Early Harvest in Grosseto: Why Our Olive Oil Smells of Grass and Has a Peppery Kick in the Throat

Early Harvest in Grosseto: Why Our Olive Oil Smells of Grass and Has a Peppery Kick in the Throat

If you tasted our oil for the first time and it caught in your throat enough to make you cough — that is not a flaw. It is information.

That sensation has a name. Italians call it piccante, and sensory assessors measure it as one of the three positive attributes of extra virgin olive oil. It is caused by polyphenols, especially oleocanthal, and they are present in high concentrations only when the olives are harvested early.

Here is what really happens in a Tuscan olive grove between October and December — and why we chose the more expensive route.

Where our olive oil comes from

Bittergreen olive oil comes from Grosseto — a province in southern Tuscany, in the region known as Maremma. It is a more open, sunnier and less touristy part of Tuscany than Chianti, with gentler terrain and more influence from the sea.

We do not buy olive oil on the commodity market or blend it from multiple sources. We work exclusively with one olive mill. That means we know which groves the oil comes from, when the olives were harvested, and how many hours passed before extraction.

In practice, this matters more than many of the claims you see on packaging. If an oil cannot be traced back to a specific mill and a specific harvest, it is often a blend — and blending usually means someone has optimised for price rather than quality.

What happens to an olive as it ripens

An olive is not a fruit that simply gets “better” for oil as it ripens. As it matures, it becomes more productive — which is not the same thing.

Between September and December, two opposing processes happen at the same time:

Oil yield increases. A green, firm olive contains roughly 12–15% oil. A fully ripe, dark purple olive can contain 20–25%. The same grove can produce considerably more litres at the end of December than at the end of October.

Polyphenols decrease. Their levels peak while the fruit is still green and gradually decline as it ripens. A very ripe olive can contain less than half the polyphenols of a green one.

The aroma changes too. Green olives produce more hexenal compounds — responsible for those notes of freshly cut grass, artichoke and tomato leaf. As the fruit ripens, these compounds decline and softer, fruitier and more buttery notes become more dominant.

So the producer is not choosing between a “good” and a “bad” harvest date. The choice is between more oil and more polyphenols. You cannot maximise both at the same time.

The Jaén index: how ripeness is measured

This decision is not based purely on instinct. There is a scale for it. The Jaén maturity index (índice de madurez) evaluates a sample of olives according to the colour of the skin and flesh, on a scale from 0 to 7:

Our olives are harvested at an index below 3 — typically in the second half of October, depending on the year. That is early harvest in the strict sense of the term, not just as a marketing phrase.

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Three varieties and what each one contributes

Our olive oil is not monovarietal. It is an intentional blend of three classic Tuscan varieties:

Frantoio — 50%
The backbone of Tuscan olive-growing tradition. It brings structure, bitterness and pepperiness, as well as the highest share of polyphenols in the blend. If the oil catches in your throat after swallowing, Frantoio is largely responsible.

Leccino — 30%
Softer, fruitier and less bitter. In the blend, it acts as a counterbalance — without it, the oil could be too aggressive for everyday cooking. Leccino is one of the reasons the oil is not only intense, but also approachable.

Moraiolo — 20%
The most concentrated of the three. It contributes depth, green aromas and additional polyphenol potential. In a larger proportion, it could make the oil too intense; at one fifth of the blend, it adds complexity.

This ratio is deliberate and does not change from one harvest to the next. It is the recipe.

24 hours: the number few producers publish

Once the olives are harvested, the clock starts ticking. As soon as an olive is removed from the tree, enzymatic processes begin — the fruit starts to warm, ferment and oxidise. Every hour matters.

Our olives are extracted within 24 hours of harvesting, using cold mechanical extraction and no solvents.

Why do we mention this? Because it is one of the areas where industrial-scale and more carefully controlled production can differ significantly. Larger mills may collect olives for longer before processing because running the line in smaller batches is less economical. The difference can be noticeable in aroma and free acidity — ours is below 0.3%, compared with the legal maximum of 0.8% for extra virgin olive oil.

What early harvest costs

Early harvesting is more expensive for three reasons, and all three are economic:

Lower yield. You get significantly less oil from the same weight of olives than you would from a late harvest. The difference is not marginal.

A shorter harvest window. Everything has to be picked within a few weeks, which means more labour concentrated into a shorter period.

Harder harvesting. Green olives are more firmly attached to the branches and are more difficult to process.

That is why genuine early-harvest oils are difficult to produce at supermarket commodity prices. It is not simply a matter of marketing — the economics are different.

How to recognise early-harvest oil from any producer

Not just ours. If you want to know whether an olive oil really comes from an early harvest, look for:

• The harvest date on the label, not just the best-before date. October or early November usually indicates an early harvest.

• Named olive varieties. If the producer does not state them, they may not know them.

• A specific region or olive mill, rather than only the country of origin.

• Taste. Bitterness at the back of the tongue and pepperiness in the throat are positive characteristics, not defects.

More on this: How to Recognise High-Quality Extra Virgin Olive Oil

Frequently Asked Questions

Why is my olive oil bitter?

Because it contains polyphenols. Bitterness (amaro) and pepperiness (piccante) are recognised as positive sensory characteristics of extra virgin olive oil in international sensory assessment methods.

Does a peppery sensation in the throat mean the oil has gone bad?

No. Rancid olive oil usually tastes flat and dull and can smell like old fat. The peppery sensation is associated with certain phenolic compounds in fresh olive oil.

What does early harvest mean?

It means harvesting olives while they are still predominantly green, typically at a Jaén maturity index below 3. In the Northern Hemisphere, this usually means October to early November.

Which olive varieties are used in Bittergreen?

Frantoio 50%, Leccino 30%, and Moraiolo 20% — three classic Tuscan varieties grown in the province of Grosseto.

Does the flavour change from one harvest to the next?

Yes. The varietal blend stays the same, but weather conditions during each growing season affect intensity and flavour. Olive oil is an agricultural product, not an industrial one — complete uniformity between harvests would be unusual rather than reassuring.

Sources

• Uceda, M., Frías, L. (1975). Épocas de recolección: evolución del contenido graso y del índice de madurez. — origin of the Jaén maturity index.

• Servili, M. et al. (2009). Health and sensory properties of virgin olive oil hydrophilic phenols. Food Chemistry.

• International Olive Council (IOC), Method for the Organoleptic Assessment of Virgin Olive Oil, COI/T.20/Doc. 15.

• Consorzio per la Tutela dell'Olio Extravergine di Oliva Toscano IGP, current disciplinare di produzione.