Interesting. So you are saying there are three cultivars of Big Jim? I did not see ‘Big Jim Legacy’ listed as having been released by New Mexico State University? Do you know who selected this variety? Or is it just a renamed version of Big Jim that happened once the new heritage cultivar was re-released? Having seen a lot of varities be randomly renamed by people i would assume the latter, but i don’t know anything about this one.
What climate do you garden in?
Interesting observations. Perhaps you do indeed have one that has adapted to grow better in your climate. That is not a trivial trait to have. Makes me now wonder which i should trial.