Over the years I have tried many ways of keeping veg going in the winter. It was hard at the old site as it was in a frost pocket. Between 2003 and 2013 the temperature dropped to at least -10C every year with one year it was -17C.
Looking though photographs I found some images of winter lettuce from 2010. I trialled three different varieties, Ayr, Valdor and Winter Density, all sown on 23 September, so I am thinking it is not too late to try some in the new garden, maybe with fewer weeds this time!
They will need protection, last time I made some ‘solar pods’ as described in the book “Solar Gardening: Growing Vegetables Year-round the American Intensive Way” (1994.)
It is available here at Google Books.
The ‘pods’ are for raised beds with the ends made of marine plywood and covered in twin wall polycarbonate sheet. I will make smaller versions this time, enough to cover half a bed, one metre square.