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We often expect a favourite food product to taste exactly the same each time we buy it. Consistency feels reassuring, particularly when we have found something we enjoy.

Exceptional extra virgin olive oil is different.

Like wine, it begins with fresh fruit grown outdoors. The olives respond to rainfall, heat, wind, sunlight and the rhythm of the seasons. Even when the same trees are cared for by the same producer, no two harvests are entirely identical.

That natural variation is not necessarily a flaw. It can be one of the clearest signs that an olive oil remains connected to the land from which it came.

Olive oil is an agricultural product

An olive grove is not a factory. Every growing season presents the producer with a different set of conditions.

A warm, dry year may place the trees under greater stress. A cooler season can slow ripening. Rainfall may arrive at an ideal moment, too late to influence the fruit or in quantities that make harvesting more difficult.

These conditions affect the development of the olives and, in turn, the oil’s aroma, bitterness, pungency and texture.

One harvest might produce an especially intense oil with prominent green flavours. The following year, the same cultivar from the same grove may feel more aromatic, rounded or delicate.

The identity remains, but its expression changes.

The producer must respond to the season

Great olive oil is not made by following an unchanging calendar.

The producer must watch the fruit carefully and decide when each grove is ready to harvest. Picking too early may limit the amount of oil produced. Waiting too long can reduce freshness and structure.

Weather can narrow the available harvest window even further. If heavy rain is expected, a producer may need to act quickly. If different areas of the grove ripen at different speeds, the harvest may be organised in several stages.

These decisions influence both quality and flavour.

The best producers do not try to force every season into the same mould. They adapt their approach to preserve the finest expression available from that particular crop.

Does variation mean inconsistency?

There is an important difference between natural variation and poor quality.

A well-made oil should still be fresh, clean and free from sensory defects. Its fruitiness should feel clear, while its bitterness and pungency should sit naturally within the overall structure.

What may change is the emphasis.

An oil known for green tomato aromas may show more herbs in another year. Its bitterness might become slightly firmer, or its pepperiness may arrive more gradually. The texture may feel broader or more precise.

These are nuances rather than failures.

Indeed, absolute uniformity can sometimes require large-scale blending across different growing areas or harvests. That approach may produce predictability, but it can also remove the individual character that makes a small-production oil interesting.

Should we call it a vintage?

Olive oil does not have an established vintage culture in quite the same way as wine, but the harvest year still matters.

Extra virgin olive oil is at its most expressive when it is fresh. Unlike many wines, it is not intended to improve through years of ageing. Its green aromas and vibrant flavours gradually become quieter over time.

The harvest date therefore tells you both when the olives were picked and where the oil sits in its natural life.

It is worth remembering that a fresher oil is not automatically more suitable for every person or dish. Newly milled oils can be particularly vivid, bitter and peppery. As the oil settles, its profile may become more integrated.

The aim is not to keep olive oil indefinitely. It is to enjoy it while its character remains alive.

Tasting a new harvest

When opening a new harvest of an oil you already know, try not to search only for an exact copy of the previous bottle.

Instead, look for the family resemblance.

You might recognise its characteristic aroma, the shape of its bitterness or the way its pepperiness develops. Then notice what the new season has added or changed.

This is one of the pleasures of returning to a trusted producer. You begin to understand not only a particular oil, but also how the grove responds from one year to the next.

Consistency of values, not uniformity of flavour

For me, the most meaningful consistency is found in the producer’s standards.

Are the olives healthy and harvested with care? Are they milled quickly? Is the oil protected from heat, light and oxygen? Does the producer taste critically and refuse to release oil that does not meet the required standard?

Those commitments can remain constant even when nature changes the precise flavour of the harvest.

Exceptional olive oil is not a fixed recipe. It is a record of a season, shaped by the land and refined through human judgement.

When each harvest tastes slightly different, the bottle is reminding us that the oil came from living trees – not from a production line.