The Glera grape is the cornerstone of Prosecco DOC, comprising at least 85% of the blend in both standard and rosé versions. It grows in large, loosely packed bunches with a golden-yellow hue when ripe, typically harvested between late August and early September to ensure ideal sugar, acidity, and aroma balance. Prompt transport to the cellar preserves its delicate character. With generous yields of up to 18 tonnes per hectare, Glera may be blended with up to 15% of other varieties—both native and international—to enhance complexity. This versatile grape defines Prosecco’s signature freshness, elegance, and aromatic profile.

Characteristics of the Glera Grape

• Appearance:
  • Large, long, loosely-packed, often winged bunches.
  • Vibrant yellow color when ripe.
• Role in Prosecco:
  • Star of Prosecco DOC, making up a minimum of 85% of the blend in both Prosecco DOC and Prosecco DOC Rosé.

Ripening Process

• Optimal Ripeness:
  • Achieved between the end of August and beginning of September.
  • Ensures balance of sugars, acidity, and aromatic compounds for high-quality Prosecco.

Harvesting and Transport

• Speed of Transport:
  • Grapes must be quickly transported to the cellar post-harvest.
  • Prevents unwanted fermentation and preserves delicate aromas and flavors.

Yield

• Generosity of Glera:
  • Can yield up to 18 tonnes per hectare.

Blending with Other Varieties

• Blend Composition:
  • Up to 15% of the Prosecco DOC blend can include other permitted varieties.
• Native Grapes:
  • Bianchetta, Perera, Verdiso, Glera Lunga.
• International Varieties:
  • Chardonnay, Pinot Bianco, Pinot Grigio, Pinot Nero.
• Purpose of Blending:
  • Adds complexity and nuance to the final wine.

Conclusion

• The Glera grape is foundational to Prosecco DOC, contributing to its distinctive qualities and celebrated flavors.