The Norden variety belongs to the butterhead lettuce group. It is officially classified as a breeding variety and is included in European plant registers.
In an agronomic context, the variety is intended for cultivation under glass in protected ground during the autumn-winter period. In DUS test technical protocols, Norden is used as a reference variety, with the color of its outer leaves described as grey-green.
Sources2
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Countries of admission
1 jurisdiction
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.
Variety registered as early as 1
jurisdiction,
data for which we do not publish: their registry licenses have not yet been verified. This section will be available upon verification.
Variety in registries
Regions of admission, rights holders, and status of plant breeders' rights
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