A lack of iron can affect the growth of bean plants, according to Colorado State University Extension. Iron deficiency causes yellow leaves with dark green veins. The plants' shoots may die back, and the beans may become discolored, according to Primal Seeds.
About this Author
Aileen Clarkson has been an award-winning editor and reporter for more than 20 years, earning three awards from the Society of Professional Journalists. She has worked for several newspapers, including "The Washington Post" and "The Charlotte Observer." Clarkson earned a Bachelor of Arts in journalism from the University of Florida.