Tertiary Aromas

Definition

Tertiary aromas, also called maturation aromas or bouquet, are complex aromas that develop during bottle aging. They arise through slow chemical reactions in the sealed bottle — primarily oxidation, polymerization, and the interaction of acids, alcohols, and phenols. Tertiary aromas give aged wines depth, complexity, and an additional aromatic layer that goes beyond the original primary and secondary aromas.

Formation of Tertiary Aromas

Bottle Aging and Time

Tertiary aromas develop exclusively during bottle storage, not in barrel or tank. The process takes years to decades and proceeds very slowly. The rate depends on several factors:

Oxygen: The minimal oxygen that diffuses through the cork or remains in the bottle at sealing drives oxidative reactions. Too much oxygen (defective cork) leads to oxidation and wine faults; too little (screw cap) can slow or alter the development of tertiary aromas.

Temperature: Ideal storage conditions (10–15°C) promote slow, controlled development. Higher temperatures accelerate maturation but can lead to premature aging. Temperature fluctuations are harmful.

Light: UV light can negatively affect tertiary aromas and cause premature aging. Darkness is ideal.

Humidity: High humidity (70–80%) keeps corks supple and prevents excessive oxygen ingress.

Chemical Processes

The formation of tertiary aromas is complex and not fully understood:

Oxidation: Slow reaction with oxygen alters fruit aromas, breaks down tannins, and produces aldehydic, nutty aromas.

Polymerization: Tannins and anthocyanins bond into larger molecules, becoming softer and settling partly as sediment. This changes the texture and produces aromas of leather, tobacco, and forest floor.

Hydrolysis: Breakdown of esters and other compounds, creating new aromatic substances.

Reductive aging: In the absence of oxygen (screw cap), different tertiary aromas develop — often more spice, reduction, and fewer oxidative notes.

Categories of Tertiary Aromas

In White Wines

Honey: One of the most characteristic tertiary aromas in aged white wines, especially Riesling, Chenin Blanc, or Sémillon. Formed through oxidation and the transformation of fruit esters.

Petrol/Kerosene: A controversial but typical maturation aroma in Riesling, produced by the compound TDN (trimethyldihydronaphthalene). Some love it; others find it off-putting.

Roasted nuts: Almonds, hazelnuts, walnuts — formed through oxidative processes and typical of aged Chardonnay, Sherry, or Pinot Blanc.

Wax/Beeswax: Especially in old Riesling or Chenin Blanc — a waxy, slightly oily note.

Marzipan: Sweet almond note, typical of aged white wines with some residual sweetness.

Dried fruits: Dried apricot, orange peel, candied lemon — the fresh primary fruit transforms into concentrated, dried versions.

Caramel/Toffee: In oxidatively aged white wines or sweet wines such as Sauternes.

Mushrooms: Champignon, porcini, truffle — can appear in very old white wines, especially Burgundy.

In Red Wines

Leather: One of the most classic tertiary aromas in aged red wines — from soft suede to old, worn leather. Formed through tannin polymerization and oxidation.

Tobacco: Dried tobacco, cigar box, tobacco leaf — typical of aged Bordeaux, Cabernet Sauvignon, or Nebbiolo.

Forest floor/Undergrowth: Earthy, mushroomy notes of damp forest floor, rotting leaves, or humus. Particularly pronounced in aged Pinot Noir or Nebbiolo.

Mushrooms: Porcini, morel, truffle — a delicate tertiary note in fine, aged red wines.

Dried fruits: The fresh red fruit transforms into compote, prunes, dried cherries, figs, or raisins.

Tar: A characteristic note in aged Barolo or Barbaresco — dark, bituminous, complex.

Spices: The primary or secondary spice notes develop further — fresh pepper becomes dried pepper, clove becomes cinnamon.

Gamey/Roasted meat: In very old, mature red wines, umami-like, meaty notes can appear — game, boudin noir, bouillon.

Soy/Umami: Soy sauce, miso, dried mushrooms — complex, savoury tertiary notes in very old wines.

Liquorice: Develops from primary aromas into dried, concentrated liquorice.

Common Tertiary Aromas

Clove, cinnamon, nutmeg: Sweet spices that develop from primary or secondary notes.

Coffee grounds, cocoa: Dark, bitter notes in very old red or white wines.

Vanilla (aged): Fresh barrel vanilla develops into aged, concentrated vanilla essence.

Medicinal/Iodine: In very old wines, complex, almost medicinal notes can appear — iodine, camphor, menthol.

Tertiary Aromas in Different Wine Styles

Burgundy Pinot Noir

Aged Pinot Noir from Burgundy shows classic tertiary aromas:

• Young (0–5 years): Dominance of primary aromas (cherry, raspberry, strawberry) and secondary aromas (oak, spice)
• Mid-age (5–15 years): Integration, development of forest floor, mushrooms, dried herbs, leather
• Mature (15–30+ years): Complex bouquet of truffle, undergrowth, dried rose petals, soy, meat broth

Barolo and Nebbiolo

Nebbiolo wines are long-lived and develop characteristic tertiary aromas:

• Young: Cherry, rose blossom, liquorice, firm tannins
• Maturing (10–20 years): Tar, dried roses, tobacco, leather, truffle
• Fully mature (20–40+ years): Complex bouquet of forest floor, white truffle, soy, dried herbs, cigar box

Bordeaux (Cabernet-based)

Bordeaux wines age elegantly over decades:

• Young: Blackcurrant, cedarwood, tobacco (young), graphite
• Mid-maturity (10–20 years): Cigar box, leather, dried leaves, pencil shavings
• Full maturity (20–50+ years): Tobacco, leather, truffle, game, dried fruits, forest floor

Riesling

Riesling is one of the most long-lived white wines and develops fascinating tertiary aromas:

• Young: Lime, green apple, minerality
• Mid-maturity (5–15 years): Honey, petrol (TDN), beeswax, ripe apricot
• Full maturity (15–50+ years): Intense petrol, honey, candied orange peel, nuts, resin

Vintage Champagne

Champagne develops complex tertiary aromas through long lees aging and bottle maturation:

• Young (0–5 years after disgorgement): Brioche, citrus, fresh yeast aromas
• Mid-maturity (5–15 years): Roasted nuts, honey, toast, butter biscuit
• Full maturity (15–30+ years): Truffle, mushrooms, dried fruits, nougat, complex umami notes

Sherry and Oxidative Wines

Sherry develops intense tertiary aromas through deliberate oxidation even before bottling:

• Fino/Manzanilla: Almonds, yeast, saline notes, chamomile
• Amontillado: Hazelnut, caramel, toffee, dried fruits
• Oloroso/Palo Cortado: Walnut, dried figs, dates, leather, tobacco, chocolate

These oxidative tertiary aromas are formed through flor yeast or deliberate oxidation in cask and are the defining characteristic of these wine styles.

Factors for Aging Potential

Not all wines develop tertiary aromas. Aging potential depends on several factors:

Structure and Balance

Acidity: High acidity acts as a natural preservative and is the most important factor for longevity. Riesling, Nebbiolo, and Sangiovese have high acidity and age superbly.

Tannins: In red wines, tannins stabilise the wine and polymerize during maturation, influencing texture and tertiary aromas.

Alcohol: Higher alcohol contributes to preservation, but too much can upset the balance.

Residual sugar: Sweet wines often age better than dry ones, as sugar acts as a preservative (Sauternes, Eiswein, Vintage Port).

Extract and concentration: Wines with more extract and concentration have more "material" for the development of tertiary aromas.

Quality and Origin

Grand Cru vs. simple wine: Wines from better sites often have more structure, balance, and potential for long aging.

Vintage quality: Great vintages with optimal ripeness and balance age better than problematic years.

Winemaker and vinification: Careful winemaking without excessive manipulation promotes aging potential.

Storage

Even a great wine will not develop beautiful tertiary aromas in poor storage conditions:

• Constant, cool temperature (10–15°C)
• High humidity (70–80%)
• Darkness
• No vibrations
• Stored on its side (keep cork moist)

Tasting and Evaluation

Recognising Tertiary Aromas

When tasting aged wines:

• Is the primary fruit still present or has it receded?
• Which non-fruit aromas are perceptible (leather, tobacco, mushrooms)?
• How complex is the bouquet — multi-layered or one-dimensional?
• Is the wine in balance or does it show signs of excessive aging?

Colour Change

Tertiary aromas are often accompanied by changes in colour:

White wine: From pale yellow through golden yellow to amber or brownish (in very old wines)

Red wine: From violet through ruby red to brick red, brownish-red, or orange-brown (in very old wines)

Excessive browning can indicate over-aging or oxidative damage.

Positive vs. Negative Aging

Positive tertiary aromas: Complex, harmonious, integrated, balanced with structure — the wine has gained depth

Negative aging: Flat, oxidised, dry, hollowed out — the fruit has disappeared without complexity developing; the wine is "dead"

The Right Drinking Window

The art lies in finding the optimal drinking window:

Too young: Dominance of primary and secondary aromas, closed bouquet, hard tannins, unintegrated

Optimal maturity: Harmony of primary, secondary, and tertiary aromas, soft tannins, complex bouquet, full expression

Too old: Tertiary aromas are present, but fruit and structure have disappeared, oxidative notes dominate, the wine seems tired

This moment varies greatly depending on the wine, vintage, and personal taste. Some prefer young, fruit-forward wines; others appreciate ripe, tertiary complexity.

Tertiary Aromas and Food Pairing

Aged wines with tertiary aromas pair with different dishes than young wines:

Umami-rich Dishes

Tertiary aromas harmonise superbly with umami:

• Mushroom dishes: Porcini risotto, truffle pasta, sautéed morels
• Aged meats: Dry-aged beef, game roast, duck breast
• Stocks and fondues: Beef broth, demi-glace, reduced sauces

Classic Combinations

• Barolo with truffle: The tertiary truffle aromas of the wine mirror the fresh truffles in the dish
• Old Bordeaux with lamb: Leather and tobacco notes complement rosé-roasted lamb perfectly
• Aged Riesling with foie gras: Honey and wax notes balance the richness

Cheese

Aged wines often pair better with aged cheese:

• Old red wine with Comté, aged Gouda, Manchego: The nutty, complex aromas harmonise
• Aged white wine with mountain cheese or truffle cheese: The tertiary notes complement each other

Avoid

• Fresh, light dishes (they do not challenge the aged wine)
• Heavily spiced, dominant sauces (they mask the subtle tertiary aromas)
• Very sweet desserts (except with sweet wines)

Screw Cap vs. Cork

The closure type affects the development of tertiary aromas:

Natural Cork

• Allows minimal oxygen ingress (1–2 mg per year)
• Promotes oxidative tertiary aromas (leather, tobacco, nuts)
• Traditional for age-worthy wines
• Risk of cork taint (TCA) or leaky cork

Screw Cap

• Nearly airtight, minimal oxidation
• Develops different, more reductive tertiary aromas
• Wines remain fresh and fruity for longer
• Some wine lovers prefer the oxidative notes of cork; others appreciate the freshness of screw caps

Studies show that wines age differently under screw cap — not worse, just differently.

Frequently Asked Questions

How long must a wine age to develop tertiary aromas?

This varies greatly: some wines show the first tertiary notes after 3–5 years (light reds, whites), while others need 10–15 years (Barolo, Bordeaux) or 20–30+ years (great vintages, Riesling).

Do all wines improve with age?

No. Only 1–5% of all wines produced benefit from long bottle aging. Most wines are made for immediate consumption and do not develop interesting tertiary aromas — they simply tire and lose fruit.

Can I accelerate tertiary aromas?

Not recommended. Higher storage temperatures speed up maturation, but the result is rarely harmonious. Artificial aging (heat, oxygen) does not produce genuine tertiary aromas — only oxidation.

Are tertiary aromas always desirable?

It is a matter of taste. Many people prefer young, fruit-forward wines. Tertiary aromas are complex but sometimes less approachable. Some "tertiary" notes (excessive oxidation, mustiness) are wine faults, not desirable maturation.

Conclusion

Tertiary aromas are the result of patient bottle aging and give great wines an additional dimension of complexity and depth. They represent the pinnacle of aromatic evolution — from fresh primary fruit through secondary aromas from the cellar to the multi-layered, earthy, spicy tertiary notes of mature wines. Understanding tertiary aromas is essential for appreciating old wines and helps in assessing when a wine has reached its optimal drinking window.