breaking down germination inhibitors on the seed coat, such as waxes, hormones, oils or heavy coats. Plant milkweed — it’s the sole food source for monarch caterpillars and is attractive to many pollinators for its nectar-rich flowers. Do I need to keep them in the refrigerator or since they are already stratified can they be kept at room temp until I plant them in 3 or 4 months? Leave this pod alone to scatter seed in the wind. To optimize the germination of the seeds, shock them or rough up the exterior coating.Scarification-- breaking down the outer coating of the seeds -- can help improve the milkweed's germination rate.Place the stratified seeds in a jar or a container with a lid, along with 1/4 cup or so of coarse sand. If you wanted to plant now, you could put chicken wire over the area and remove when it gets colder….good luck!