Looking back at my records for the last two years, I've done a handful of diploid self-crosses that yielded about 10-30% pods that led to viable seeds-to-seedlings, depending on cultivar (and your mileage may vary, according to many variables). A pretty good rate for something that is not supposed to happen, I think.
None of mine have bloomed yet, as I don't follow the irrigation/fertilization rates of a commercial garden. But they are all healthy and a good size. I'm looking forward to continuing the process of doing some more self-pollinating dabs each year.
The top half of my potting-bench is almost all self-pollinated dips, with a couple of self-pollinated tets mixed in.
