I have a Superior plum, 9 years old, that blooms heavily. My neighbor's wild plums bloom about 10 days later. Hence, little to no pollination. The local nursery has no Kaga, which is usually the recommended pollinator, and the ones it does have were nowhere near blooming. Of course, these trees are bare-root, newly planted in peat pots. That may affect the bloom, or lack of it. Will a new Santa Rosa, 18 feet away, bloom at the same time in future years and provide adequate pollination for the Superior?