Sativa seeds arrive with more jargon attached than any other kind of cannabis seed, and most of it says a certain thing to a botanist, something else to a seed company and something different again to the person trying to make a decision in front of the pack. A disappointing sativa grow usually goes back to a word that was understood in the wrong one of those senses: a flowering time read as a promise, a « sativa-dominant » tag taken as a statement of character, a landrace chosen like it were a tent-bred hybrid. The entries below were put together with the range at https://hazesativaseeds.com to hand as the concrete examples, since it runs heavily towards the long-flowering end of the category where the vocabulary carry the most weight most; the meanings though apply to any sativa seed from any shop. They are in no special order, because none of them makes usable without the rest.
Sativa-dominant (the label)
A catalogue term rather than a measurable one. The phrase usually indicates that more of a hybrid’s parents are classed as sativa according to the breeder who drafted the description, and sometimes means no more than a certain the flowers are airier or the aroma brighter than the that breeder’s indica-labelled releases.
The experience people associate with a word, lively rather than sedating, is driven more by terpene chemistry and by cannabinoid content than it is by ancestry, and a good number of « sativa-dominant » releases deliver a flat couch effect while plenty of indica-labelled stock do exactly the opposite. To a buyer the label is worth something for a loose guide to growth habit, flowering time and stretch; as a predictor to effect it is close to useless unless accompanied by the aroma notes.
Haze (the family, not the smell)
Originally a particular line of plants bred in 1970s California from Mexican, Colombian and Thai landraces, and later preserved and worked in the Netherlands. The Haze grows tall, branches openly, takes for twelve sixteen weeks and smells of spice, citrus and something sharp that no line quite reproduces.
In its second sense « Haze » is whatever hybrid that contains some of that family, and by now is most of the sativa-leaning market. A listing that says « Haze » without lineage could be eighty percent original old family or a small fraction of it, and the grow time tracks the share, not the name. The working question is not « is it a Haze » but « how much, and through which parent ».
Intersex tendency
The appearance of pollen-bearing flowers on a female plant, usually late in flower and often in response to stress. Every cannabis population has some capacity to do; long-flowering lines express it more often, for a plain one: fourteen weeks of flower is fourteen weeks of exposure for a light leak, a heat spike or a late watering that can trigger it off, and a old plant has waited beyond its natural finish frequently produces a few desperate pollen sacs on its own as a last effort to make seed.
None of this means a sativa line unstable as a matter of nature; it means the room’s discipline count over a longer stretch. A sealed room, stable temperatures and harvesting when the plant is done and not two weeks later take away the greater part of the problem. A listing that states the breeder tests parents for hermaphrodite traits is saying something more for a sativa than on anything else.
Equatorial
Refers to lines from latitudes where daylength hardly changes through the year, and that the plant does not evolved a sharp reaction to changing days. These plants often flower slowly at a standard twelve-hour light cycle, since twelve hours is, for them, a mild ordinary day and not a signal.
The working fix, passed around between sativa growers for decades, is to shorten the light further: eleven hours, occasionally ten, especially during the last weeks. It loses some little yield and buys an more clearer end. A listing that says « equatorial » is telling you this in one word, and a grower that takes it as mere origin has missed the instruction hidden in it.
Landrace versus heirloom
A population of plants shaped over generations to a particular region by the local growers and climate alike, rather than by deliberate selection. Thai, Colombian, Malawian and Mexican lines are the classic sativa cases. A landrace is a spread, rather than a single plant: within a pack the flowering times, flowering times and aromas range far more than in a tent-bred hybrid, and that spread is the point of growing one.
The trap is treating a landrace like a modern product. It brings traits that make sense in an open field, such as height no tent can contain and a flowering rhythm set to a daylength most growers cannot provide. « Heirloom » in a listing usually refers to a landrace that has been reproduced somewhere for some generations, typically with light selection towards indoor life; it is nearer to usable but nonetheless far from uniform. A shop listing « landrace » that does not give a collection region and a reproduction history is applying the word loosely, and the pack should be priced accordingly.
Flowering time (and what it is counted from)
The number of weeks from the onset of flowering and harvest, and the one most frequently misunderstood figure on a sativa pack. With photoperiod seed it is counted from the day the light is cut to twelve hours, not from germination, so a « fourteen-week » sativa grown after an ordinary vegetative period is a twenty-two-week plant. Breeders also quote the shorter end of the range, because the other end sells fewer seed.
Sativa lines run anywhere 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 switch. The catalogue can be sorted by that figure, which is a reasonable first step if you have a grower with a fixed timetable. A grower who adds four weeks on top of whatever the pack says is seldom caught out.
Terpinolene
A aromatic compound present in large amounts in many old sativa strains and responsible for much of what people describe as the « sativa » smell: green, piney, lemon and faintly sweet at once. It is volatile, lost quickly through fast drying, and terpinolene degrades faster during storage than the heavier terpenes which lead indica-leaning lines.
To a seed buyer the name earns two jobs. When a listing names terpinolene as the lead terpene, the strain most likely carries real old-sativa genetics whatever the label claims. And where the grower wants that profile to still be there by the jar, the cure is going to be slow and slow; a warm dry turns a terpinolene line to a flower that smells of hay and leaves nothing of what the pack promised.
Stretch (the doubling)
The burst of upward growth that comes after the switch to flowering. Indica-leaning plants gain around half again; sativas routinely double, and a few landrace lines triple. The stretch lasts two to four weeks and will not be stopped after it begins, only bent sideways by training.
In tent terms, the stretch multiplier is the fact to read before deciding when to switch. A sativa flipped at sixty centimetres centimetres inside a standard tent is at the lamp by week four of flower; one flipped at thirty centimetres centimetres has room. People coming from indica stock nearly always switch far too late the first time, and the consequence is visible on the ceiling of the tent.
Latitude (outdoor sativas)
The one figure that determines whether a sativa can ripen outdoors, and a number no pack states. Equatorial lines need a autumn days to continue long enough for the plant ripen; at high latitudes the frost arrives before that, and the grower cuts a half-finished plant in late October or watches it rot in November. The further south, within the northern hemisphere, the later the window runs, and Mediterranean and low-latitude growers are able to ripen plants that temperate growers cannot.
The usable reading for a seed pack: an « outdoor » line finishing date is stated for the breeder’s home latitude, normally somewhere in southern Europe or the western United States, and each step north of that pushes the finish back towards the frost. A grower north of roughly the fiftieth parallel who wants a long-flowering sativa outdoors needs to be shopping for a sativa autoflower or else a greenhouse, and not a longer summer.
Foxtailing (and when it is not a fault)
The habit of certain flowers to push out new calyx clusters on top of existing ones, giving towered, irregular buds instead of dense ones. In the majority of indica-leaning lines it is a stress response, typically from light too close or a room too high, and the standard response is to correct the cause.
In many sativas, especially Thai and some Haze hybrids, it is built in and is going to occur in a flawless room. A first-time sativa grower often spends a month hunting a fault that is a problem, dropping lights and heat only delaying an already long plant further. The listing seldom says which type to expect; the lineage generally does.