Phenolic ripeness
Phenolic maturity is often treated as a measurable target: reached or missed, "green" or "ripe." This view underestimates the complexity. In context, phenolic maturity describes not a single signal, but a relationship between structure, time, and decision.
It concerns how a wine will later develop: whether tannins and texture integrate or isolate. Precisely for this reason, it is less a date than a responsibility that cannot be fully calculated.
The two kinds of ripeness do not run in step. Sugar can already signal “ready to pick” while the phenols are not yet — especially in warm years, where sugar ripeness often runs ahead of phenolic ripeness. Whoever looks only at must weight may then harvest grapes with ripe sugar but unripe tannins.
What Ripens in the Seed
Unripe grapes contain a lot of strongly astringent tannin, above all in the seeds. As ripening progresses, the softer tannins of the skins move to the fore, and the green, herbaceous note — chemically bound to methoxypyrazines — recedes. Ripe phenols later give tannins that carry without scratching; unripe ones stay hard and angular, even after years in the cellar.
In the vineyard this is not only measured but tasted. You chew berries and seeds: if the seeds are still green and bitter, phenolic ripeness has not been reached; if they turn brown, woody and taste nutty, it is further along. The skin, too — its taste and how easily it separates from the berry — is part of this picture.
More Time Is No Guarantee
A common misconception equates phenolic ripeness with “picking later.” Time is a condition, but not a guarantee. Grapes picked later can bring softer tannins, but at the same time lose tension and push the wine into a broader, more alcoholic balance. Too early preserves hardness, too late costs definition — both can make a wine harder to read.
A Decision with Risk
The real question, therefore, is not when it is ripe, but which form of ripeness serves the wine. The picking date is a balance between the risk of hardness and the risk of slackness. It can be prepared for and steered, but not fully calculated — nature sets the pace.
How We Understand It
At LaSuite aux Conseillans we therefore time the harvest not by sugar alone, but by the interplay of acidity, aromatics and tannin ripeness — picked and tasted plot by plot. When phenolic ripeness succeeds, it shows itself not as maximum softness but as supporting structure: the tannin holds without pushing itself forward.