A wet season has a lot to do with it, as that leaches nutrients out of the soil and BS’s are HEAVY feeders!
Mine did fantastic this season - best I’ve ever grown, BUT I had fresh composted tilled in at the start of the season, they were watered enough, but not too much, because we remain in drought conditions. I boosted them twice with straight nitrogen, via Blood Meal applied at the roots and watered in.
Here are the basics for growing great Brussels Sprouts:
https://www.gardeningchannel.com/brussels-sprouts-not-forming/
That sounds like it.
Thanks.
I think that maybe I’ll just pull them up. Seems like I can’t get them to overwinter.