Return on your seeds

How far apart are you planting your kohl rabi? I grow 4 to a square foot, so six inches apart. They grow quite vertically and don't take up much horizontal space so are good for planting around the edges of beds. I love the crunch of kohl rabi in a salad, good for when radish and turnips aren't around.

I have about  8 plants 8" apart in a row covered in mesh to stop pests, when should they start bulbing? At the rate these are going it'll be winter before they do anything, they're a healthy 10" tall on stalks so far. I still don't think they're going to be a favourite,  I'm not keen on radish or turnip, so there's not a lot of hope for kohl rabi. Good to experiment though.