Look like sprouting Cauliflower. Do you know the named variety? What is the weather like? Real hot? Real wet?

You can eat the stems now, it is not going to go back to "normal" at this point. Heck, since they are growing like that, maybe they will grow more if you cut them like Broccoli. Doesn't hurt to try, unless you want the space for something else.

Not much you can do for those heads at this point. It was most likely an environmental issue like too much heat at the wrong time. It is curious that one head formed fine. Unlike broccoli, caluiflower won't put out side shoots after the main head is harvested. I'm not sure what the loose heads taste like.

I would try and eat them. I bet they are spicy!

Not certain of the root of the problem but those weeds need to go.

Thanks everyone. I'll try harvesting the weird shoots and see how that goes. Once I clear the weeds out, I'll try again with new plants.

I'll try again with new plants.

You didn't tell us where you were located but I wouldn't try cauliflower during the heat of the summer as it would be bound to failure. Here in the heartland I set out my fall cauliflower transplants in early August and harvest in late October to early November. I start the plants from seed indoors about a month earlier.

I don't know the history of those plants, BUT getting them in the ground as soon as possible is important...long before they are stunted.

At the local farmers market today, they were selling sprouted cauliflower for $6/pound. Looked a lot like yours.