Sativa seeds arrive with more jargon attached than any other kind of cannabis seed, and most of it says one thing to a botanist, something else to a breeder and something different again to the person trying to make a decision in front of the listing. The failed sativa grow usually traces back to a word that was read in the wrong sense: a flowering time read as a promise, a “sativa-dominant” tag taken as a description of effect, a landrace chosen as if it were a modern hybrid. The entries below are written with the range at https://hazesativaseeds.com to hand for reference, because it runs heavily to the long-flowering end of the spectrum and that is where the words matter most; the definitions themselves apply to any sativa seed from any shop. They are given in no particular order, since not one of them makes sense on its own without the rest.
Equatorial (the twelve-hour problem)
Describes lines out of regions in which daylength hardly varies through the year, which means where the plant never develop a strong reaction to shortening days. These lines frequently flower reluctantly under a conventional twelve-hour light cycle, since twelve hours is, to them, a mild ordinary day rather than a signal.
The working fix, passed around between sativa growers over decades, is to cut the light more: eleven hours, occasionally ten, particularly in the last weeks. It loses a little yield and gains a more clearer end. A listing that uses “equatorial” is telling you about this with one word, and a grower that takes it as mere origin misses the point hidden in it.
Sativa-dominant
The marketing term rather than a botanical one. It usually means that more of a hybrid’s lineage are described as sativa according to whoever drafted the description, and occasionally signals no more than that the buds are longer or the aroma sharper than the same breeder’s other lines.
The effect people associate with a word, lively rather than heavy, is governed more by terpene chemistry and the cannabinoid balance than by the sativa fraction, and plenty of “sativa-dominant” releases produce a flat couch result while a good number of the opposite stock deliver exactly the opposite. To a buyer the percentage is useful as a loose hint to growth habit, flowering time and stretch; as a guide to effect it is next to useless unless accompanied by the terpene notes.
Terpinolene
A aromatic compound present in high amounts in a lot of old sativa strains and responsible for most of what growers mean as a “sativa” smell: fresh, piney, lemon and slightly sweet at once. It is volatile, lost quickly by hot drying, and it degrades more quickly during storage than the heavier terpenes which dominate indica-leaning lines.
For a seed buyer the name earns two things. When a listing names terpinolene among the lead terpene, the line most likely has substantial old-sativa genetics regardless of what the label says. And where the you are after that profile to survive by the jar, the drying has to be slow and slow; a fast dry flattens a terpinolene sativa into a flower that tastes 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 often in response to stress. Every cannabis line carries some capacity to do; sativa lines express it more often, for a plain one: fourteen weeks of flower is fourteen weeks of exposure for a timer leak, a temperature spike or a late watering that can trigger it going, and a old plant has already waited past its natural end frequently throws a few desperate male sacs on its own in a final attempt to make seed.
None of this means a sativa line weak as a matter of course; it makes the room’s consistency count for a longer stretch. Light-tight room, stable conditions and cutting when the plant is ready rather than a week later take away most of the risk. A listing that states a breeder tests parents for intersex tendency is saying something more on a long-flowering line than on any else.
Latitude
The single number that determines if a sativa can finish outdoors, and a number no pack states. Equatorial plants need the run of shortening days to go on late enough for the plant to ripen; in high latitudes the frost comes before that, and the grower harvests a unripe plant in late October or loses it to mould in November. The closer to the equator, within the northern hemisphere, the longer the season stretches, and Mediterranean or low-latitude growers are able to finish lines that northern growers never will.
The practical reading for a seed listing: an “outdoor” sativa finishing month is given for the breeder’s own latitude, normally a point in temperate Europe or the western United States, and each step north of that pushes the date back into the frost. A grower above about the fiftieth parallel that is after a true sativa outdoors is shopping for an autoflower or a covered space, not a better summer.
Foxtailing (and when it is not a fault)
The habit of certain flowers to push out fresh bud clusters on top of old ones, producing towered, open buds rather than round ones. In most indica-leaning strains it is a heat response, usually caused by light that is too close or a room that is too high, and the advice is to fix the room.
In many sativas, above all Thai and certain Haze lines, it is built in and is going to happen under a flawless room. A new sativa grower frequently wastes a month hunting a problem that was never not a problem, dropping lights and temperatures and slowing an already long flower even more. The listing seldom says which kind to expect; the parentage generally tells you.
Stretch (the doubling)
The burst of vertical growth which comes after the switch to flowering. Indica-leaning plants add around half again; sativas commonly double, and some landrace lines go further. The stretch lasts three to five weeks and will not be halted after it has started, only bent sideways by training.
In tent terms, the stretch multiplier is a number worth read before deciding when to flip. A sativa switched at sixty centimetres centimetres inside a standard tent is touching the lamp before week four of flower; one switched at thirty centimetres has room. Growers coming over from indica strains almost always flip far too late the first time, and the consequence is written on the ceiling of the tent.
Haze (the family, not the smell)
In its first sense a particular family of plants put together in coastal California from Mexican, Thai and South Indian parents, and then preserved and refined in the Netherlands. A true Haze grows tall, branches openly, flowers for twelve sixteen weeks and carries a scent of incense, pine and a note metallic that no other other line exactly reproduces.
In its second sense “Haze” is any cross that carries some of that family, which by now is most of the sativa-leaning catalogue. A listing that reads “Haze” and gives no lineage could be eighty percent the old family or one small fraction of it, and the flowering time follows the share, not the name. The useful question is never “is it a Haze” but “how much, and through which parent”.
Landrace versus heirloom
A population of plants shaped over centuries to one region by local climate and growers alike, and not by deliberate selection. Colombian, Colombian, Malawian and Oaxacan lines are the sativa cases. A landrace is a spread, rather than a single plant: inside a pack the heights, finishing times and aromas spread far more than in a tent-bred hybrid, and that spread is the whole value of keeping one.
The mistake is treating a landrace as a finished hybrid. It carries habits that made sense in an equatorial field, including height that no tent can contain and a flowering rhythm tuned to a equatorial daylength most growers cannot offer. “Heirloom” on a listing usually refers to a landrace that has been reproduced somewhere over some generations, typically with light selection for tent conditions; it is nearer to manageable but still not uniform. A seller listing “landrace” that does not give a collection region and a reproduction count is using the word loosely, and the pack should be judged with that in mind.