When the temps are right for them to sprout, they will.

Agree that since it is somewhat sheltered so the ground doesn't get snow or freezing rain on it directly then the odds favor at least some of them sprouting. Not that this is an ideal approach but since you don't need the room right now for anything else let them be.

Next time keep in mind that it is soil temps, not air temps, that determine germination. Check the soil temps before planting and save yourself loss work and seeds.

Dave

I think our friends over in the winter sowing forum would think you were playing their game, and I'll bet you will get a good number of plants.

ThinMan

Bah! those seeds will be totally fine. They can all take a frost and come back smiling. The seeds are more resilient than the tender leaves, and in my garden all those things can laugh in the face of frost even after they've germinated. The leaf lettuce in my garden took six or seven hard frosts last spring where it would be frozen solid in the morning, but the warmth of the day would thaw it and it would be delicious and crisp and ready to eat by dinner. I wouldnt worry at all about those seeds.

They may well be fine but as digdirt mentions a lot depends on the conditions in your garden. In a climate like mine ungerminated seeds sitting in cold damp soil generally rot or are eaten by various soil dwelling creatures or foraging birds. But since you can't unsow them I'll keep my fingers crossed for you. My current absolute nemesis is the soil dwelling slug which eats anything attempting to sprout.