Lots of issues with that species here, both for a nice harvest (cabbage worms, drought, heat) and seeds (don’t survive winter as mature plants) so I forgot about cabbage, broccoli, brussels sprouts, collards and made “broccil-ish” Broccil-ish thread. We’ve been eating it for two or three weeks, harvest will continue until the weather warms up enough for the worms to arrive and the flavor to decline, at which point it will trimmed back a bit and left for seed…
I put a lot of varieties in the initial mix and didn’t specifically record them, but I do recall January King was in there and I think it was one of the main ones to survive the first winter along with a few other cabbages and some brussels sprouts.