Grape varieties

Petit Verdot: paid like Merlot, held to a much lower bar

Ontario pays exactly the same $2,614 a tonne for Petit Verdot as it does for Merlot. To put an appellation on a Merlot the fruit must reach 20.5° Brix; for Petit Verdot the figure is 18.0°. That two-and-a-half-degree gap is the widest the regulation leaves between two grapes the price schedule treats as equals.

The same class, different rules

Class 10d of the 2026 Grape Growers of Ontario schedule reads "Merlot, Petit Verdot" at $2,614 a tonne. It is a Bordeaux grouping and a sensible one: both are left-bank varieties, both ripen late, both want the warmest ground Ontario has.

Appendix A of Ontario Regulation 406/00 treats them quite differently. Merlot has its own line at 19.0° Brix provincially and 20.5° for an appellation wine — the highest figure in the whole appendix. Petit Verdot has no line at all, so it falls under "Other vitis vinifera varieties" at 17.0° and 18.0°, the lowest figures the appendix sets.

The asymmetry is not a judgement about the grapes. It is an artefact of how the appendix is built: about twenty varieties are named individually and everything else falls into a residual category calibrated to accommodate everything from Aligoté to Tannat. A variety small enough to escape a named line inherits the most permissive rule in the table — and Petit Verdot, which in practice ripens later than Merlot and would struggle at 20.5°, is a direct beneficiary.

What it is for

Petit Verdot is a blending variety almost everywhere it is grown, and Ontario is no exception. In Bordeaux it goes into a blend in small proportions — often under five per cent — to add colour, firm tannin and a violet-tinged aromatic lift that the other varieties do not supply. It is deeply pigmented, late-ripening and structurally severe on its own.

That role fits the Ontario market well, because blends are where most of the province's serious red wine actually lives. Red blends accounted for about $13.1 million of VQA table wine sales in 2023 and Cabernet Merlot a further $5.6 million — together more than the varietal figure for every red in the province combined. A grape whose job is to improve a blend does not need its own shelf presence, and Petit Verdot does not have one: it does not appear in the reported varietal sales table, and it does not reach the published top twenty by acreage.

The ripening problem it shares with its class partner

Petit Verdot's difficulty in Ontario is the same one that confines Cabernet Sauvignon to the warmest sites, only more so: it ripens later than any of the Bordeaux varieties, and in a cool year it simply does not get there. Under-ripe Petit Verdot is aggressively tannic and green, which is a worse fault in a grape whose entire purpose is to add structure to something else.

In practice that restricts it to the Niagara River and Four Mile Creek sub-appellations, the warm plain around Niagara-on-the-Lake, and the Lake Erie North Shore, and even there it is planted in small blocks by wineries with a specific blend in mind rather than sold on the open grape market. The climate page covers the heat accumulation that decides whether a late red ripens here at all.

The name, and what it promises

"Petit Verdot" means small green one, and both halves are a warning. The berries are small, which gives the high skin-to-juice ratio behind the colour and tannin it contributes. The green refers to how it behaves when it fails to ripen — and in Bordeaux, its home, it failed often enough that plantings fell steadily through the twentieth century before warmer vintages revived it.

For Ontario that history is the relevant one. A variety that was marginal in Bordeaux on ripeness grounds is being grown several hundred kilometres further north, and the province's warmest sites are cooler than the Médoc's. That it works here at all is a fair measure of how much the Niagara River and Four Mile Creek sub-appellations differ from the rest of the province.

Reading the price class correctly

It would be easy to conclude from class 10d that Ontario values Petit Verdot as highly as Merlot. What the schedule actually says is that the two cost about the same to produce and occupy the same band of wine — the board prices production economics, not market outcomes. The same logic puts Pinot Gris, the province's best-selling white, in the same class as Pinot Blanc, which barely registers. The statistics page covers this kind of over-reading in more detail.