Coratina
The reference high-phenol Italian variety, and the one whose phenol load has been shown to translate directly into shelf life. In a same-site, same-mill comparison of eleven cultivars, Coratina measured 29.5 hours of oxidative stability against Leccino’s 17.5.
In the grove
Coratina occupies some 70,000 hectares in Puglia, 60,000 of them in the province of Bari around the town of Corato that gave it its name. The IOC suggests it descends from Frantoio and Lezze. It has weak to medium vigour, enters production early, tolerates cold, and detaches easily enough for mechanical harvesting — but it is highly susceptible to olive fruit fly and only weakly self-fertile.
The remarkable finding about Coratina is longevity. A peer-reviewed study followed monovarietal Coratina kept in tins, in the dark, at ambient temperature, and found it still met the legal extra virgin limits after six years, with K270 the first parameter to fail. The other side of the same coin is bitterness: the variety produces so much of it that harvest date, not processing, is the lever growers use to keep it drinkable.
Compared with the other reference cultivars
| Cultivar | Origin | Typical polyphenols | Sensory profile | Best pairing |
|---|---|---|---|---|
| Coratina | Puglia, Italy | 330–410 mg/kg | Powerfully green and herbaceous, strong bitterness and pungency | Bean soups, grilled meat, bitter greens |
| Picual | Jaén, Spain | 300–700 mg/kg | Intensely green, clean bitterness, late-building pungency | Tomato salad, grilled vegetables, bread and salt |
| Koroneiki | Messinia, Greece | Around the Greek mean; Cretan surveys 138–441 mg/kg | Green and aromatic, balanced bitterness and pungency | Greek salad, feta, grilled fish, horta |
| Arbequina | Lleida, Spain | 200–230 mg/kg | Soft, sweet entry, barely bitter, light pungency | Fish, salads, baking, mayonnaise |
| Frantoio | Tuscany, Italy | ~230 mg/kg | Aromatic and grassy, bright green, firmly pungent when early | Ribollita, grilled bread, white beans |
| Leccino | Tuscany, Italy | ~150 mg/kg | Mild and soft, light spice, low bitterness | Fish, delicate vegetables, blending with Frantoio |
| Moraiolo | Umbria, Italy | ~270 mg/kg | Intense and structured, pronounced bitterness and pungency | Legume soups, grilled meat, bruschetta |
| Taggiasca | Liguria, Italy | Low (no measured range published) | Delicate and sweet, almond and pine nut, almost no bitterness | Pesto, fish, shellfish, steamed vegetables |
Polyphenol figures are the ranges published for each variety, not measurements of any bottle in the library. A single oil's figure depends on when it was picked and how it was milled, and is shown on that oil's own page where the producer states one.