Grape varieties

Sauvignon Blanc: the tender white, and where Ontario can put it

Sauvignon Blanc is the least winter-hardy white variety planted in Ontario at any scale. It is also the second best paid. The province's plantings sit almost entirely on the ground warm enough to make that trade worth taking.

Hardiness sets the map

Among the whites grown here in commercial quantity, Sauvignon Blanc is the one most exposed to a hard winter. It is materially more tender than Riesling or Gewürztraminer, and somewhat more so than Chardonnay. That single fact does most of the work in explaining where it is found: the warmer Niagara-on-the-Lake plain, the Niagara River and Four Mile Creek sub-appellations, and the Lake Erie North Shore, which is the warmest viticultural area in the province. It is not a bench grape and it is not a Prince Edward County grape.

The climate page explains why those distinctions matter so much over distances of a few kilometres, and what a grower can and cannot do about winter injury once it has happened. Current bud hardiness through any given winter is published by variety and site by Brock University's VineAlert programme; Sauvignon Blanc is among the varieties it samples.

Well paid, modestly planted

The 2026 Grape Growers of Ontario price schedule puts Sauvignon Blanc in class 9e at $2,420 a tonne, alongside Sémillon — second among whites only to Pinot Gris at $2,522, and above Gewürztraminer, Chardonnay and Riesling. In the Agri-Metrics varietal study covering 2018 to 2022 it ranks tenth in the province by acreage, at the boundary where the top ten varieties account for about 80 per cent of all Ontario vineyard, and its plantings were drifting down at roughly 0.4 per cent a year.

LCBO VQA table wine sales in 2023 came to about $7.0 million, close to 6 per cent of the category and fifth among varietals. On the numbers, Sauvignon Blanc is a solid commercial proposition that is not expanding — which is what one would expect of a variety whose suitable acreage is close to fully used. There is not much unplanted warm ground left in Ontario.

A low ripeness bar for an early-picked grape

Appendix A of Ontario Regulation 406/00 sets varietal Sauvignon Blanc at a minimum average of 17.0° Brix for the provincial designation and 18.0° for an appellation wine — tied with Riesling and Sémillon for the lowest provincial figure in the table, and two full degrees under Chardonnay's appellation threshold.

That is deliberate. Sauvignon Blanc's defining aromatics, the green and herbaceous notes that distinguish it, are at their most expressive before the fruit is fully ripe and fade as sugar accumulates. A high minimum Brix would legislate the variety's character out of the wine. The regulation also records "Fumé Blanc" as an accepted synonym, the traditional name for the barrel-fermented style.

Two styles from the same fruit

Ontario makes Sauvignon Blanc in both directions. The larger share is the unoaked style — picked early, fermented cool, aromatic and sharp. A smaller share goes into barrel, sometimes blended with Sémillon, which is grown here in small quantities and shares the grape's price class. The warmer Lake Erie North Shore sites, which ripen the variety more fully, tend to produce the fuller style by default; the cooler Niagara sites produce the sharper one.

The Sémillon question

Class 9e contains two varieties, Sauvignon Blanc and Sémillon, at the same $2,420 a tonne, and Appendix A gives them adjacent lines — Sauvignon Blanc at 17.0° and 18.0° Brix, Sémillon at 17.0° and 17.0°. The pairing is not arbitrary. In Bordeaux the two are classically blended, Sémillon supplying weight and a waxy texture to Sauvignon Blanc's sharpness, and Ontario growers who plant Sémillon at all generally do so with that blend in mind. It is a very small crop here, below the reporting threshold in both the acreage study and the sales table, and it exists largely as a service to the better-known grape it is priced beside.

A grape whose ceiling is geographic

Most Ontario varieties have room to grow if the market asks for them. Sauvignon Blanc largely does not. Its acreage is limited by the amount of land in the province that is reliably warm enough to carry a tender vinifera through February, and that land is already planted — mostly to red varieties that pay more. A grower on the Niagara River choosing between Sauvignon Blanc at $2,420 and Cabernet Franc at $2,308 or Merlot at $2,614 is making a decision about risk and about what the site does best, not a decision constrained by price. The varieties page sets out how those trade-offs play across the province.