How Olives Are Grown in California: The Olive Growing Cycle from Tree to Harvest

Before olives become olive oil, they spend months growing on the tree through the olive growing cycle. From spring blossoms to summer fruit development and fall harvest, each stage shapes the flavor, quality, and character of the finished oil. Long before harvest, the foundation for exceptional olive oil is already set in the grove.

The best California olive oils are shaped not only by how they are pressed, but by how they are grown.

What Are Olives?

Olives are the fruit of the olive tree (Olea europaea), an evergreen species native to the Mediterranean that thrives in California’s similar Mediterranean climate. Although often mistaken for vegetables, olives are technically a fruit. Fresh from the tree, they are naturally firm and bitter and must be cured before eating.

Olive trees are long-lived and slow to mature. Most begin producing fruit within three to five years, reach full production around seven to ten years, and can remain productive for decades with proper care.

Why California Is Ideal for Growing Olives

California produces more than 95% of the olive oil made in the United States, thanks to a climate that closely mirrors the Mediterranean region where olive trees originated. Long, dry summers, mild winters, and well-draining soils create ideal conditions for healthy trees and high-quality fruit.

Among California's growing regions, Paso Robles stands out for its exceptional olive oil production. Warm days support fruit ripening, while cool nights help preserve balance, freshness, and complexity. Combined with attentive farming practices, these conditions consistently produce olives with strong flavor and high quality.

The Olive Growing Cycle, Stage by Stage

The olive growing cycle spans a full year, beginning with spring growth and ending with a carefully timed fall harvest. Each stage influences oil flavor, aroma, and nutritional composition, which is why no two harvests are ever the same.

1. Bud Formation

In late winter and early spring, flower buds begin to emerge as the olive tree comes out of dormancy. These buds determine the potential crop for the season.

2. Flowering

As temperatures warm, buds open into small white blossoms. Only a small percentage are pollinated successfully, and weather during this stage strongly influences final yield.

3. Fruit Set

Following pollination, young green olives begin to develop. Throughout summer, they grow in size and begin developing the compounds that will become olive oil.

4. Ripening

As summer turns to fall, olives transition from green to purple and black. During this stage, oil composition and flavor continue to evolve.

Greener fruit produces oils that are more grassy, bitter, and peppery. Riper fruit produces softer, rounder, fruit-forward oils. The final flavor depends on the balance at harvest.

5. Harvest

Harvest timing is not fixed by date. It is determined by the balance of green and ripe fruit, overall flavor development, and seasonal conditions.

At Pasolivo, every harvest is guided by the condition of the fruit rather than an arbitrary schedule, allowing each season to express its own unique character.

Polyphenols: The Natural Antioxidants in Olives

Polyphenols are naturally occurring antioxidants found in olives that contribute to both flavor and nutritional value in extra virgin olive oil.

Greener olives generally contain higher polyphenol levels, producing more robust, peppery oils. As olives ripen, polyphenol levels decrease, resulting in smoother, milder oils. Variety, climate, and harvest timing all influence final levels.

At Pasolivo, we highlight this natural variation rather than standardizing it. Our club-exclusive Olio Nuovo is released immediately after harvest, unfiltered and naturally rich in sediment. It typically reflects the highest polyphenol levels of the season and offers the most intense expression of fresh-pressed oil.

Inside the Pasolivo Ranch Olive Grove

Our olive grove is shaped by time, climate, and variety. Across more than 7,000 olive trees at our Paso Robles Ranch, including plantings over 35 years old, the orchard reflects both long-term maturity and seasonal change.

Olive trees naturally follow an alternate-bearing cycle, where a heavier crop one year is often followed by a lighter one the next as the tree restores balance. Rather than forcing consistency, we work with this rhythm through careful pruning, irrigation, and observation to support long-term tree health and stable production over time.

Because everything happens on a single estate, from growing through harvest, every decision is guided by one priority: capturing the most complete expression of the fruit each season produces.

What Olive Varieties Does Pasolivo Grow?

Pasolivo grows 12 traditional Mediterranean olive varieties across its single estate in Paso Robles. Each variety contributes distinct flavor, structure, and natural complexity to the grove and finished olive oil.

The Advantage of a Single-Estate Harvest

Olive harvest is not scheduled by date, but by the condition of the fruit itself. Each season, growers track how the olives are developing on the tree and harvest when flavor, color, and ripeness reach their ideal balance.

Timing is critical. Picked too early, olives produce oil that is sharp and undeveloped. Left too long, the fruit loses freshness and structure. The ideal moment shifts each year based on how the season unfolds.

Because Pasolivo is a single-estate producer, harvest decisions are made entirely in response to the grove. With no outside growers or external supply chains, picking can begin the moment the fruit reaches peak maturity. This allows the fruit to move directly from tree to production while still at its freshest point, preserving the character of the season in the final oil.

The Benefits of Traditional Hand-Harvesting

Every olive at Pasolivo is hand-harvested to protect both fruit and tree. Gentle hand-picking and raking remove olives without damaging the branches or bruising the fruit, preserving quality from the very start.

This approach also supports long-term orchard health. Thoughtful, hands-on care helps maintain balanced trees and sustained productivity season after season.

Experience the Olive Growing Season

Visit the Pasolivo Ranch in Paso Robles, California to see the grove in person, or follow along on our socials for our 2026 Orchard Update Series as the olive growing cycle unfolds throughout the year.

Each bottle of Pasolivo olive oil reflects a full season of growth in the grove, shaped by time, climate, and a single carefully chosen harvest moment. It carries the character of a specific place and year, preserved from tree to bottle.

Taste the single-estate California olive oil difference with Pasolivo.