Trebbiano Giallo

Trebbiano Giallo is the Trebbiano that actually belongs to Lazio, and the one the wines of Frascati, Marino and the Colli Albani were historically built on. The Trebbiano Toscano everyone now associates with those wines is a recent arrival and not native to the region at all. Almost everything else about the variety is disputed.

Origins and history The true Trebbiano Giallo is historically tied to the Castelli Romani, where it is also called Trebbiano Giallo di Velletri and, incorrectly, Greco Giallo. It takes its name from the golden hue the berries reach at full ripeness. Acerbi was the first to describe that golden look, in 1825, and also noted correctly that the variety was anything but a generous producer, which is worth holding onto.

A century of confusion Molon began the trouble in 1906 by treating Greco Giallo and Trebbiano Giallo as identical. Prosperi compounded it in 1939 by declaring Rossetto, a variety of the Montefiascone countryside, a synonym, on the belief that Trebbiano Giallo’s golden berries turn pinkish-red when fully ripe. Growers in the Castelli Romani and Cori say their Trebbiano Giallo does no such thing, so Prosperi most likely confused two grapes. The National Registry nonetheless still lists them as synonymous.

The Roscetto problem Matters worsened when Riccardo Cotarella began making a very successful wine from a local variety called Roscetto, also known as Rossetto and, inevitably, as Trebbiano Giallo, so that all three names are now used interchangeably. Cotarella argues his grape is not a Trebbiano at all but a Greco, since it looks and behaves like one and gives a tannic, polyphenol-rich wine. DNA work says otherwise: Roscetto is neither Greco nor Greco Bianco. What is reasonably clear is that Trebbiano Giallo and Rossetto are not the same variety.

Not Trebbiano di Spagna either Trebbiano Giallo was once identified with Trebbiano di Spagna, which is incorrect. That variety is properly Trebbianina, long considered at best a blending grape for traditional balsamic vinegar in Emilia-Romagna. Its cuneiform leaves and long, winged, pyramidal bunches with medium-small berries look nothing like Trebbiano Giallo, nor like the Registry’s own description of it.

In the vineyard Trebbiano Giallo has large pentagonal leaves and medium to large cylindrical-conical bunches, with medium round berries that turn yellow-gold at full ripeness and are dotted with brown flecks. There are no recognised clones, but at least three biotypes have been described in old Lazio vineyards, distinguished by bunch and wing size, and some describe a fourth. One of these may yet prove related to the Grecos or to Roscetto.

Appearance and structure The variety gives a white of more substance than Trebbiano Toscano, with the golden fruit character the name implies and enough acidity to carry it. The Registry calls it an abundant and regular producer, which flatly contradicts both Acerbi and the growers who work with it, and is one more sign that the entry describes something other than the Castelli Romani grape.

Aromatic profile Ripe yellow fruit and a faintly waxy, honeyed character define it, with citrus underneath and a mineral finish on the volcanic soils of the Castelli Romani. It is not aromatic in the Muscat sense and was never meant to be. The interest lies in texture and depth rather than perfume.

In the cellar The variety appears across the Lazio appellations, in Frascati, Marino, Colli Albani and the Castelli Romani DOCs, and the 2011 rewriting of the Frascati rules explicitly allows it among the permitted varieties alongside Malvasia del Lazio. It is also grown in Umbria, Lombardy’s Garda Colli Mantovani, the Veneto and Puglia, though what goes by the name in those places may not always be the same grape.

Key expressions

• Castelli Romani whites where the historic Lazio Trebbiano is named.
• Frascati and Frascati Cannellino made under the revised rules.
• Old-vine parcels around Velletri and Cori carrying the distinct biotypes.
• Varietal IGT bottlings from growers who separate it from Trebbiano Toscano.

The question of aging Trebbiano Giallo holds three to five years well, gaining a waxy, honeyed depth while the acidity keeps it upright, and the better examples from low-yielding old vines go longer. It is more durable than Trebbiano Toscano by a clear margin. Overcropped, it collapses within a year like any other Trebbiano.

At the table Its weight and acidity suit the Roman table: abbacchio, artichokes, fried salt cod, pecorino romano and pasta with rich sauces. It stands up to food that would flatten a lighter white. Serve it around ten to twelve degrees.

Why it matters Lazio had its own Trebbiano, better than the Tuscan one, and replaced it with an import while keeping the name. Untangling Trebbiano Giallo from Greco Giallo, Rossetto, Roscetto and Trebbianina is still unfinished work that will need proper ampelography and DNA to settle. The grape is a reminder that a region can lose its identity through paperwork as easily as through planting.