🌿 Grape ripeness
The state of the berries when sugar, acidity and flavour are ready for wine.
Grape ripeness is the state of the berries when they hold enough sugar, acid and flavour to make good wine. As grapes ripen, sugar rises, acid falls, and colour and aroma change. The start of this process is called veraison: the berries change colour and soften.
Ripeness comes in different kinds. Sugar ripeness shows how much sugar is in the juice. Phenolic ripeness is the maturity of skins and seeds, which affects tannins and colour. For wine, these need to line up with the right level of acid. Sugar is measured with a refractometer, an instrument that uses a drop of juice, and flavour is checked by tasting berries.
Ripeness decides the harvest date: too early, and the wine is sharp and thin; too late, and it is heavy and low in acid. The winemaker decides together with the grower. Weather and climate shift the timing, so every year is different.
How it connects to Wine
🌿 Grape ripeness → kind of → 🌿 Viticulture → kind of → 🍷 Wine
Links
- Previous step
- 🌿 Véraison
- Next step
- 🌿 Grape harvest, 🍷 Refractometer
- Part of
- 🌿 Viticulture
Frequently asked questions
How is grape ripeness checked?
Sugar is measured with a refractometer, acidity is tested and berries are tasted.
What is veraison?
The start of ripening, when berries change colour and soften.
Why does the harvest date matter?
It sets the balance of sugar, acid and flavour in the wine.
What to read next
- 🌿 Grape harvest — The autumn picking of ripe grapes for wine.
- 🌿 Véraison — The moment grapes soften and turn from green to their own colour.
Similar
🌿 Pruning shears · 🌿 Sustainable viticulture · 🌿 Sulphur dusting · 🌿 Cutting · 🌿 Canopy (grape) · 🌿 Vintage