I agree, DD, that planting using acidic rhubarb leaves against club root defies all logic. I have a couple of leftover, sturdy cabbage plants that I'm going to plant in the area that I know is rife with club root, wrapping their rootballs in rhubarb leaves. I just need to know if it was pure luck when I used them before, or if, indeed for some strange reason, it does offer some protection.