Sow indoors in flats with good potting soil February through August. Transplant into the garden about 3-4 weeks after sprouting. May also be direct sown. A good choice for early spring or autumn gardens in our area.
Collect seeds when dry from 50 or more plants (to avoid inbreeding). Dance on seed stalks on a tarp to thresh. Collect seeds and winnow to clean. Isolate from other Brassicas of the same species, oleracea (collards, brussels sprouts, broccoli, some kales) by ½ mile.