I think that Piennolo del Vesuvio is such a new endemic species, which is tied to a specific area around Vesuvius (weather and soil), which is not found elsewhere. Nowhere I have not read that somewhere else than in nearby Vesuvius someone managed to make Piennola and keep them until spring. For these tomatoes, I became a member of the Italian website Agraria and nobody from other regions in Italy was growing Piennolo successful. This also confirmed me Eugenio, the main website moderator (who lives in the region Vesuvio DOP).
Vladimír
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