Santa Rosa plum pic
I planted this Santa Rosa as a whip in January 2010, and this is the second year it has fruited like this. The picture doesn't really do it justice, because this is just one side of the tree: and the other side is just as full.
Although SR is self fruitful, it will set much more fruit, if it is cross pollinated by another variety that blooms at the same time. Mine is pollinated by AU Rubrum ( also self fruitful), which has set even more fruit than SR, because of the cross pollintion from Santa Rosa. I've already harvested 83 lbs of plums from Rubrum and still have more to go.