Grow(Brassica oleracea var. viridis)If possible keep soil temperature over 75°F until germination, reducing air temperature to 60 °F. Prefers outdoor temps 60 °F- 70 °F.
They can be grown in mild winters above 32°F where hardened-off seedlings can be set out from September to February. If starting indoors, brassicas need to be transplanted before their fifth true leaf, so not to become rootbound.