Sativa seeds come with more vocabulary attached than any other category of cannabis seed, and most of it says a certain thing to a botanist, another to a seed company and a third to the person trying to make a decision in front of the pack. A failed sativa grow usually goes back to a word that was understood in the wrong one of those senses: a flowering time taken as a fixed number, a “sativa-dominant” label taken as a description of character, a landrace bought like it were a tent-bred hybrid. The entries below were written with the range at https://hazesativaseeds.com to hand for reference, because it leans strongly to the classic end of the category and that is where the vocabulary matter most; the meanings themselves hold to any sativa seed from any seller. They are given in no particular order, because not one of them makes usable on its own without the rest.
Sativa-dominant
The marketing term rather than a measurable one. It usually indicates that more of a hybrid’s parents were classed as sativa by the breeder who wrote the listing, and occasionally means nothing more than a certain the buds are longer or the aroma sharper than the same breeder’s other lines.
The experience people connect with the word, clear-headed instead of heavy, is governed more by terpene profile and the cannabinoid content than it is by the sativa fraction, and plenty of “sativa-dominant” releases deliver a flat sleepy effect while plenty of the opposite lines deliver the opposite. For a buyer the percentage is useful for a loose guide to growth habit, flowering time and stretch; for a guide to effect it is next to worthless unless accompanied by the aroma description.
Stretch (the doubling)
The burst of upward growth which follows the switch to flowering. Indica-leaning plants add around half again; sativas commonly double, and some equatorial types go further. The stretch lasts three to four weeks and cannot be stopped once it has started, only bent sideways by training.
In practical terms, the stretch multiplier is the number worth read ahead of deciding when to flip. A sativa flipped at sixty centimetres in a standard tent is at the lamp before week four of flower; one flipped at thirty centimetres centimetres has room. Growers coming over from indica stock nearly always switch far too late the first time, and the lesson is written on the ceiling of the tent.
Latitude (outdoor sativas)
The one figure that decides whether a sativa can finish outdoors, and one no pack states. Long-flowering plants need a run of shortening days to go on long enough for the plant ripen; at high latitudes the frost arrives before that, and the grower cuts an half-finished plant in late October or else watches it to mould in November. The further to the equator, within a northern hemisphere, the longer the season runs, and coastal or low-latitude growers are able to ripen lines that northern gardens cannot.
The usable rule for a seed listing: an “outdoor” sativa finishing date is given for the breeder’s own latitude, normally somewhere in temperate Europe or the west coast of the United States, and each step north of that pushes the date later into the frost. A grower above about the fiftieth parallel who is after a true sativa outdoors is shopping for an autoflower or a covered space, and not a better season.
Intersex tendency
The appearance of male flowers on a female plant, typically towards the end in flower and frequently under stress. Every cannabis population carries a degree of capacity to it; long-flowering plants show it more often, and the reason is one plain one: 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 old plant has already waited beyond its natural end often throws a few desperate male sacs on its own as a last effort to make seed.
None of this makes a sativa line weak as a matter of course; it means the grower’s discipline matter over longer. Light-tight tents, stable temperatures and harvesting the moment the plant is ready and not two weeks later remove the greater part of the risk. A listing which states the breeder screens parents for intersex tendency is saying something worth hearing for a sativa than on any else.
Terpinolene
A terpene found in large amounts in many classic sativa lines and accounting for much of the thing people describe as a “sativa” aroma: green, piney, citrus and faintly floral at once. It is volatile, driven off easily by hot drying, and terpinolene degrades more quickly during the cure than the earthier terpenes that lead most tent stock.
To a seed buyer the name does two jobs. When a listing names terpinolene as the lead terpene, the line most likely carries substantial old-sativa ancestry whatever the percentage says. And where the grower wants that smell to still be there to the jar, the drying has to be slow and cool; a fast dry flattens a terpinolene line to a flower that tastes of hay and leaves no trace of what the pack promised.
Equatorial (the twelve-hour problem)
Describes plants out of regions in which daylength barely varies across the year, which means that the plant never develop a sharp reaction to changing days. Such lines frequently flower slowly at a standard twelve-hour schedule, because twelve hours is, for them, a mild ordinary day and not a signal.
The working fix, handed down between sativa growers for decades, is to cut the light further: eleven hours, occasionally ten, particularly during the final weeks. It loses a yield yield and gains a earlier clearer end. A listing that says “equatorial” is telling you about this with one word, and a grower who takes it as mere origin misses the instruction hidden in it.
Haze
In its first sense a specific family of plants bred in 1970s California from Colombian, Thai and South Indian landraces, and then kept and refined in the Netherlands. The Haze grows tall, fills out sparsely, flowers for twelve to sixteen weeks and carries a scent of incense, pine and something sharp that no line quite reproduces.
In its second sense “Haze” is whatever cross which contains some of that family, and by now is most of the sativa-leaning catalogue. A listing which says “Haze” and gives no lineage may be eighty percent the old family or one small fraction of it, and the grow character tracks the share, not the name. The working question is never “is it a Haze” but “how much, and through which parent”.
Foxtailing
The tendency of certain flowers to push out fresh calyx clusters on top of old ones, giving towered, irregular buds rather than dense ones. In the majority of indica-leaning lines it is a heat response, typically from light that is too close or a room that is too high, and the standard response is to fix the cause.
In a good number of sativas, especially Thai and certain Haze hybrids, it is built in and will happen under a perfect room. A new sativa grower often wastes weeks hunting a fault that is not there, lowering lights and heat and delaying an already long plant further. The breeder rarely warns which type you should expect; the parentage usually tells you.
Landrace
A population of plants shaped over generations to a particular place by local climate and climate together, and not by modern breeding. Colombian, Thai, Congolese and Mexican lines are the sativa cases. A landrace is a spread, not a single plant: inside a pack the heights, flowering times and aromas range far more than a tent-bred line, and this variation is the whole value of keeping one.
The mistake is treating a landrace like a finished product. It carries traits that make sense in an equatorial field, including a frame that no tent can contain and a flowering rhythm set to a daylength the majority of growers never offer. “Heirloom” in a listing usually means a landrace that has been reproduced away from its origin over a number of generations, often with a degree of selection for indoor life; it is nearer to usable but nonetheless not a hybrid. A shop offering “landrace” without an origin point and a reproduction count is applying the word as a flavour, and the pack should be priced with that in mind.