St. Emilion is California's traditional name for Ugni Blanc, also known as Trebbiano, a neutral, high-yielding white grape long used in the state for brandy production rather than table wine. California's numbers show a long decline: bearing acreage has fallen from 375 acres in 2000 to 92 acres in the latest report, spread across 12 counties, and no UC Davis Foundation Plant Services registry entry exists for it under this name. It survives mainly as a brandy-industry grape, valued for high acid and neutral flavor rather than as a wine varietal in its own right.
What kind of grape this is
- Species
- VITIS VINIFERA LINNÉ SUBSP. SATIVA (DE CANDOLLE) HEGI
- Berry color
- ROSE
- Country of origin
- ITALY
Registries
What is published
Counts describe what this atlas holds for St. Emilion, not what California grows. A zero is a published answer: it means the source names the grape and reports nothing under it, or does not name it at all.
- 141
county-years of acreage
12 counties, 92 bearing acres in 2025
- 104
district-years of crush
12 of 17 crush districts, 26 crop years
- 104
district-years of Brix
tonnage-weighted at the crusher, Crush Report Table 3
- 0
producers in this atlas
producers whose curated wine list names it — a curated roster of 2,772 producers, not a census of California
- —
regions with a maturity date
not one of the eight cultivars with a
Acreage in California
loading acreage…
Counties and concentration
loading concentration…
Where it is planted
Reported by county — never by AVA
loading plantings…
Share of each county's vineyard
Reported by county — never by AVA
loading county shares…
The counties
Reported by county — never by AVA
loading counties…
Tonnage and price by district
Reported by crush district — never by county or AVA
All 12 districts on one axis →
loading crush report…
Brix at the crusher
Reported by crush district — never by county or AVA
loading must chemistry…