Ziplock bag

Prepare the seeds by soak them 8-24hrs. 

Put seeds into a moistened kitchen towel and put it inside a ziplock bag, keep it in a cold and dark place for your desire period of time. For example: Strawberry takes 2-4weeks when temperature below 75 deg F. For higher temperature, expect longer in seeds germination. It may takes 2 to 3 times longer!