Wine Arcana

Grape

Pedro Ximénez

Also known as PX

Pedro Ximénez is a white Vitis vinifera grape most closely associated with Andalusia, especially the inland Montilla-Moriles appellation in Córdoba and, to a lesser extent, Jerez in Cádiz. It can make dry white wine and contributes to the dry, biologically aged wines of Montilla-Moriles. Its defining role, however, is as the raw material for the very sweet wines also called Pedro Ximénez, commonly shortened to PX.

Those wines begin with ripe bunches dried after harvest. Removing water concentrates sugar and acid before pressing, so the resulting must is far more concentrated than one from fresh grapes. Fermentation is then stopped or prevented by the addition of grape spirit, leaving grape-derived sweetness; oxidative ageing may add further colour and savoury complexity. Its dense texture and dried-fruit character arise from post-harvest drying and cellar work as well as the variety itself.

A name that needs care

Pedro Ximénez is a Spanish white wine grape, documented in the Madrid regional grape collection as a distinct, characterized Vitis vinifera accession.1. Comunidad de Madrid, “Pedro Ximénez,” Colección de Vid, accession ESP080-BGVCAM0852. The origin of its name and the stories often offered to explain it are much less secure. No direct evidence establishes an origin in a particular country or a known historical namesake.

Spelling is consequential here. Pedro Giménez, the Argentine white criolla variety, is not Pedro Ximénez. A microsatellite study found the two to be different cultivars and found no genetic relationship between them in the markers examined; it instead supported Pedro Giménez as offspring of Muscat of Alexandria and Criolla Chica.2. M. F. Durán, C. B. Agüero & L. E. Martínez, “Assessing the identity of the variety ‘Pedro Giménez’ grown in Argentina through the use of microsatellite markers,” Revista de la Facultad de Ciencias Agrarias 43, no. 2 (2011): 193–202. A label or planting record therefore needs its place and genetic identity, not just a near-identical name.

On a label, Pedro Ximénez may name a naturally sweet fortified wine under a regional appellation as well as the grape. Pedro Ximénez can also be made dry: Montilla-Moriles permits it in unaged and aged white wines, as well as in its Fino style. The legal category and production method explain the finished wine.

Drying grapes for sweetness

In the traditional asoleo process, growers lay sound harvested bunches in the sun. Water evaporates while sugar, acid, skin material, and other dissolved components become more concentrated. This is drying, or raisining, rather than the concentration caused by Botrytis cinerea in a botrytized sweet wine. Its practical success depends on ripe, healthy fruit and dry enough weather to avoid damaging the berries before pressing.

Montilla-Moriles defines asoleo as post-harvest sun exposure on gently sloping ground, designed to dehydrate the berries while preserving their skins and sanitary condition. Its current specification requires PX sweet wine to be made from at least 95% Pedro Ximénez; the dried-grape must must contain at least 450 grams of sugar per litre.3. Junta de Andalucía, current Pliego de Condiciones de la Denominación de Origen «Montilla-Moriles», sections C.1 and C.6.

After pressing, the concentrated must is fortified early enough that much of its sugar remains. Some Montilla-Moriles PX is sold without ageing; other lots age oxidatively in cask, either as a vintage wine or through fractional criaderas y solera blending. Oxidative maturation darkens the wine and can move it beyond fresh-grape notes toward raisin, caramelized, roasted, or coffee-like impressions. Duration, cask history, oxygen exposure, strength, and the starting fruit all affect the balance.

Montilla-Moriles and Jerez

Montilla-Moriles is the principal inland Andalusian home of Pedro Ximénez. Its vineyards occupy the rolling country south of Córdoba, where the protected zone includes Montilla and Moriles as well as neighbouring municipalities. The grape is central enough to the appellation that it supplies both dry and sweet styles; warm growing conditions can help fruit accumulate the sugar needed for the dried-grape route, but the sweet wine remains the result of a deliberate post-harvest process.3. Junta de Andalucía, current Pliego de Condiciones de la Denominación de Origen «Montilla-Moriles», sections C.1 and C.6.

In Jerez, Palomino Fino is the main grape for the region's dry wines. Pedro Ximénez is authorized there for the naturally sweet category explained in Sherry, but is a much smaller local planting. The Jerez specification requires a wine sold as Pedro Ximénez to use at least 85% must from raisined grapes of that variety and to age oxidatively.4. Junta de Andalucía, current Pliego de Condiciones de la Denominación de Origen Protegida «Jerez-Xérès-Sherry», sections B.1 and H.3. It also allows fortified raisined PX must from Montilla-Moriles when it is unavailable from the Jerez production area. That provision helps explain why a Jerez PX name can encompass fruit grown in Montilla-Moriles.

The two regional versions resemble one another because both build sweetness from concentrated Pedro Ximénez must and commonly use oxidative maturation. Their legal definitions differ: Montilla-Moriles sets a 95% threshold for the grape, while Jerez sets 85%; each appellation also has its own permitted methods and ageing options. In either place, the deeper colour and more developed character of an old example are partly the work of time in cask.

Sources