Sativa seeds arrive with more jargon around them than any other kind of cannabis seed, and a good deal of it says a certain thing to a botanist, something else to a seed company and a third to the person trying to make a decision in front of the listing. A failed sativa grow nearly always traces back to a word that was understood in the wrong one of those senses: a flowering time read as a fixed number, a « sativa-dominant » tag taken as a description of character, a landrace bought like it were a modern hybrid. The entries below were written with the range at https://hazesativaseeds.com open for reference, because it runs strongly to the classic end of the spectrum where the vocabulary carry the most weight most; the meanings though hold to any sativa seed from any shop. They are in no particular order, since not one of them makes usable on its own without the rest.
Equatorial
Refers to plants from regions where daylength hardly varies across the year, and that the plant never evolved a sharp reaction to changing days. These plants often start flowering slowly at a standard twelve-hour light cycle, because twelve hours is, for them, an ordinary day rather than a signal.
The working response, handed down among sativa growers for decades, is to cut the light further: eleven hours, sometimes ten, especially in the final weeks. It loses a little yield and gains a more clearer end. A listing which uses « equatorial » is telling you this with one word, and a grower that reads it as mere geography has missed the point hidden in it.
Landrace versus heirloom
A population of plants adapted through centuries to one place by the local growers and climate alike, rather than by deliberate breeding. Thai, Thai, Malawian and Mexican stock are the classic sativa cases. A landrace is a spread, not a one plant: within a pack the heights, flowering times and smells spread widely than any tent-bred line, and this variation is the point of growing one.
The mistake is buying a landrace like a finished hybrid. It brings traits that made sense in an open field, including a frame no tent can hold and a flowering rhythm tuned to an daylength the majority of growers never provide. « Heirloom » on a listing generally means a landrace that has been reproduced away from its origin over a number of generations, typically with a degree of selection for tent life; it is nearer to usable but nonetheless far from uniform. A shop listing « landrace » without a collection region and a generation count is using the word loosely, and the seeds should be priced accordingly.
Flowering time (and what it is counted from)
The number of weeks between the start of flowering and harvest, and the one most misunderstood number on a sativa pack. With photoperiod seed it is counted from the day the light is cut to twelve hours, rather than from germination, so a « fourteen-week » sativa grown with an eight-week vegetative stage is a five-month plant. Seed companies also quote the optimistic end of a spread, since the longer end moves fewer seed.
Long-flowering plants run everywhere from ten weeks to more than twenty, and the slowest line in the Haze Sativa Seeds range is at about 16 weeks after the flip. The catalogue can be filtered by that number, which is a sensible first step if you have a grower on a tight timetable. A grower who adds four weeks to whatever the pack states is rarely disappointed.
Foxtailing (and when it is not a fault)
The habit of certain flowers to grow fresh bud clusters on top of existing ones, producing towered, open buds rather than round ones. In most tent-bred lines it is a heat symptom, typically caused by light too close or temperatures too high, and the standard response is to correct the cause.
In a good number of sativas, above all Southeast Asian and certain Haze hybrids, it is genetic and is going to happen under a flawless room. A new sativa grower often spends weeks chasing a fault that was never not a problem, dropping lights and heat only delaying an already slow plant further. The listing seldom warns which kind you should expect; the parentage generally tells you.
Latitude (outdoor sativas)
The single number that determines if a sativa will finish outdoors, and one no pack prints. Long-flowering lines need a autumn days to go on long enough to let the plant finish; in northern latitudes the frost comes before that, and the grower cuts a unripe plant in the end of October or else watches it rot in November. A further to the equator, within the northern hemisphere, the longer the window stretches, and Mediterranean and low-latitude growers can finish lines that temperate gardens cannot.
The practical rule of a seed pack: an « outdoor » sativa finishing month is stated for the breeder’s own latitude, normally a point in southern Europe or the western United States, and every step further north of that pushes the finish later into the frost. A grower above roughly the fiftieth parallel who wants a long-flowering sativa in the garden needs to be looking for a sativa autoflower or a covered space, not a better summer.
Terpinolene (the « sativa smell »)
A terpene found in large amounts in a lot of classic sativa lines and responsible for most of the thing growers describe as the « sativa » smell: fresh, piney, citrus and faintly floral at once. It is fragile, driven off quickly by fast drying, and terpinolene degrades more quickly in the cure than the heavier terpenes which lead most tent stock.
To a seed buyer the word does two jobs. When a listing lists terpinolene as the lead aromas, the strain most likely has real Haze-era ancestry regardless of what the label says. And where the you wants that profile to survive by the jar, the cure is going to be slow and cool; a warm dry flattens a terpinolene sativa into something that tastes of hay and nothing of what the pack promised.
Haze (the family, not the smell)
Originally a particular family of plants bred in 1970s California from Colombian, Thai and Thai parents, and then preserved and refined in the Netherlands. The Haze runs tall, fills out sparsely, takes for twelve to sixteen weeks and carries a scent of incense, pine and something metallic that no other other line quite has.
In its looser sense « Haze » is any cross which contains a share of that family, and by now is most of the sativa-leaning market. A listing which says « Haze » without parents could be mostly percent original classic family or one sixteenth of it, and the grow time tracks the fraction, not the name. The working question is never « is it a Haze » but « how much, and through which parent ».
Stretch (the doubling)
The burst of upward growth which follows the switch to flowering. Indica-leaning plants add around half their height again; sativas routinely double, and some landrace lines go further. The stretch continues two to five weeks and cannot be stopped after it has started, merely redirected by training.
In practical terms, the stretch figure is a number to read before choosing when to switch. A sativa switched at sixty centimetres in a two-metre tent is touching the lamp before week four of flower; one switched at thirty centimetres has room. People moving over from indica stock almost always switch far too late the first time, and the consequence is visible on the ceiling of the tent.
Sativa-dominant (the label)
A marketing category and not a measurable one. The phrase generally means that the larger share of a hybrid’s parents were classed as sativa according to the breeder who wrote the description, which occasionally signals no more than that the flowers are airier or the aroma sharper than the that breeder’s other lines.
The experience people connect with a word, clear-headed rather than sedating, is governed far more by terpene profile and the cannabinoid balance than by the sativa fraction, and a good number of « sativa-dominant » hybrids produce a heavy couch result while plenty of indica-labelled stock do exactly the reverse. 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 worthless unless accompanied by the terpene notes.
Intersex tendency
The production of male flowers on a female plant, typically towards the end in flower and often in response to stress. Almost every cannabis line has a degree of tendency to it; long-flowering plants express it more, for one plain one: sixteen weeks of flower is fourteen weeks of exposure for a timer leak, a heat spike or a late watering that can set it off, and an plant that has already waited past its intended end often throws a few desperate male sacs on its own in a last attempt to set seed.
None of this makes a sativa line unstable by nature; it makes the grower’s consistency matter over a longer stretch. Light-tight tents, steady conditions and harvesting the moment the plant is ready and not a weeks later take away most of the problem. A listing that states a breeder screens parents for intersex tendency is saying something more for a sativa than for any else.