The Art of Wine Making: Determining How Long to Age the Wine

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Aging of a wine before bottling is a balance between the wine’s inherent qualities and the winemaker's goals.

The decision often involves experimentation, understanding the vineyard, and following the wine’s natural development over time.

Here are some of the considerations that a wine maker may use when deciding how long to age a wine before they bottle it for sale:

• Grape Variety - Red grapes have more structure and tannin that allow for greater aging

• Acidity - Higher acidity wines are better suited for aging

• Alcohol Content - Higher alcohol wines generally age better

• Tannin - Tannin levels allow a wine to age better and the levels will reduce with aging

• Sugar - Higher residual sugar (RS) level allow a wine to age better

• Phenolic Compounds - Wines with a higher concentration of phenolics can age better

• Oak Barrels - New barrels impart significant flavor while used barrels impart little flavor

• Vintage Characteristics - Different vintages can age better than others

But, probably the most important factor used in making the wine-aging decision is the wine maker’s intended style. Wine aging is a balance of science and art, and the winemaker's vision for the final product plays a significant role in determining how long a wine will be aged before it’s released for consumption.

Some winemakers strive for wines with complexity and depth, which often requires extended aging. With time, a red wine will develop secondary and tertiary flavors—things like earthiness, leather, tobacco, and dried fruits—along with more rounded, integrated flavors.

But, if a winemaker is aiming for a fresher, fruitier style of red wine they may not age the wine as long, instead focusing on preserving the bright, youthful flavors of the grape. These wines are often released young to emphasize their freshness and fruit-forward style.

The bottom line is that wine makers balance many factors in determining the optimal aging time for each wine. They use their experience and talent to influence how a wine will develop over time. Ultimately, the goal is to allow the wine to reach a point where the components are in harmony and meets or exceeds the expectations of the wine maker. Truly an art! Cheers!

The Art of Wine Making: Choosing Aging Vessels Other Than Oak Barrels

An Amphora Wine Vessel

(Image by OpenClipart-Vectors from Pixabay)

Oak barrels are often the choice of a wine maker for an aging vessel. But, did you know, stainless steel, concrete and amphora are also used by wine makers in order to achieve the wine style that they desire.

Stainless steel is inert, meaning it doesn’t impart any flavors to the wine. This allows the pure expression of the grape variety, terroir, and vintage characteristics to shine through. Stainless steel aging vessels help preserve a wine’s aromas, bright fruit flavors and acidity. They can also be made airtight so that the wine is exposed to little or no oxidation during the aging process.

Winemakers have found that concrete aging vessels are semi-porous and allows for oxygenation like oak. It is also a neutral material that does not impart flavor and it is a natural insulator that stabilizes the temperature of the wine during aging. This allows winemakers to produce wines that tend to preserve the bright and fruit-forward flavors while still allowing for the important process of allowing the wine to ‘breathe’ during production.

Amphora is a ceramic vessel usually made of earthenware (e.g., clay or terra cotta) that was originally used in the transport of grains in Roman times. Research has shown that the use of amphorae dates to as early as 6,000 B.C. Amphora earthenware is naturally porous, like concrete, but it can also be made to be impervious to external oxygen by internally lining it with wax (i.e., beeswax) or tree resin. This creates a thin, smooth, polished coating that does not impart any flavor. Or, if the winemaker desires, it may be left unlined. Additionally, the amphora vessels can be left uncovered or sealed to prevent air contact with the wine.

The Art of Wine Making: Choosing to Allow a Wine to Age On-Lees

Aging wine on lees (also known as sur lie aging) is a winemaking technique that can play a role in shaping the flavor, texture, and complexity of a wine—especially whites like Chardonnay, Champagne, and Muscadet, but also increasingly in reds and even natural wines.

Lees are the dead yeast cells and other solids (like grape skin particles) that remain in the wine after fermentation. There are two types (1) Gross lees which are heavy, coarse sediment that settles quickly and is usually removed and (2) the fine lees which are the smaller, finer particles that remain suspended longer and are typically the focus of lees aging.

After fermentation, the wine is left in contact with the fine lees for an extended period (ranging from a few months to several years). The winemaker may choose to stir the lees periodically (known as bâtonnage) to encourage more contact or leave the lees undisturbed to preserve freshness and minerality. Over time, the yeast cells break down and release compounds into the wine. 

Aging a wine on-lees can affect several aspects of the final product. It can add texture, giving the wine a richer, creamier mouthfeel. It also adds complexity to the wine with flavors of yeast, brioche, toast and even a bit of nuttiness. Finally, aging on-lees can naturally protect the wine against oxidation.

So, aging a wine on-lees is yet another part of the art of wine making. Cheers!

Ever Wonder About the Types of Oak Used in Wine Barrels?

Photo by Jonathan Borba on Unsplash

Wine may be fermented and aged in a variety of materials including stainless steel, ceramic vessels, including concrete, and in oak barrels.

Oak barrels add additional quality, character and smoothness to wines and can impart many flavors into the wine. 

Barrels for wine-making are commonly made of French common oak (Quercus robur), white oak (Quercus petraea), and American white oak (Quercus alba)

Of the various species of oak, Quercus robur is said to provide a fuller body and larger tannin structures, giving less complexity and elegance than Quercus petraea. Forests in Hungary and France grow both species, including hybrids of the two. These two species are quite distinct from Quercus alba (American oak) in the flavors they impart.

Here’s a quick summary of the differences:

• American Oak - Wine barrels made in the US are typically from White Oak that is grown in the east and mid-west. American oak is known for imparting sweeter flavors of vanilla, coconut, as well as dill and sweet spices.

• Hungarian Oak - These barrels may be made from either the Quercus robur or Quercus petraea species. Quercus robur is said to provide a fuller body and larger tannin structures, giving less complexity and elegance than Quercus petraea. Hungarian oak barrels are known for imparting bolder, richer flavors of butterscotch, vanilla, clove, cinnamon, and toffee.

• French Oak - French oak wine barrels are from the Quercus robur species but tend to have finer grains. The flavors imparted from French oak are said to be more subtle and include dark chocolate, roasted coffee beans and exotic, savory spices.

All of these imparted flavors can be dialed-up or down depending on the degree to which the barrels are ‘toasted.’ A winemaker will decide on what degree of toasting is appropriate for their wine’s style. Our 'job' as wine drinkers is simply to enjoy all the wonderful flavors that oak, and toasted oak, add to our wine. Cheers!

Ever Wonder What Makes a Wine Age Worthy? (Part 2)

Wines with the best “structure” will generally age most gracefully.

Finding wines that will improve over time requires that you pay attention to a wine’s structure. What is structure? These are the primary components:

• Acidity - Wines lose acidity over time, so it’s important that the acidity be moderately high to aid as a preservative. Acidity can be detected in a wine by it mouth-watering characteristic.

• Tannin - These compounds stabilize a wine’s flavor and help maintain its color. Tannins, when young, will be detected by its astringency or mouths-drying characteristic.

• Alcohol - Acts as a stabilizer in higher amounts (e.g. fortified wines) and in some dry wines with >15% ABV). Alcohol levels are generally printed on the label. High levels of alcohol can be detected by a mild burning sensation in the throat after swallowing.

Finally, it’s the interaction of tiny amounts of oxygen in the bottle along with the acids, tannins and alcohol that produce the chemical interactions that affect how a wine ages.

But, each of these attributes must be in balance with one another. That is, in proportion to each other. And, the best way to know if a wine is balanced is by tasting it and learning to detect this overall balance.

Here are some wines that tend to have good structure that tend to be age-worthy:

• Cabernet Sauvignon

• Syrah

• Merlot

• Bordeaux Wines (which are primarily blends of Cabernet Sauvignon, Merlot and Syrah)

• Nebbiolo

• Sangiovese (the grape used in Italian Chianti)

• Tempranillo (the grape used in Spanish Rioja)

• Pinot Noir (the grape used to make red Burgundy)

• Malbec

Even with this knowledge, experienced collectors sometimes have trouble determining which wines will age and for how long. So, you’re not alone in trying to figure this out.

Again, most wines are ready for consumption as soon as they are bottle. It’s only a very small percentage of wines that are actually able to age well. And, you’ll probably need to spend $50 (US) or more to find such age-worth wines.

So, if you find a great red wine, with great structure and it’s well-balanced, try putting a few more away in proper storage, and then pull them out one at a time (every 6 to 12 months) to see how they are changing with age. Hopefully for the better! Cheers!