Why Choose the Mushroom Popcorn Kernels by Princeton Popcorn? As a First Generation Farmer, Farmer Bob has cultivated high-quality popcorn grown on his farm in Kansas. Our mushroom popcorn kernels are responsibly grown with the utmost care using non-GMO seed. The brand's philosophy is one of the clean labels and back-to-the-basics good food. Quality starts in the field and that is why Farmer Bob plants the seeds, raises the crop, and harvests. After that, he cleans and conditions the popcorn before packaging it in all USA-made packaging materials. This popcorn is grown by Farmer Bob with his, One Farmer, One Field philosophy so you'll know where your popcorn comes from. Princeton Popcorn is truly Seed-to-Store.