I got lazy last fall and just now got out to clear my raised bed for this year's plants. I noticed that several of the stalks/stems from last year's cabbage are sprouting and looking like they are already forming heads. Is this a fluke?. Will they continue to form? One stalk looks like it has 4 heads on it already! We had a really mild winter here in Indiana. They aren't taking up much space, so I guess I'll just leave them but I was wondering if this is normal.