That is pretty normal having snow in December. Well, i have flowering house plants on windowsill by looking at snow.

Your snowplants look pretty good. Don't touch the deformed one, it will be all right too. If you used fertilizer or high nutrient soil, that is the reason probably. I had 2 like that and they're pretty normal now. Check my log, you'll see there.
Mine were because of over fertilizing. They were latest seedlings so they got more water than any others and all the fertilizers were collected by soil. This what i believe, till now no one said opposite.

Good luck with them. :thumbsup: