Table of Contents
What seeds need to freeze to germinate?
What Seeds Require Cold Treatment?
Should you put seeds in the freezer before planting?
Freeze seeds for 48 hours before germinating to stratify them. This is not necessary for all seeds, but we have used this technique for over 30 years with great success. When finished, seal and leave any extra seed in your freezer – they will keep better.
How do you freeze seeds for germination?
Try freezing seeds inside an ice cube for a fast stratification. Don't freeze seed just in a package unless it has a thick coat or the moisture content is low, because water in the embryo cells can burst when frozen. But encasing it in ice protects the seed from freezing damage.
Can garden seeds be frozen?
As long as your seeds have been able to dry completely, they can freeze without a lot of damage. Since changes of temperature are gradual outdoors, there is less danger of condensation, and winter air tends to keep the seeds dry anyway. The important thing is make sure that the place stays dry.