Geertson also explained that alfalfa is particularly prone to contamination because it is a perennial plant (a plant that lives for more than 2 years) that can be cross pollinated by insects that travel long distances and alfalfa seeds can lie dormant in the ground for 10 to 20 years. Unlike corn, cotton and soybeans that are annuals and do not grow as feral plants in the environment and need to be planted each year, alfalfa is a perennial. Therefore, alfalfa will be permanently contaminated.
Continue reading about The Seedier Side of Alfalfa Contamination