Aidani grape variety, also spelled Aidani Aspro, is a white wine grape indigenous to the Aegean Islands, particularly prominent in Santorini and other parts of Greece. It is one of the traditional varietals used in the production of the famed Santorini wines, often blended with Assyrtiko and Athiri to create the distinctive, aromatic white wines of the region. Here are the most comprehensive technical characteristics of the Aidani grape variety:

Origin and Distribution

Aidani is native to Greece, with its presence most significantly noted in the Cyclades islands, especially on Santorini.

While primarily found in Greece, its cultivation is quite limited and focused, with no significant plantings outside its native region.

Viticultural Characteristics

- **Growth Habit:** Aidani vines tend to be vigorous, thriving in the volcanic soil of Santorini and the surrounding islands.

- **Bud Break and Ripening:** It generally has a late bud break, which helps in avoiding spring frosts, with a moderate ripening period that suits the warm, Mediterranean climate.

- **Yield:** The variety typically produces moderate yields, but in the challenging growing conditions of Santorini, such as limited rainfall and high winds, yields can be quite low.

- **Cluster and Berry Size:** Aidani grapes form in small to medium-sized clusters with relatively large berries, contributing to its aromatic profile.

Winemaking Characteristics

- **Aromatics:** Aidani is highly valued for its aromatic contribution to blends, offering floral notes such as jasmine and orange blossom, alongside hints of citrus and tropical fruits.

- **Acidity:** While not as high in acidity as Assyrtiko, Aidani still contributes a fresh, vibrant acidity to the wines, enhancing their overall balance and ageability.

- **Body and Flavor:** Wines made from Aidani tend to be medium-bodied with a soft palate feel. When vinified as a varietal wine, Aidani showcases its floral and fruity profile, with a smooth and almost delicate texture.

### Styles and Blending

- **Blending:** Aidani is most commonly blended with Assyrtiko and sometimes Athiri in the production of Santorini's PDO wines. The blend aims to balance Assyrtiko's high acidity and mineral character with Aidani's aromatic qualities.

- **Wine Styles:** Apart from dry white wines, Aidani is also used in the production of sweet wines and Vinsanto, a traditional dessert wine of the region, where its aromatics add complexity to the blend.

### Regional Expressions

- **Santorini:** In its native terroir, Aidani expresses a unique combination of aromatic intensity with minerality and freshness, reflecting the island's volcanic soils and climatic conditions.

Aidani remains a somewhat obscure variety outside of Greece but is integral to the unique blends and wine styles of the Aegean Islands. Its cultivation and vinification are emblematic of the region's winemaking traditions, offering a distinct and aromatic profile that complements the more widely recognized Assyrtiko grape. Despite its limited presence, Aidani plays a crucial role in the aromatic and flavor profile of some of the most esteemed Greek wines, contributing to the diverse tapestry of indigenous Greek varietals.