Cold Moist Stratification of Milkweed Seeds
By Brad Grimm at Grow Milkweed Plants
Cold Moist Stratification (CMS) describes the process that seeds naturally progress through. Timing of the process occurs naturally when the seed is dispersed from the milkweed plant in the fall and continues until the seed begins to grow in the spring. The process I am presenting for CMS is designed to simulate winter conditions and can be applied to the milkweed seed at any time of the year in your home.
Planting milkweed seed between Thanksgiving and Christmas is my favorite. It's nice to get the seeds in the dirt before the snow arrives. Casting milkweed seed over the snow leaves them exposed to become the food for small animals.
Repeat success indicates that the process works!
Since February for the showy milkweed and May for the woollypod milkweed was to late in the year to winter sow I used the method described above. All and all it worked out great! By August the woollypod milkweed plants were beginning to look like real milkweed.
As summer became fall the temperatures outside began to cool off. The sun set a bit lower in the sky and the woollypod milkweed went dormant along with all the other plants. It's December 2017 now and the woollypod milkweed is completely dormant. I have been storing them in the garage for the winter. Hopefully in March of 2018 I will be bring them out to enjoy the warmer weather.
Brad Grimm at GrowMilkweedPlants.com
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