I don't know what variety it is, but it looks as if it will grow on for a few more days. Keep an eye on it, and if it's going to be sunny fold the outer leaves over the forming curd. You will need to snap the stem of the leaf then tuck enough of them around the curd to keep it covered until it's ready. This will help to stop it going brown if we have strong sunshine. Looks like a lovely cauli though. Enjoy!!
