It is not safe to use railroad ties, as they are typically treated with creosote to preserve them, which can leach into your vegetable garden's soil. Creosote is made up of up to 10,000 chemicals, according to Garden Simply. It can cause various maladies, such as skin irritations, internal pain and cancer, according to the U.S. Agency for Toxic Substances and Disease Registry.
About this Author
Josh Duvauchelle is an editor and journalist with more than 10 years' experience. His work has appeared in various magazines, including "Honolulu Magazine," which has more paid subscribers than any other magazine in Hawaii. He graduated with honors from Trinity Western University, holding a Bachelor of Arts in professional communications, and earned a certificate in applied leadership and public affairs from the Laurentian Leadership Centre.