What is Sorghum grain you ask? And more specifically, what is Popping Sorghum? Popping Sorghum is known throughout much of the world as Jowar or milo. This gluten free grain is also known as sorghum seed. It is a fascinating and delicious new product (though it’s actually ancient) that pops like popcorn and is completely hulless after popping. The hull is so delicate that it just disintegrates – you’ll never know it was there. See below for more info.