Red wine grape · Vitis vinifera
The cultivar known as Zinfandel in California is genetically linked to Italy's Primitivo and Croatia's Crljenak kaštelanski / Tribidrag.
Plantgrape's Primitivo profile recognizes Zinfandel and Crljenak kastelanski as synonyms. UC Davis FPS reports genetic analysis linking California Zinfandel, Italian Primitivo and Croatian Crljenak kaštelanski / Tribidrag to the same DNA profile.
Plantgrape reports that grape maturity can be irregular in its Primitivo description. This does not establish that every regional selection behaves identically, or prescribe a harvest strategy.
The Plantgrape entry is specifically titled Primitivo; the UC Davis chapter focuses on California Zinfandel and its identity history. Cultivar identity does not establish identical performance across regional selections.
Reference review · November 9, 2026
INRAE / IFV cultivar reference. Vine-trait observations belong to this reference's context; they are not universal planting or irrigation recommendations.
Independent institutional history used to cross-check cultivar identity and geographic context. It does not independently validate every agronomic observation in Plantgrape.
Cultivar descriptions are source-attributed reference material, not site prescriptions. No numeric soil-moisture threshold, disease diagnosis, regional suitability guarantee or GroundWorx performance claim is established here.