What is stratification? Stratification is artificially overcoming a seed's dormancy by placing it in layers of moisture-retaining media (paper towel, potting soil, etc.) and keeping it under generally cool and moist conditions for a period of time. This will simulate winter conditions, according to the Garden Web Glossary of Botanical Terms (
GardenWeb - The Internet's Garden Community).
Some seeds need it to grow (hollyhock, columbine) some seeds it will kill. Not sure about Marijuana, I'll have to read around and see. I keep my columbine seeds in a baggie in the butter compartment of the fridge.