I formed this up after Christmas and poured the two last days of the year. It had been cold and frozen for weeks, putting this concrete work on hold. Luckily it warmed up and I got just a long enough window of about three days to pour and most importantly, cure the concrete. I went to the site New Year’s morning to cover and insulate the wall, it was going to get cold again that day and I didn’t want it to freeze too soon. I covered it with plastic and a lot of straw.