The Polar air is hanging around. It is -20C/-4F this morning, and the wind makes it feel like -30C/-22F. I ordered four packets of seeds on-line from Stokes Seeds a few days ago: 'Alfresco' lettuce mix, 'Jade Princess' ornamental millet, 'Tinker Bell' mini red pepper, and 'Healing Waters' pelleted Petunia & Bacopa mix. Stokes has sent an e-mail to tell me my order was shipped yesterday. Will my seeds still be viable after they have been frozen to -20C?