I'm going on memory, but I believe Grandma Roberts came from "Fusion Power" Dar Jones. It was his Grandma's.
Yes, that bean entered seed saving circles via Dar, who traded it with many on Gardenweb. I grew it in 2014, it was a very productive bean... one of the better purple-podded beans I've tried. Blue Marbutt (also from Fusion) was very productive too; firmer, better flavored pods, but not fully purple.
Alas, my list of beans (and incidentally, everything else) has been pared way down, to only a few "must grows" (Annette, you already know what the beans are). I injured my foot, and will be recovering from surgery until sometime in July. So my rural plot - where I grow most of my seed crops - will be fallow this year.
The silver lining is that I will be able to focus on eliminating some of the weed pressure which has increased over the last few years, and do some major work on that garden (later in Summer) to increase its drainage. Until then, though, I will be putting a lot of seed into the freezer, to preserve it for better days.
