Maybe not patented, but most commercially grown crops come from proprietary seeds. Hybrids are made from two plants, and the offspring is not the same. So you

Maybe not patented, but most commercially grown crops come from proprietary seeds. Hybrids are made from two plants, and the offspring is not the same. So you need to keep buying new seeds each season. Those two plants that are selected are the secret. Some tomato seeds cost more than 10x their weight in gold. I watched a good documentary on YouTube about it earlier this year, but I can't find it now :/