Content updated August 2026
Every fall, before the first press of the wine vintage even begins, a quieter harvest unfolds among the hills of our St. Helena estate. The olive harvest Napa Valley season moves quickly, guided by hand harvesting, careful handling, and a commitment to preserving the character of each fruit.
This is milling day at Marciano Estate: the beginning of our from-the-grove-to-bottle olive oil journey and the first step in creating our award-winning organic extra virgin olive oil.
The Marciano Estate Napa Valley Olive Grove
Our olive groves are home to hundreds of trees, a mix of Italian and Spanish cultivars chosen deliberately for the character each brings to the final oil. Frantoio, Leccino, Maurino, Nocellara and Coratina share the hillside with Arbequina, Manzanillo and Empeltre, alongside the Mission variety long associated with California groves. Some of our signature blends draw from this range of cultivars, each one contributing its own note of pepper, green fruit or herbal depth.
The groves are farmed organically, and that commitment shapes the rest of the property too. Cover crops keep the soil alive between the rows. Each spring, sheep graze through the estate, a practice that manages growth naturally while returning nutrients to the earth. Nothing here is left bare for long.
These practices reflect our approach to organic farming in Napa Valley, where careful vineyard and grove management support long-term soil health and the character of the estate.
Hand Harvesting Organic Olives in Napa Valley
When the olives reach the right point of ripeness, usually in the fall, our team hand-harvests them into small, vented bins. The bins matter as much as the hands. Vented containers keep the fruit from bruising or overheating in transit, which protects the oil’s flavor before it ever reaches the mill.
Speed is the discipline here. Olives begin to oxidize the moment they are picked, which is why same-day olive milling is essential to preserving freshness, aroma, and flavor. The bins move directly from grove to mill, often within hours of harvest.
Same-Day Milling: The Craft Behind Fresh Extra Virgin Olive Oil
Our on-site mill means the olives never leave the property between harvest and extraction. This olive oil milling process allows Marciano Estate to maintain control over every stage of production, from freshly harvested fruit to finished extra virgin olive oil.
That single detail defines the character of Marciano Estate olive oil: the fruit is pressed just moments after picking, while it is still cool and full of the aromatic compounds that fade with time and handling.
The result is a certified organic, 100 percent extra virgin olive oil, bottled unfiltered to preserve its vibrant, pungent, spicy character. Unfiltered oils carry more of the fruit’s natural sediment and polyphenols, the compounds responsible for the peppery finish our oils are known for.
After milling, the work continues. The leftover olive pomace is composted on-site, returning to the soil that grew it. It is a closed loop, grove to mill to earth and back again.
Award-Winning Napa Valley Organic Extra Virgin Olive Oil
We do not use the word “award-winning” loosely. Marciano Estate olive oil has earned multiple gold medals from the California Olive Oil Council, along with recognition from the Napa Valley Olive Oil Competition, and was named Best EVOO of the USA in 2023 by the EVOO World Ranking (EVOOWR). Our Italian blend and Arbequina both earned Gold Awards at the 2024 New York International Olive Oil Competition (NYIOOC), one of the largest juried olive oil competitions in the world (source: Olive Oil Times).
These are not marks of prestige for their own sake. They are third-party confirmation of what we already ask of every bottle: fruit picked at the right moment, milled without delay, and bottled honestly.
A Luxury Napa Valley Olive Oil Gift with Estate Provenance
Extra virgin olive oil this specific makes an unusually good gift, in part because it comes with a story to tell. A bottle of Marciano Estate EVOO is not just an ingredient. It is a grove in St. Helena, a harvest day timed to the hour, and a mill that never lets the fruit wait.
For the holidays, for a hostess, for a client who already has everything, an estate-grown, organic, award-winning olive oil offers something a gift card cannot: provenance. Pair it with a favorite Marciano wine, or send it on its own alongside a note about the harvest behind it.
Bring Home Marciano Estate Organic Napa Valley Olive Oil
Experience the character of Marciano Estate’s organic extra virgin olive oil from the Napa Valley harvest. Each bottle reflects our St. Helena estate, sustainable farming practices, and a same-day milling process designed to preserve the integrity of the fruit. Explore our premium Napa Valley olive oils and bring a piece of the estate to your table.
Frequently Asked Questions About Our Olive Oil Process
What Makes Marciano Estate Olive Oil Different From Other Napa Valley Olive Oils?
Why Is Same-Day Milling Important for Extra Virgin Olive Oil?
What Is the Olive Oil Milling Process?
References
- Olive Oil Times, “Northern Hemisphere’s Best Extra Virgin Olive Oils Revealed,” May 14, 2024, oliveoiltimes.com/world/northern-hemispheres-best-extra-virgin-olive-oils-revealed/131493
- California Olive Oil Council, “Marciano Estate,” cooc.com/marciano-estates/