Rioja DOCa: Terroir, Viticulture, and Aging Rules

Q: Why does Rioja traditionally use American oak?

Due to historical trade routes with America in the 19th century, American oak was cheaper and more readily available than French oak. Moreover, the sweet wood tones and soft tannins of American oak complement the acidity and structure of the Tempranillo grape well.

Q: What type of glass is used for aged Rioja?

Use a large Bordeaux glass. The tapered opening concentrates the tertiary aromas (such as leather, tobacco, and spices) and directs the wine to the back of the tongue, balancing the present tannins and acidity.

Aug 24, 2026 Door: Roel Timmermans

Rioja DOCa Specifications

Component	Facts
Classification	Denominación de Origen Calificada (DOCa)
Location	Ebro Valley (Northern Spain)
Climate	Temperate continental with varying Atlantic and Mediterranean influence
Red grapes	Tempranillo (88%), Garnacha Tinta, Graciano, Mazuelo, Maturana Tinta
White grapes	Viura (Macabeo), Tempranillo Blanco, Malvasía de Rioja, Garnacha Blanca
Barrel size	Mandatory 225-litre barrica bordelesa

The Three Sub-regions

The area is divided into three zones with different altitudes, microclimates, and soil structures:

Rioja Alta:

Located at an altitude of 400 to 700 metres, south of the Ebro. The combination of Atlantic winds and calcareous clay and alluvial soils produces wines with high acidity and a long ageing potential.
Rioja Alavesa:

Located north of the Ebro in the Basque Country. The vineyards are on terraces with calcareous clay. The wines are typically aromatic, with fresh acidity and a medium body.
Rioja Oriental:

The eastern and lowest part of the area. The climate is warmer and drier (Mediterranean). The iron-rich clay soils are planted with a lot of Garnacha, which yields wines with more alcohol and ripe fruit.

Comparison of the 3 Sub-regions

The Consejo Regulador distinguishes three separate production areas, each with specific climatic and geographical figures:

Specification	Rioja Alta	Rioja Alavesa	Rioja Oriental
Municipalities	77	18	49 (including 8 in Navarre)
Planting (ha vineyard)	27,871 ha	13,178 ha	25,191 ha
Average temperature	-4 °C to 22 °C	-3 °C to 15 °C	-3 °C to 15 °C
Annual rainfall	200 – 400 L/m²	200 – 400 L/m²	200 – 400 L/m²
Soil types	Clay-limestone, iron-rich clay, alluvial	95% Clay-limestone	Iron-rich clay and alluvial
Climate profile	Atlantic profile	Atlantic, protected by Sierra de Cantabria	Mediterranean, drier and warmer

Legal Ageing Requirements (Red)

The Consejo Regulador sets specific requirements for the minimum time in oak barrels and in bottle:

Genérico: No minimum oak ageing required; focus on primary fruit. This will not be indicated on the bottle, however.
Crianza: Minimum 24 months ageing, of which at least 12 months in 225-litre oak barrels.
Reserva: Minimum 36 months ageing, of which at least 12 months in barrel and a minimum of 6 months in bottle.
Gran Reserva: Minimum 60 months ageing, of which at least 24 months in barrel and a minimum of 24 months in bottle.

Oak Ageing and Flavour Profile

The choice of oak largely determines the style of the wine:

American oak (Quercus alba): Traditional in Rioja. The wood has coarser pores and releases pronounced aromas of vanilla, dill, coconut, and cedar wood.
French oak (Quercus petraea): Widely used by modern wineries. The finer wood gives more subtle spice notes (clove, nutmeg) and tighter tannins.

Sources:
Images and specs: https://riojawine.com/

About the author: Roel Timmermans

Roel Timmermans has been with us since May 2025. He is responsible for the day-to-day operations of Perfecte Wijn. With a background at Heineken and EssilorLuxottica, he's also no stranger to e-commerce and online beverage...

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