Natural process whereby seeds are exposed to low temperatures in order to get seeds to germinate. These conditions can also be recreated artificially using a refrigerator or freezer.
is to prechill or expose seed to cold in order to break dormancy, either by refrigeration or by sowing in autumn.
To prepare a seed for planting by soaking in water and then placing in a warm or cold area.
Separation into layers such as what happens when paints are kept mixed. The lighter liquid rises to the top and the pigment sinks to the bottom. With gases and air, the warm rises to the top with the cold sinking to the bottom.