Overwintering Vegetables? I started some veggies from seed surrounded by the late tumble and...

I started some veggies from seed surrounded by the late tumble and there are still green seedling in the middle of winter.
Will they grow when the weather get warmer? Or should I discard them and start trial seedlings when the weather warm?
These are lettuce, spinach and other cold crop seedlings.
What do you contemplate?
Answers:    What I would do is place these near a skylight your lettuce and spinach. Get what you get, if you find nothing at adjectives compost them. Gardening is all in the region of trail and error, Why not try?

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I'd run for new seedling. Older ones have pretty much lost their vigor; unsullied plants will do better.