Growing winter vegetables - my new project

[MrBig46]

I was in the garden yesterday. It's still raining, there's mud everywhere, so I just opened the cauliflower cover and took a picture. I also downloaded the temperatures measured over the last twenty days to my computer. Only four nights were cold, the minimum temperature was -5.4 ° C. The plants look a bit different than in the previous photos. They didn't grow much, only the drawing on their leaves is more pronounced. I don't know if it's right or missing something them. According to forecasts, the real winter will not start until after the Christmas holidays. All I have to do is wait, watch it and hope it works out.
Vladimír