Glera
WhiteGlera is the primary white grape variety behind Italy's celebrated Prosecco sparkling wines, offering fresh, approachable wines with delicate fruit character. Originally known as Prosecco until 2009, this variety produces light, effervescent wines that have become synonymous with Italian sparkling wine culture worldwide.
Key Characteristics
- •Late-ripening variety with moderate acidity
- •Neutral flavor profile ideal for sparkling wine production
- •Susceptible to fungal diseases and drought stress
- •High productivity with generous yields
- •Tank method fermentation preferred
Typical Flavors
Major Regions
Conegliano-Valdobbiadene DOCG · Prosecco DOC (Veneto) · Colli Asolani DOCG · Friuli-Venezia Giulia · Treviso Province · Asolo Hills · Cartizze
Also Known As
Briška Glera
Overview
Glera represents one of modern viticulture's most remarkable success stories, transforming from a regional Italian variety into a global phenomenon within mere decades. This white grape variety produces wines characterized by their fresh, clean profile and delicate fruit expression, making them ideally suited to the tank method of sparkling wine production. The variety's inherently neutral character allows winemakers to craft wines that emphasize freshness and immediate appeal rather than complex aging characteristics. The grape's commercial trajectory changed dramatically in 2009 when regulatory authorities renamed the variety from Prosecco to Glera, simultaneously establishing Prosecco as a protected geographical designation. This strategic move protected the commercial interests of Italian producers while allowing for significant expansion of production areas. Today, Glera-based wines represent some of the world's most accessible and widely consumed sparkling wines, appealing to consumers seeking lighter, less complex alternatives to traditional method sparkling wines.
Origins & History
Glera is the grape behind Prosecco, Italy's most popular sparkling wine. The variety was renamed from Prosecco to Glera in 2009 to protect the Prosecco name as a geographical designation rather than a variety name. Glera has been cultivated in the Veneto and Friuli regions for centuries. DNA analysis suggests it originated in the village of Prosecco near Trieste, though the variety became associated with the hills of Valdobbiadene and Conegliano further west. The variety produces fresh, aromatic wines typically made sparkling through the Charmat (tank) method. The steep hills of Conegliano Valdobbiadene DOCG produce the finest examples, with the single-vineyard Cartizze representing the pinnacle of quality.
Viticultural Characteristics
Glera presents several viticultural challenges that require careful vineyard management. As a late-ripening variety, it demands sufficient growing season length and benefits from the extended autumns typical of northern Italian wine regions. The variety demonstrates particular susceptibility to powdery mildew (oidium) and downy mildew (peronospora), necessitating vigilant fungal disease management programs. Summer drought stress can significantly impact fruit quality, while the variety also shows vulnerability to millerandage (shot berries) and the serious phytoplasma disease flavescence dorée. Despite these challenges, Glera compensates with naturally high productivity, though yield management proves essential for maintaining fruit quality in premium designations.
Wine Styles & Characteristics
Glera produces wines with characteristically light body, moderate acidity, and delicate fruit flavors spanning green apple, pear, and subtle stone fruit notes. The variety's neutral profile makes it exceptionally well-suited to tank method (Charmat process) sparkling wine production, where the goal is preserving fresh fruit character rather than developing complex autolytic flavors. Most Glera-based wines are intended for immediate consumption, as the variety lacks the structural components necessary for extended aging. Alcohol levels typically range from 10.5% to 12% ABV, contributing to the wines' approachable, refreshing character that has driven their global popularity.
Genetic Lineage
Glera (formerly Prosecco) is indigenous to northeastern Italy, likely originating near the village of Prosecco near Trieste.
Clonal Selection
Origin: Veneto, Italy
Standard certified clone with good aromatic intensity and consistent quality.
Origin: Veneto, Italy
Selected for enhanced floral aromatics.
Origin: Cartizze, Italy
Selections from the prized Cartizze hill. Lower yields, more concentrated fruit with exceptional aromatic complexity.
Origin: Various, Veneto
Single-vineyard selections from steep hillside sites. Site-specific character.
Disease Profile
Glera is a high-yielding, late-ripening variety that maintains good acidity. The Charmat method of sparkling wine production preserves the variety's fresh, fruity aromatics. The best examples come from hillside vineyards where yields are naturally restricted and temperature variation is greater.
Susceptibilities
Can be affected in humid conditions.
Susceptible to downy mildew.
Resistances
Performs well in northeastern Italy's cooler conditions.
Maintains quality at relatively high yields, enabling large-scale production.
Terroir Preferences
The classic soil of Conegliano Valdobbiadene hills. Produces wines with good structure and aromatic complexity.
Found on plains. Produces lighter, simpler wines with less complexity.
The best sites with excellent drainage and exposure. Natural yield restriction produces more concentrated fruit.
The famed 107-hectare Cartizze hill. South-facing slopes and unique microclimate create the finest Prosecco.
Regional Expressions
The premium Prosecco zone, with steep hillside vineyards producing wines of genuine complexity. Rive (single-vineyard) and Cartizze bottlings represent the pinnacle. Styles range from Brut to Dry (confusingly, sweeter than Brut).
Notable producers: Bisol, Nino Franco, Adami, Ruggeri, Col Vetoraz, Bortolomiol
The Grand Cru of Prosecco. Only 107 hectares on a steep south-facing hillside between Valdobbiadene communes. Traditionally made in a slightly sweeter style (Dry) that showcases the fruit. Among Italy's most expensive sparkling wines.
Notable producers: Nino Franco, Bisol, Adami
The broader appellation covering much of Veneto and Friuli. Quality varies widely from industrial to artisanal. Best consumed young and fresh. Represents the vast majority of Prosecco production.
Notable producers: La Marca, Zonin, Numerous
The 'other' DOCG zone, often overlooked but producing quality wines. Hillside vineyards around Asolo produce elegant Prosecco that can rival Conegliano Valdobbiadene.
Notable producers: Montelvini, Giusti Wine