Very productive, Red Winter lettuce is also slow to go to seed and exceptionally hardy. Sowing at the end of summer would allow you to harvest plants until spring, even in our latitudes! An Internet user from Michigan claims to have kept some in the garden all winter and the lettuces picked in January were as good as those from October; she only had to clear the snow to harvest them! The plants left in place eventually reseed and lettuce production becomes continuous.
Number of days for harvest: Young leaves: 28 | Mature leaves: 60