IS YOUR CORN FIELD GREEN, YELLOW, OR PURPLE? Posted on June 6, 2018June 6, 2018 by Paul Benson With the rainfall and warm temperatures corn leaves have a few different colors showing up. Here is a quick reference article. https://agcrops.osu.edu/newsletter/corn-newsletter/2018-16/early-corn-coloration-%E2%80%93-green-purple-or-yellow