Now I know this may be crazy, but brussel sprouts (indeed all brassicas) take up alot of space for a long time. I have 60 or 70 large clay pots stored at the back of the garage doing nothing year after year. Could I (It's a big ask!) Could I pop the Brussels in a Large Clay pot of ordinary soil (so nice and firm) ,and grow them on in a group lining the veg plot instead of in it?? Playing with this idea as I really need to free up space, and I have grown potatoes really successfully in pots before. I could fleece wrap the pots in winter to avoid cracking. Any thoughts?