Sativa seeds arrive with more jargon attached than any other category of cannabis seed, and most of it means one thing to a botanist, something else to a breeder and a third to the grower trying to make a decision in front of the listing. A failed sativa grow nearly always traces back to a word that was read in the wrong one of those senses: a flowering time read as a promise, a “sativa-dominant” tag read as a statement of effect, a landrace chosen as if it were a modern hybrid. The entries below were written with the range at https://hazesativaseeds.com open as the concrete examples, since it runs heavily to the long-flowering end of the category and that is where the vocabulary matter most; the meanings though apply to any sativa seed from any shop. They are in no special order, since not one of them makes usable on its own without the others.

Terpinolene

A aromatic compound present in high proportion in a lot of old sativa lines and accounting for most of what people mean as the “sativa” smell: fresh, woody, citrus and faintly floral at once. It is volatile, driven off easily through fast drying, and it degrades faster in storage than the heavier terpenes which dominate indica-leaning lines.

To a seed buyer the word does two things. Where a listing names terpinolene as the lead aromas, the strain probably has substantial Haze-era genetics regardless of what the label claims. And when the you are after that profile to still be there by the jar, the drying has to be cool and slow; a warm drying room turns a terpinolene sativa into a flower that smells of very little and leaves nothing of what the pack described.

Intersex tendency

The appearance of male flowers on a female plant, typically towards the end in flower and frequently under stress. Every cannabis line carries some capacity to do; long-flowering plants express it more often, for one simple reason: sixteen weeks of flower is fourteen weeks of opportunity for a timer leak, a heat spike or a missed watering that can set it off, and a plant that has waited past its intended end frequently throws a few late pollen sacs on its own as a final attempt to make seed.

None of this makes a sativa strain weak by nature; it makes the grower’s consistency count over longer. Light-tight room, stable temperatures and harvesting the moment the plant is done and not two weeks after take away most of the risk. A listing that mentions the breeder tests parents for intersex traits is saying something worth hearing on a long-flowering line than on any else.

Landrace

A population of plants shaped over centuries to a particular region by the local climate and climate together, and not by deliberate selection. Colombian, Thai, Congolese and Mexican stock are the sativa cases. A landrace is a spread, rather than a one plant: inside a pack the heights, flowering times and aromas range widely than in any tent-bred line, and that spread is the point of growing one.

The trap is buying a landrace like a modern hybrid. It brings traits that made sense in an equatorial field, including height that no tent can contain and a flowering clock set to a daylength most growers never offer. “Heirloom” in a listing usually means a landrace that has been reproduced somewhere for a number of generations, typically with a degree of selection for tent conditions; it is nearer to manageable but nonetheless not uniform. A shop offering “landrace” that does not give a collection point and a generation history is using the word as a flavour, and the pack should be judged with that in mind.

Foxtailing (and when it is not a fault)

The tendency of certain flowers to grow fresh calyx growth on top of existing ones, producing spired, irregular buds instead of dense ones. In most tent-bred lines it is a stress response, usually caused by light that is too close or a room that is too high, and the standard response is to correct the room.

In many sativas, above all Southeast Asian and certain Haze hybrids, it is genetic and is going to happen under a flawless room. A first-time sativa grower often spends weeks chasing a problem that is not there, lowering lights and temperatures and slowing a slow flower even more. The listing rarely says which type to expect; the parentage usually tells you.

Sativa-dominant (the label)

A marketing category rather than a botanical one. The phrase generally means that the larger share of a hybrid’s parents are classed as sativa by the breeder who wrote the listing, and occasionally means no more than a certain the buds are longer or the smell brighter than the that breeder’s indica-labelled lines.

The effect people connect with the word, lively instead of heavy, is driven more by terpene chemistry and the cannabinoid content than it is by the sativa fraction, and a good number of “sativa-dominant” releases produce a flat sleepy result and plenty of the opposite stock deliver exactly the reverse. To a grower the label is useful for a rough hint to growth habit, flowering time and stretch; for a predictor to effect it is next to useless without the terpene notes.

Haze (the family, not the smell)

Originally a particular line of plants put together in coastal California from Mexican, Thai and South Indian landraces, and later kept and refined in the Netherlands. The Haze runs tall, branches openly, takes for twelve to to sixteen weeks and carries a scent of incense, citrus and a note sharp that no other line quite reproduces.

In its second sense “Haze” is whatever hybrid that contains some of that family, which today is a great many of the sativa-leaning catalogue. A listing which reads “Haze” and gives no lineage could be mostly percent original classic family or a small fraction of it, and the flowering time tracks the share, not the name. The useful question is never “is it a Haze” but “how much, and through which parent”.

Flowering time (and what it is counted from)

The figure of weeks from the onset of flowering and maturity, which is the single most misread number on a sativa pack. For photoperiod seed it is measured from the day the light is cut to twelve hours, rather than from germination, so a “fourteen-week” sativa grown with a ordinary vegetative period is a five-month plant. Breeders also give the shorter end of a spread, because the other end sells less seed.

Sativa plants run everywhere from ten weeks to well over twenty, and the longest line in the Haze Sativa Seeds range comes in at about 16 weeks after the flip. The catalogue can be sorted by that number, which is the sensible first pass for a room with a tight schedule. A grower who allows four weeks to whatever the pack states is rarely caught out.

Stretch (the doubling)

The surge of upward growth which comes after the switch to flowering. Indica-leaning plants add half again; sativas commonly double, and some landrace types go further. The stretch continues three to four weeks and will not be stopped after it begins, only redirected by training.

In tent terms, the stretch figure is a fact worth reading ahead of choosing when to flip. A sativa flipped at sixty centimetres centimetres in a standard tent is touching the lamp before week four of flower; one flipped at thirty centimetres has room. People coming from indica stock nearly always flip too late the first time, and the consequence is visible on the ceiling of the tent.

Latitude

The one figure that decides if a sativa can finish outdoors, and a number that no pack prints. Equatorial lines require a run of shortening days to go on long enough to let the plant finish; at high latitudes the frost comes first, and the grower cuts a unripe plant in the end of October or else watches it to mould in November. A closer south, in the northern hemisphere, the later the window stretches, and coastal or subtropical gardens are able to ripen plants that temperate gardens never will.

The usable rule for a seed listing: an “outdoor” line harvest date is stated for the breeder’s home latitude, normally somewhere within southern Europe or the western United States, and every step north of that moves the finish back into the weather. A grower above roughly the fiftieth parallel that wants a long-flowering sativa outdoors is looking for a sativa autoflower or else a greenhouse, and not a longer season.