Origins of Haze: The Story Behind the Strain

"Before Haze was a strain, it was a habit: a small group of growers in Santa Cruz crossing whatever good seed they could find, season after season."

Haze is one of those rare cannabis names that has outlived almost every other strain of its era. It started life on the California coast in the late 1960s and early 1970s and went on to become a reference point for an entire category of plants. To understand where Haze came from is to understand how modern cannabis genetics were quietly invented in back gardens and rented greenhouses, long before there was an industry to speak of.

A Californian beginning

The origin story most commonly told places Haze in Santa Cruz, California, sometime around 1969 to 1973. Two brothers — usually referred to in cannabis literature simply as the Haze Brothers — are credited with the work, though their full identities have always been kept quiet. They were not scientists. They were enthusiasts with a good climate, a patient eye and access to seed brought back from international travel.

California in those years was unusually well placed for a project like this. Seed travelled with anyone who did. Mexican, Colombian, Thai and South Indian landraces all passed through the region, and a curious grower could line several up in a single season. The Haze Brothers crossed what they had and selected for the qualities they liked: long, energetic flowering, a tall airy structure, and an aroma that was sweet and sharp rather than dense and skunky.

What "Haze" actually refers to

It is worth being precise: "Haze" was never a single fixed plant. It was a working line — a population of seedlings selected across multiple generations from a rotating cast of landrace parents. Different harvests of original Haze would have varied noticeably from one another, and that variation is part of the reason later breeders found so much to work with.

The most frequently cited parental contributions are a Mexican sativa, a Colombian Gold, a South Indian and a Thai. Whether all four were always present, or whether different "batches" of Haze leaned on different parents, is one of those questions that cannot be answered cleanly. The honest answer is that Haze was a moving target from the start, and the people doing the work were not keeping breeding journals for posterity.

From Santa Cruz to Amsterdam

By the late 1970s, original Haze seed had reportedly found its way to the Netherlands, carried by a small handful of travellers connected to the early Dutch coffee shop scene. There it landed in the hands of breeders who would, in the following decade, build the first generation of professional cannabis seed banks. They recognised quickly what they had: a tropical-leaning sativa that struggled to fit into a Dutch greenhouse but that, when crossed with shorter, faster, hardier indica genetics, produced offspring of unusual quality.

Almost every "classic" Dutch sativa lineage from the 1980s and 1990s carries some fraction of Haze. The plant that arrived from California became the genetic spine of an entire commercial industry, even as the original line itself was rarely sold or smoked in its purest form.

Why folklore matters here

Cannabis history is unusually thick with folklore. For most of the period covered by Haze's origin story, the plant was illegal in nearly every country where it was grown, written about or smoked. There were no public registries, no patents, no peer review. Stories were passed grower to grower, sometimes embellished, sometimes simplified, sometimes contradicting one another flatly. We have flagged in this article where the record is thin. Other accounts of Haze emphasise different growers, different parental landraces or different timelines. Where the disagreement is genuine, we have said so.

The aesthetic legacy

The aroma profile most often associated with Haze — citrus, incense, pine resin, a faint sweetness sometimes described as "spiced perfume" — has become almost a shorthand for sativa character itself. Plants that smell nothing like a true Haze are routinely labelled "hazey" in modern catalogues, which is both a testament to the original's influence and a small frustration for purists. The shape, too — tall, with long internodes and slim, elegant flowers — became the template for what people in the trade still call a "classic sativa structure".

Where to go next

If you want to follow the lineage forward, read The Haze Family Tree for the crosses and descendants that came out of the early Dutch seed bank era. For a wider view of the cultural moment, see The History of Haze: From Santa Cruz to the World.