Likes decreasing temperatures and day lengths,
and tends to bolt if temp or light increases.
So, Nappa is possible as a spring crop if you plant very early,
but is much easier in the fall. Delicious fall salad green, very juicy and mild, for soups, steaming, stir-fry, and making kim-chee.
Brassica oleracea var. capitata / C/Matures 9-16/Harvest 2-4/Yield 96-383/Sp 15-18”