Question: I have read two different points of view on the use of railroad ties to edge raised beds. I have read you shouldn't use them, and I recently read that it is fine if the ties are old, but you shouldn't if they are new. What do you think?

Answer: Some forms of creosote and/or components of creosote are known human carcinogens, so contact with the compound is not recommended. Aged ties are less likely to have volatile components that can irritate the lungs and mucous membranes, but you should wear gloves and long-sleeved shirts to prevent skin contact. However, there are so many other options for edging beds, from including stone, brick, concrete, and plastic, that you might consider these options instead.