I have 2 large Romeo dwarf Cherry Trees and a Carmine Jewel dwarf Cherry planted in a row. They have been there for several years. Each year they are loaded with blossoms, but the Romeos basically set zero fruit and the Carmine sets a handful.
Since these are suppose to be self pollinating, what else could be the problem? It's so disappointing to see them loaded with blooms each year and never get fruit.