Blossom of Apple 'Gravenstein', late April. A European heritage apple with disputed origins. Some believe it to date back to the 1600s where it grew at Duke Augustenberg's Castle Graefenstein in Schleswig-Holstein. Others claim that it originated in Italy or South Tyrol and was brough to Denmark in about 1669. Exported to England and to California in the 1820s. Remains popular in the USA and northern Europe, though can be prone to disease.