The crop row just to the left of the center of this screen, were saved by my grandfather Neff in 1985, and were stored in the freezer for 22 years. They came up better than the seeds I just bought from a very well respected seed company this year! There are several varieties, and I plan to use them in my trials, and produce a good size supply of seed from them again. Beans are unlikely to cross pollinate, so it is safe to grow many varieties.