Rhubarb has many companion plants. The genus "Brassica"; including Turnips, Cabbage, Kohlrabi, Brussels Sprouts, Mustard, and Rape (The ...Read Moreseed used to make Canola Oil), is one good companion plant. They just grow better together. They protect beans from black flies. They repel red spider mites which can hurt Columbines. Their poisonous foliage (Oxalic acid containing) when infused with water is believed to be effective at preventing black spots on roses, and an aphicide.
Rhubarb has many companion plants. The genus "Brassica"; including Turnips, Cabbage, Kohlrabi, Brussels Sprouts, Mustard, and Rape (The ...Read More