Hi Ge,
Wintersowing is a term for sowing OUTDOORS in the WINTER and it is great for those of us who run out of room in the house to start sowing seeds in Feb and Mar. The seeds go into containers with potting soil that you thoroughly soak. The containers have vent holes in the tops and at the bottom. Then you just place the containers outside and wait until spring to see what's grown. I get about 80% germination at different times during early and late spring. I think they have a forum for WINTERSOWING here. It's so convenient because of the space that it DOESN'T take up in the house and the fact that you don't need to watch the temperature and watering every day!!
What do you think about this method? Would you give it a try?