Sativa seeds come with more vocabulary attached than any other kind of cannabis seed, and most of it means a certain thing to a botanist, something else to a breeder and something different again to the grower trying to make a decision in front of the pack. A disappointing sativa grow nearly always goes back to a word that was read in the wrong sense: a flowering time taken as a promise, a “sativa-dominant” tag read as a description of character, a landrace bought like it were a tent-bred hybrid. The entries below are put together with the range at https://hazesativaseeds.com open for reference, since it leans strongly towards the long-flowering end of the spectrum and that is where the vocabulary carry the most weight most; the definitions though apply to any sativa seed from any seller. They are in no special order, because not one of them is usable without the rest.
Stretch (the doubling)
The surge of vertical growth that comes after the change to flowering. Most tent-bred plants add around half again; sativas routinely double, and a few equatorial types triple. The stretch continues three to five weeks and will not be halted after it has started, only redirected by training.
In tent terms, a stretch multiplier is a number worth read before deciding when to flip. A sativa flipped at sixty centimetres centimetres inside a standard tent is touching the lamp by week four of flower; one switched at thirty centimetres centimetres has room. People moving from indica stock almost always flip far too late the first time, and the lesson is visible on the ceiling of the tent.
Landrace versus heirloom
A population of plants adapted over centuries to one place by the local climate and climate alike, and not by modern breeding. Colombian, Colombian, Congolese and Oaxacan lines are the classic sativa cases. A landrace is a spread, rather than a single plant: inside a pack the heights, finishing times and smells range far more than a tent-bred hybrid, and that spread is the whole value of keeping one.
The trap is buying a landrace like a finished product. It carries habits that make sense in an equatorial field, including height no tent can hold and a flowering rhythm set to an daylength the majority of growers cannot provide. “Heirloom” on a listing usually refers to a landrace that has been reproduced away from its origin over some generations, typically with light selection for tent conditions; it is nearer to usable but still not uniform. A shop listing “landrace” that does not give an origin point and a reproduction history is applying the word as a flavour, and the seeds should be priced accordingly.
Latitude
The single number that decides whether a sativa will ripen outdoors, and one no pack prints. Long-flowering plants need a run of shortening days to continue late enough for the plant finish; in high latitudes the frost arrives first, and the grower cuts an unripe plant in late October or else watches it rot in November. The closer to the equator, within a northern hemisphere, the longer the window runs, and Mediterranean and low-latitude gardens can finish plants that northern growers never will.
The practical rule for a seed listing: an “outdoor” sativa harvest date is stated for the breeder’s own latitude, usually somewhere within southern Europe or the western United States, and each step north of that pushes the date later into the frost. A grower north of roughly the fiftieth parallel that is after a long-flowering sativa outdoors needs to be shopping for an autoflower or a covered space, not a better summer.
Sativa-dominant
A catalogue term rather than a botanical one. It usually means that more of a hybrid’s lineage are classed as sativa by the breeder who drafted the listing, and sometimes signals nothing more than that the buds are airier or the smell sharper than the that breeder’s indica-labelled lines.
The experience people connect with a word, clear-headed instead of heavy, is governed far more by terpene chemistry and the cannabinoid content than by the sativa fraction, and a good number of “sativa-dominant” releases deliver a heavy couch effect while a good number of the opposite stock deliver exactly the opposite. For a buyer the percentage is worth something as a rough guide to growth habit, flowering time and stretch; as a guide to how it feels it is close to useless without the terpene description.
Terpinolene
A aromatic compound found in high proportion in many classic sativa strains and responsible for much of the thing growers mean as a “sativa” smell: fresh, piney, lemon and slightly floral at once. It is volatile, driven off quickly by fast drying, and it fades faster during storage than the earthier terpenes which lead most tent stock.
To a seed buyer the word does two things. When a listing names terpinolene among the lead terpene, the line most likely carries real Haze-era ancestry whatever the label claims. And when the grower wants that profile to survive to the jar, the cure has to be cool and slow; a warm dry flattens a terpinolene line to something that tastes of hay and leaves nothing of what the pack promised.
Haze (the family, not the smell)
Originally a specific family of plants bred in coastal California from Colombian, Thai and Thai landraces, and later preserved and refined in the Netherlands. A true Haze grows tall, fills out sparsely, flowers for twelve to sixteen weeks and carries a scent of incense, pine and a note metallic that no other other line quite reproduces.
In its second sense “Haze” is whatever hybrid which carries some of that family, which today is a great many of the sativa-leaning catalogue. A listing which says “Haze” and gives no lineage could be mostly percent the classic family or one small fraction of it, and the flowering character follows the share, not the name. The useful question is not “is it a Haze” but “how much, and via which parent”.
Foxtailing (and when it is not a fault)
The habit of certain flowers to grow new calyx clusters on top of existing ones, giving towered, open buds rather than round ones. In most indica-leaning strains it is a heat symptom, usually from light too close or a room that is too high, and the advice is to fix the cause.
In a good number of sativas, especially Thai and some Haze lines, it is genetic and is going to occur under a flawless room. A first-time sativa grower frequently spends weeks hunting a problem that was never not a problem, dropping lights and temperatures and delaying an already long plant further. The breeder seldom says which kind to expect; the parentage usually does.
Equatorial (the twelve-hour problem)
Describes lines out of latitudes where daylength hardly varies across the year, and where the plant never evolved a sharp response to changing days. These lines frequently flower slowly under a standard twelve-hour schedule, because twelve hours is, to them, a mild ordinary day rather than a signal.
The working response, passed down between sativa growers over decades, is to shorten the light further: eleven hours, sometimes ten, especially in the final weeks. It costs some yield yield and gains a more clearer end. A listing which says “equatorial” is warning you about this with one word, and a grower who reads it as mere origin has missed the point hidden in it.
Flowering time (and what it is counted from)
The number of weeks between the start of flowering and harvest, and the single most misread figure on a sativa pack. With photoperiod seed it is counted from the day the light drops to twelve hours, rather than from sowing, so a “fourteen-week” sativa started with a eight-week vegetative stage is a five-month plant. Breeders also quote the optimistic end of the range, since the longer end moves less seed.
Sativa lines take everywhere from ten weeks to well over twenty, and the slowest line in the Haze Sativa Seeds range comes in at around 16 weeks from the flip. The catalogue can be sorted by this figure, which is the reasonable first step for a grower on a fixed schedule. A grower who adds four weeks on top of whatever the pack says is rarely disappointed.
Hermaphroditism in long-flowering lines
The appearance of male flowers on a female plant, typically towards the end in flower and often under stress. Every cannabis line has some capacity for it; sativa plants express it more, and the reason is one simple one: sixteen weeks of flower is fourteen weeks of exposure for a timer leak, a temperature spike or a missed watering that can set it off, and a old plant has gone past its intended finish often produces a few late male flowers on its own as a last attempt to make seed.
Not one of these means a sativa strain weak by nature; it makes the room’s discipline matter over a longer stretch. A sealed room, steady temperatures and harvesting the moment the plant is done and not two week later take away most of the risk. A listing which mentions a breeder tests parents for hermaphrodite traits is worth more for a long-flowering line than for anything else.