Oscar Mulberry is a wonderful variety to grow as it is edible in the red stage when they have a raspberry like flavor, or in the black stage when they are among the finest flavored of the hardy mulberries. Oscars Mulberry is very early ripening.Oscar Mulberry is a wonderful variety to grow as it is edible in the red stage when they have a raspberry like flavor, or in the black stage when they are among the finest flavored of the hardy mulberries. Oscars Mulberry is very early ripening.