How can a wine maintain its style from one vintage to the next?

An illustrative situation. A buyer selects a Malbec for its expressive fruit, medium body and restrained oak. It goes into the portfolio and the sales team learns to sell it. Months later, when a reorder is due and the next vintage becomes available, the question is no longer only what it costs or how much is available: they need to know whether the new wine will hold the characteristics that made them choose the last one.

That question connects the winemaker's work to a concrete commercial need: giving continuity to what the importer, the salesperson and the consumer expect to find.

Worth setting the scope before going further. This applies to programmes that need commercial continuity. Some wines are attractive precisely because they express what was particular about each vintage, and there variation is not a problem to solve but the proposition itself.

Three commitments that get confused

Before discussing method, three things the commercial conversation tends to merge need separating, because each calls for different controls and different agreements.

• Maintaining a consistent style. That the wine remains recognisable as the same product: fruit, body, oak, the impression the consumer associates with that label.
• Maintaining the agreed quality standard. That the wine meets the level committed to. A wine can improve in quality and move away from the agreed style, which for a brand is still a problem.
• Securing supply. That volume is available when a reorder is due, within the expected lead times.

A supplier can meet two of the three and still put the programme at risk. Best to agree them separately.

What changes from one vintage to the next

Every growing season is different, and recent data helps put that in proportion.

Argentina's Instituto Nacional de Vitivinicultura reported roughly 1.84 million metric tonnes of grapes harvested in 2026 (18,391,299 quintals), 8% less than in 2025. The same statement rated grape health and winemaking quality as excellent, and highlighted very good polyphenolic maturity.

SourceINV, 2026 harvest, statement of 19 May 2026

These two observations sit together: a smaller harvest alongside a favourable assessment of its quality. The statement does not establish a sensory comparison between the two vintages, but it shows why harvested volume should not be used as a substitute for a quality assessment. Nor does it allow conclusions about any particular winery's availability, which is confirmed with the supplier.

The mechanism behind those differences is set out in the technical literature. The Australian Wine Research Institute explains how soil, water, temperature and other site conditions influence ripening processes and rates, and recommends recording developmental stages and weather events for each season.

SourceAWRI, Site factors influencing berry ripening processes and rates of ripening

From which follows a simple idea with practical consequences: knowing a plot is not knowing what it yields, but understanding how it responds in different years. That accumulated knowledge is what allows variation to be anticipated, not removed.

Define the style before trying to repeat it

A shared definition makes assessing later vintages considerably easier.

"Premium Malbec" or "good quality" do not describe the wine a client wants to preserve. Without a shared definition, comparing across harvests becomes an argument about impressions.

These are the four attributes we assess across vintages.

To define the profile more precisely, buyer and supplier can also agree references for freshness, sweetness and characteristics to be avoided. Setting out what would fall outside the profile helps sharpen the acceptance criteria.

Two wines can share the same alcohol level and have different stylistic profiles. Meeting a number does not demonstrate the profile has held.

The AWRI distinguishes between dimensions of ripeness and explains that aromatic maturity does not necessarily coincide with sugar maturity, while linking the definition of ripeness to the style of wine being sought.

SourceAWRI, Defining berry ripeness

Continuity starts in the vineyard

Maintaining a consistent profile is not a cellar operation that happens at the end. It rests on accumulated information and on decisions taken well before.

• Knowing the origin. Which plots the fruit comes from and how each behaves.
• Following the season. Recording how the year develops, so harvest arrives with judgement rather than surprise.
• Deciding when to pick. Assessing timing against the profile sought, not against a calendar date.
• Comparing the lots. Reviewing what is available before deciding which wine goes to the programme.

At Corbeau that work includes decisions on pruning, soil management, irrigation and picking date. They are not a fixed recipe and do not always produce the same effect: they are the variables available when a year turns out differently.

There is also an underlying condition worth stating plainly. Preserving the vineyard is what makes continued production possible. A commercial programme needs a recognisable profile, and it also needs a vineyard that is still viable twenty years from now.

Samples turn a profile into a verifiable reference

A retained sample adds a physical reference to the written profile. Its value increases when it is identified and can be linked to the lot, the date and the corresponding records.

We retain three kinds of reference, and each documents something different.

These references allow the agreed profile to be compared against documented lots and shipments. If a difference appears, they provide evidence for investigating it, alongside the production, storage and transport records.

When moving to a new vintage, we send samples before shipments begin if the client requests them. That is the moment when there is still room to discuss.

One necessary caveat: a retained sample evolves. Its identification, its date and its storage conditions matter when interpreting any comparison. It is not a fixed sensory standard, and treating it as one leads to the wrong conclusions.

Assessing the new vintage

On receiving a sample from the next vintage, three separate questions are worth asking, because they are not interchangeable.

• Is any difference perceptible? A question of detection. The answer can be yes without that being a problem.
• Is one of the samples preferred? A question of taste. Legitimate, and it settles nothing on its own.
• Does the new sample meet the agreed profile? The decisive question for accepting the new vintage into the programme.

A wine can be preferred and still sit outside the style set for the programme.

As good practice, assessment works best in comparable conditions, with samples coded and their identity kept in the record, a first evaluation done blind, and observations written down before they are discussed. The AWRI recommends tasting blind, serving constant volumes and temperatures, and preventing tasters from influencing one another before each records a judgement.

SourceAWRI, Practical sensory evaluation considerations

The assessment method and the number of tasters should suit the purpose of the test. The wine's acceptance criteria are defined with the buyer for each programme.

Planning the transition between vintages

Even a carefully assessed vintage transition can disrupt supply if it is not planned in time. The buyer has to coordinate stock, rate of sale, sample assessment and reorder lead time.

A hypothetical example shows why the calendar matters. A programme sells 10,000 bottles a month. If the full lead time from approval to having saleable product is four months, it needs to cover 40,000 bottles across that period. Adding a further month of cover takes the figure to 50,000.

10,000 × (4 + 1) = 50,000 bottles

An illustrative example, not an inventory recommendation. The real calculation has to account for orders in transit and variations in demand.

That lead time starts after approval. Preparing, shipping and assessing samples therefore has to begin far enough ahead to agree adjustments before the reorder becomes urgent.

Five agreements before moving to a new vintage

All of the above comes down to five things worth settling with the supplier.

• Which characteristics define the profile. The attributes that keep the wine recognisably the same product.
• Which documentation and samples serve as reference. What is retained, under what identification and for how long.
• How the new proposal gets assessed. Under what conditions, with which questions and with what record.
• Who communicates and accepts changes. Named responsibilities and agreed timing, not a generic procedure.
• How the transition is coordinated with shipments. What lead times sit between approval and actual availability.

For the buyer, continuity becomes verifiable when the profile is defined, the references are identified and the transition is discussed in advance. That work makes it possible to assess each new vintage against shared criteria.