RS-9
ActiveVitis L. · Grapevine
UNIVERSITY OF CALIFORNIA KEARNEY AGRICULTURAL CENTER
10 August 2026
Trnjak is an ancient autochthonous variety, historically cultivated in the border regions of Bosnia and Herzegovina and Croatia. It is a wine variety often used for the pollination of the Blatina variety, which has a functionally female flower type.
The variety belongs to the mid-late or late ripening group. Bunches are medium-sized and cylindrical or conical in shape; berries are round, dark blue in color with thick skin. Shoots are characterized by a chaotic growth pattern, which requires a specific approach to vine training.
The plant has good drought tolerance and demonstrates stable but moderate yields. Wines from this variety are characterized by a deep ruby color, high tannin levels, good acidity, and aging potential, including in oak barrels.
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.
The variety is listed in the national registry — its seeds are authorized for sale in this country.
№ Trnjak*HR 1
Records are sourced from official registry publications. Data sources and legal status
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UNIVERSITY OF CALIFORNIA KEARNEY AGRICULTURAL CENTER
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David W.Cain
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Nearby in the species list Trilla K.M.1, Trincadeira Branca B, Trincadeira das Pratas B, Trincadeira Preta, Trincadeira T, Trišljavac, Trišnjavica, Trišnjivica, Tristar, Triunfo T, Troišćina Crvena, Tronto N., Trousseau, Trousseau gris, Trousseau N, Tsaoussi B, Tsapourno N, Tsardana N, Tschaggele N., Tsymlianskyi chornyi