You can eat them if you want too. I have used the fruit of an ornamental purple leaved plum for making crumbles and they were fine. But they did need quite a lot of sugar as they are raher sour.

I love those! I eat them right off the tree, too. I've never cooked with them, I usually use my Satsumas for jam and stewing, since they're firmer.
Stephenie

I haven't tried to eat any of the fruits, but I'm wondering if you have had any problem with black fungus, which seems to have infected my ornamental plum tree this year. Any suggestions on how to get rid of the fungus?

We have a flowering plum in our yard for the first time and it is loaded with small plums. Are these eidble like the Santa Rosa plums?

They are really tart. I would not be able to eat them plain, but they make great jelly.

I have 2 ornamental plum trees that I did not plant, the birds planted them. One has green leaves and one red leaves. Each produce a couple of weeks apart and are the size of large cherries. Quite good.