This is a very weak selfer. You will often find 1 or 2 seeds in a pod. I've crossed it many times and I always get 1 or 2 seeds, the same as I get when I don't cross. However, I did once find a seed pod at the top that I didn't cross that was full of seeds. This has an extended stigma that is easy to cross with, but probably makes it hard to self without a pollinator.
This is a good tree hugger and will almost take full sun.