Francisco,
thanks for kind comment.
It is first summer, will be first winter for LP. But wood hardening is normal and there should not be major problems if covered good enough... Only one variety from dozen failed to get through 3 winter and was sent to south. This was Grise de Saint Jean (or is known in Ukraine, Nikita botanic garder as Seryj Rannniy).
What important for up north is to avoid return frosts for leaves and breba.
Lives of LP are a bit more sensitive to frost than other varieties and should be opened from winter cover later than other varieties like RDB, MBVS, Svinita, Randino...