onion seeds allium cepa

Asked January 16, 2019, 6:47 PM EST

I would like to know the seed moisture content for onion seeds, that a seed vault uses for storage. Will only be storing them for 2 or3 years. Can't find anything definitive on the net. Cannot cryopreserve but store at 0" F.

Appreciate the help.

Kent Carnell

Dixon County Nebraska

1 Response

Hi Kent,
This information comes from Knott's Handbook for Vegetable Growers.

Storage of Vegetable Seeds in Hermetically Sealed Containers
Seeds stored in sealed containers should not exceed these moisture percentages on a wet weight basis. Onion - 6.5%

Estimated Maximum Safe Seed-Moisture Contents For Storage for 1 Year at Different Temperatures

  • 40-50 degrees F, 11%
  • 70 degrees F, 8%
  • 80 degrees F, 6%
Relative Life Expectancy of Vegetable Seeds Stored Under Favorable Conditions
Onion - 1 year