I purchased a 50# bag of Buckwheat seed from our feed store. On the label it just said common variety. It is an actual crop seed but I planted it as a food plot. It was .75 cents a pound.When you say buckwheat what plant do you mean? There are dozens of native varieties, as well as food crops. I know that in California, plants in the genus Eriogonum are very important insect food sources.