The Olive Crosses the Atlantic to the Americas

The olive is so tied to the Mediterranean that it is easy to forget it is an immigrant everywhere else. It crossed the Atlantic in the sixteenth century in Spanish hands, carried as cuttings and seed alongside vines and wheat — the staples a Catholic colony could not do without.

Every olive tree in the Americas descends from an immigrant. The plant is native to the Mediterranean basin and the Levant, and it reached the New World only because Spanish colonists needed it badly enough to carry it across an ocean. The story of how it travelled — and how narrowly it survived — is a good deal more precarious than the sprawling groves of modern California or Argentina suggest.

Why Spain brought the tree

The first motive was not cuisine but the altar and the table. Olive oil was needed for cooking, for lamps and for the sacraments; the Church required it. Rather than ship every drop across the ocean, the Spanish crown wanted groves in the colonies. Cuttings travelled to the Caribbean first, where the tropical climate defeated them, then south to Peru, where they finally thrived in the dry coastal valleys. The best-known planting is Lima’s: around 1560 the settler Antonio de Rivera is said to have brought olive saplings from Seville, of which only a few survived the voyage — and from that tiny stock a whole South American olive culture eventually grew.

Where it took and where it didn’t

The olive is fussy. It wants long dry summers, mild winters and a real cold spell to set fruit — the Mediterranean climate, in short. The tropics killed it; the right valleys of South America suited it perfectly. From Peru the tree spread down the dry Pacific coast into what is now Chile and Argentina. Spain, protecting its own oil exports, at times discouraged colonial production, but the trees were already in the ground and quietly multiplying. Much later, from 1769, Franciscan missionaries carried the olive north into Alta California, planting it at Mission San Diego de Alcalá and the missions that followed — the origin of the ‘Mission’ olive still grown there today.

The narrow gene pool nobody mentions

Here is the part the romantic story leaves out. Because so few cuttings survived each leg of the journey, many old New World groves trace back to a startlingly small founding stock — a handful of trees, in some accounts. That makes the lineage narrow but deeply adapted: centuries of local selection in Peruvian and Chilean valleys produced table olives noticeably bigger and softer than their Spanish ancestors. They are not a different species, just a long experiment in a new home. Buy them as their own thing, rather than judging them against the Mediterranean originals.

Reading a New World olive

• Every American olive is an immigrant — there are no native New World olives.
• The tree needed a Mediterranean climate; it died in the tropics and thrived in dry coastal valleys.
• Many old groves descend from a tiny founding stock of surviving cuttings.
• South American table olives are often bigger and softer — local selection, not a different species.
• California’s Mission olive traces directly to the Franciscan mission plantings.

The olive in the Americas: common questions

Drawn from standard histories of the Spanish colonial introduction of the olive to Peru, Chile, Argentina and the California missions.