Rhubarb will be most productive (and tasty and less acidic) if it's being
well fed. Mulch and/or manures work for that. My best success has been along
garden deer fences, which idea was from a garden at Linnea Farm (the deer
don't eat it, so put it on the edge) it changes the usual weedy seedy edge
to productive. There are other species too, including the Chinese medicinal
one (Rheum palmatum -is that it? or R. p. Tanguticum?) Forest garden
plantings work fine.