The Preferno variety is mentioned in the official European Union vegetable variety catalogs. In the documentation, it is considered equivalent to the Maikönig variety, also known as May King or Reina de Mayo, which allows it to be classified as a Trocadéro type lettuce.
Detailed morphological and agrotechnical characteristics for the name Preferno are not available in open sources. Since the variety is a synonym for Maikönig, its properties correspond to the characteristics of early-maturing spring lettuces intended for fresh consumption.
Sources3
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Countries of admission
2 jurisdictions
Green indicates countries where the variety is listed in the national catalogue and its seeds are authorized for sale. Expired registrations are marked separately: the variety was previously admitted, but sale is no longer permitted.
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