Perhaps. But upon re-reading it it seems to suggest using aromatic crops, perhaps as a border crop. Why it suggests potatoes as aromatic I don't know. Do potatoes produce smelly flowers or leaves?
This is what I'm getting out of the book...
All members of the cabbage family are heavy feeders and like a rich soil (rich meaning manured). They also crave calcium (lime). Potatoes on the other hand dislike limed soil. And while the book states that the fragrance of potatoes (and other aromatic crops) helps, it doesn't state to plant potatoes next to cabbage. (In fact, it states under the "Potatoes" section, that potatoes dislike lime). It appears as one of those overlooked things while she wrote the book (easy enough to do).
That's the way I'm taking it. So perhaps planting potatoes around but not next to cabbages works well, to keep whatever causes clubroot from getting to the cabbage.
Great catch! Thanks for pointing that out.
Jim Carlock Post replies to the group.