JoAnne Skelly: Companion planting, fact or myth

When I have a question about the validity of a horticultural practice, I check out what Linda Chalker-Scott, horticulture professor with Washington State University, has to say on the topic. When wondering if companion planting was legitimate science, I read her article: “The Myth of Companion Plantings” at https://s3.wp.wsu.edu/uploads/sites/403/2015/03/companion-plantings.pdf. Putting plant companions together supposedly benefits each of them. Do carrots really love tomatoes? Does planting corn, beans and squash together, the “Three Sisters” method of native planting, have a basis in science?