Anyone know of a pollenizer for this type of Elderberry?
Will Sambucas Negras work??
Seemingly isolated elderberry bushes often fruit well. Elder pollen travels in wind, if you want to enhance prospects planting a grouping of unrelated (seed-raised) blue elders might be the best approach.
Note spellings are Sambucus mexicana and S. nigra. S. mexicana is blue elderberry.