Hi Marguerite, Ironically as it may seem, the "Vidalia" onion starts in Texas and is transplanted in Georgia. I will argue that the 1015y onion developed by Texas A&M is superior to the Vidalia onion. It seems that in either case there is no magic soil and climate, as long as the horticultural requirements for onions are met. I think that it is more important to plant the right variety, ie, short or long day, that is suitable for your area. Onions do better in sandy, or loamy soil than in heavy clay soil. Happy Gardening, Allen Bastrop Co., SE Central Tx. Marguerite wrote: > In some information I have read, claims are made indicating that it is > the soil where the Vidalia onions are grown that is responsible for the > sweet mild taste. I am wondering if there is some element that can be > added to soils in Missouri (in my case), or Iowa, or any other state, > that would result in near duplication of the soil conditions where > Vidalia onions are grown so successfully. If any list member has tried > to duplicate those soil conditions, would you share your experience, and > your successes, or other results? > Thank you. > Marguerite Ruch, on the shore of Truman Lake in Missouri