Tina - Sorry. I misunderstood what you were asking. When I used to get a number of open-pollination from insects/hummingbirds ... I'd guess about 10-15% rate. Not high, but enough to notice some of the plants were producing pods/seeds. And I would venture to say that the viability of those seeds were about 95%. That was before I started hand-pollinating them myself for hybridizing purposes. When I did it, the success rate was much higher. Probably 90-95%.
