Where can you buy and how do you grow your own soy plants?!
Answers: Thanks for information! I'd like to grow some and try to make some food out of the harvest.
Go to a seed dealer, in a farming community and ask for some soybean seeds. It takes a lot of room to grow a small amount of them. I don't know how many you want. They come in 50# bags. If you only want a few ask if they have a torn bag you can get a few out of.
Plant the seed in the spring after the danger of frost is past.