They are two different plants. Blaue Ballerina (aka Blue Ballerina) was bred by Paul Goetz in 1989. Ballerina Blau (aka Ballerina Blue) was bred by Wolfram Goetz in 1985.
Both were registered under their German names, so I have edited our entries to give the German names pride of place and I have listed the English names as also-sold-as names.
