Q. Every year I make a Sangiovese-Barbera wine with grapes from our home vineyard that comes out very well. This vintage has been aging in a previously used (neutral) 33-gallon (124-L) Saury French oak barrel since mid-October of last year. I top up the barrel weekly with the same wine left over from previous vintages. After several barrel tastings, I am not completely happy with the results. It is soft and smooth, but unlike previous years, it has very little fruit-forward profile. Do you have a recommendation to boost the light fruit taste? 
Jim D’Amico
Mt. Hamilton, California

A. “Fruit” is often one of the most misunderstood concepts in wine. Fruit aroma isn’t usually something we can simply pour into a barrel like seasoning into a soup. Instead, fruit expression is the result of a complex interaction between aroma compounds, acidity, tannin structure, alcohol, oak influence, and even our perception of sweetness.

I’ve tasted plenty of wines over the years that were technically sound but seemed a little quiet or reserved in the fruit department. Sometimes they simply needed more time. Sometimes a slight adjustment helped reveal fruit that was already there but hidden behind other structural elements.

Before we start talking about additives, however, let’s talk about one of the oldest and most important tools in the winemaker’s toolbox — blending.

Commercial winemakers often refer to their collection of blending wines as their “spice box.” Just as a chef reaches for herbs and spices to fine-tune a dish, winemakers use blending wines to bring balance, complexity, freshness, structure, or fruit to a finished wine.

Sometimes a wine only needs a small percentage of another wine to wake it up and make it sing. In Napa Valley, Zinfandel is a frequent visitor to my blending bench. Even at relatively low percentages, Zinfandel can contribute juicy berry character, a little jamminess, and additional aromatic layers that help lift a blend. The beauty of blending is that you’re not adding anything artificial. You’re using wine to improve wine, which is a practice as old as winemaking itself.

Before making any additions to your barrel, I’d strongly encourage you to pull several bench samples and experiment with small blending trials if you have access to any other wines.

Another possibility worth considering is whether the fruit is actually being masked rather than missing. One culprit that sometimes flies under the radar is low-level TCA contamination. Most home winemakers know TCA as the compound responsible for “corked” wines. At high concentrations, it smells like damp cardboard, moldy newspapers, or a wet basement. But at very low levels, TCA doesn’t always announce itself so clearly. Instead, it can suppress fruit aromas and make a wine seem dull or muted.

I’d also make sure the wine is healthy and stable. Check sulfur dioxide levels and confirm that the wine is free from low-level oxidation.

Assuming the wine is sound and blending doesn’t quite get you where you’d like to go, there are a few modern tools worth exploring.

One category that has become increasingly sophisticated over the last couple of decades is specialty finishing tannins. These products, available from several suppliers, aren’t designed to make a wine taste tannic. Instead, some are formulated specifically to enhance fruit perception, improve mid-palate weight, or increase aromatic persistence. In my own winemaking, I’ve occasionally used finishing tannins on wines that were nearly bottle-ready but felt like they needed a little extra lift. The key word here is occasionally. These products are not magic bullets, and success depends entirely on careful bench trials.

To evaluate a finishing tannin, prepare a series of small wine samples, often 50- or 100-mL aliquots, and use laboratory micropipettes to measure tiny amounts of product into each sample. Careful tasting notes are essential because the differences can be surprisingly subtle.

I’d also encourage you to think back to the growing season itself. Every vintage tells a different story. Cooler weather, larger crop loads, delayed ripening, or differences in canopy management can all influence the fruit profile of the finished wine.

What encourages me most is your description that the wine is “soft and smooth.” Those are not words I usually hear when a wine is fundamentally troubled. In fact, they suggest you’re starting with a sound, pleasant wine that may simply be expressing itself differently than previous vintages.

My advice would be to start with blending trials, move to specialty finishing tannins only if needed, and make every decision on the bench before touching the barrel.