In your climate, yes. In the deep south, no. Au Cherry is really the only self pollinating plum that I know of that’s supposed to be disease resistant enough for our climate. But until the grafts I plan for this spring have been in the ground for a few years, I won’t even know if it can stand the disease pressure in my canker infested location. All the “Asian” hybrids bread for the Deep South except Robusto that I’ve tried succumbed to bacterial stem canker within three years of planting.
So far I have been very limited to growing improved Chickasaws which are expressly not self fertile and often pollen sterile with each other it appears and Mariana. I’m trying Sprite Cherry Plum which looks good and is growing fast but that graft is less than a year old. I’m also trying Marabele grafted into the same Mariana rootstock as Sprite. I plan to graft AU Cherry into the same tree and another onto it’s own Mariana rootstock.
The nursery that I got my mature Mariana from said that they thought that it is self fertile. It is not. Like many interspecific plum hybrids it mostly seems to be fertile with a close relative to one of the parent species that’s not a hybrid such as a European plum which is a close relative to P. caricifera, and Hog plum which is a close relative to the pollen parent, the Munson plum. P. munsonia blooms too late to be a source of pollen for Mariana. It does not appear that a pure P. caricifera can take the disease pressure in my climate, but there are a couple of varieties of it that have done well in the Deep South for others that I’m willing to try as a branch in my multi-variety cherry plum tree. God bless.