Cold Stratification

Stratifying in a refrigerator typically refers to the process of cold stratifying seeds. Cold stratification is a technique used to simulate winter conditions and break seed dormancy, which encourages germination. Here's what you need to know:

What seeds need stratification?

Many trees, shrubs, and wildflowers native to temperate climates have seeds that require cold stratification to germinate.

How to stratify seeds in a refrigerator:

1. Prepare the seeds:

   • Remove any wings or fleshy coatings from the seeds.
   • Soak the seeds in water for 24-48 hours (depending on the specific seed requirements).

1. Choose a moist medium:

   • You can use damp paper towels, sand, peat moss, or vermiculite.
   • Make sure the medium is moist but not soggy.

1. Place the seeds in the medium:

   • For small seeds, spread them out on a damp paper towel.
   • For larger seeds, mix them into the damp medium.

1. Seal the container:

   • Place the seeds and medium in a sealed plastic bag or container.
   • Poke a few small holes in the bag for air circulation.

1. Refrigerate:

   • Place the sealed container in the back of your refrigerator, where the temperature is coldest (around 35-40°F).
   • The stratification period varies depending on the seed type, but it is typically 4-12 weeks.

1. Monitor the seeds:

   • Check the seeds periodically to ensure they are staying moist.
   • If the paper towels or medium dry out, add more water.

1. Plant the seeds:

   • Once the stratification period is complete, you can plant the seeds in pots or outdoors (depending on the season and climate).

Tips:

• Label the container with the type of seeds and the start date of stratification.

• Check your seed packet for specific stratification instructions, as the requirements can vary.

• Don't let the seeds freeze in the refrigerator.

• Not all seeds require stratification. Be sure to research the specific needs of the seeds you are planting.