Should You Fertilize Your Lawn? By Dan Gill • Mar 30, 2013 ShareTwitter Facebook Google+ Email The last week of March is ideal for fertilizing lawns in South Louisiana, but how do you know if you should fertilize? Listen Listening... / Copyright 2013 WRKF-FM. To see more, visit http://www.wrkf.org. Tags: home & garden Related Content Pollen, Pollen Everywhere 2 years ago Termite Protection and Gardens Don't Mix 2 years ago View the discussion thread.