Red wine grape · Vitis vinifera
A red wine grape from Portugal, documented in both the French cultivar reference and UC Davis's Portuguese selection records.
Plantgrape describes Touriga nacional as originally from Portugal. UC Davis FPS independently lists Portugal as its country of origin and includes Touriga and Touriga Fina in its synonym record. Plantgrape's lack of officially recognized EU synonyms is a separate regulatory statement, not a contradiction of historical naming.
Plantgrape describes moderate vigor, a semi-erect bearing and a need for training, and cautions against very shallow soils. These source-attributed descriptions do not supply a minimum soil depth or establish suitability at any particular vineyard.
UC Davis FPS records Portuguese material imported in 1981 for use as a port variety. A selection's documented introduction history is distinct from current availability, a universal wine style or proven performance in a new region.
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 variety record used to cross-check cultivar identity and naming. 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.