Sativa seeds come with more jargon attached than any other kind of cannabis seed, and a good deal of it says one 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. The disappointing sativa grow nearly always goes 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 statement of effect, a landrace bought like it were a tent-bred hybrid. The entries below were written with the range at https://hazesativaseeds.com open for the concrete examples, since it runs heavily towards the long-flowering end of the category where the words matter most; the definitions themselves apply to any sativa seed from any seller. They are given in no particular order, since none of them makes sense without the others.
Intersex tendency
The production of pollen-bearing flowers on a female plant, usually late in flower and frequently in response to stress. Almost every cannabis population carries a degree of capacity to do; long-flowering plants express it more, and the reason is one simple reason: fourteen weeks of flower is fourteen weeks of exposure for a light leak, a heat spike or a missed watering to set it off, and a plant that has already waited beyond its intended end frequently throws a few desperate male sacs on its own in a last attempt to set seed.
None of these makes a sativa line unstable as a matter of course; it makes the room’s consistency matter for a longer stretch. Light-tight tents, steady conditions and harvesting when the plant is done rather than a weeks later remove most of the problem. A listing which states a breeder screens parents for intersex traits is saying something more for a long-flowering line than for anything else.
Sativa-dominant
A catalogue term rather than a botanical one. It generally means that more of a hybrid’s parents were described as sativa by whoever wrote the listing, which sometimes means nothing more than that the buds are longer or the aroma brighter than the same breeder’s other lines.
The effect people associate with the word, lively instead of heavy, is governed more by terpene profile and by THC balance than it is by the sativa fraction, and plenty of “sativa-dominant” hybrids deliver a flat couch result and plenty of the opposite lines do the opposite. To a buyer the percentage is useful for a rough hint to growth habit, flowering time and stretch; for a predictor to how it feels it is next to worthless without the aroma notes.
Stretch (the doubling)
The surge of upward growth that follows the change to flowering. Indica-leaning plants add half again; sativas commonly double, and some equatorial types triple. The stretch lasts two to five weeks and cannot be stopped once it has started, only redirected by training.
In tent terms, a stretch figure is a number to reading ahead of deciding when to flip. A sativa switched at sixty centimetres in a standard tent is at the lamp by week four of flower; one flipped at thirty centimetres centimetres has room. Growers moving from indica strains nearly always flip too late the first time, and the lesson is visible on the ceiling of the tent.
Terpinolene (the “sativa smell”)
A terpene present in large amounts in a lot of classic sativa lines and accounting for much of what people describe as the “sativa” smell: green, piney, citrus and slightly floral all at once. It is fragile, driven off quickly by hot drying, and terpinolene degrades more quickly in storage than the heavier terpenes that lead most tent lines.
To a seed buyer the word earns two jobs. When a listing lists terpinolene among the leading terpene, the strain most likely carries real old-sativa genetics whatever the percentage says. And when the grower are after that smell to survive by the jar, the drying has to be cool and cool; a warm drying room turns a terpinolene sativa to something that smells of hay and leaves nothing of what the pack described.
Flowering time (and what it is counted from)
The number of weeks from the onset of flowering and harvest, and the one most misread number on a sativa pack. With photoperiod seed it is measured from the day the light drops to twelve hours, not from germination, so a “fourteen-week” sativa grown with a ordinary vegetative period is a five-month plant. Breeders also quote the optimistic end of a spread, since the other end sells less seed.
Sativa lines take everywhere from ten weeks to well over twenty, and the longest line in the Haze Sativa Seeds range comes in at about 16 weeks from the switch. The catalogue can be sorted by this number, which is the sensible first pass for a grower on a tight schedule. A grower who adds four weeks to whatever the pack says is seldom disappointed.
Foxtailing
The habit of certain flowers to push out fresh bud clusters on top of existing ones, producing towered, irregular buds rather than dense ones. In the majority of tent-bred lines it is a heat response, typically caused by light that is too close or temperatures that is too high, and the standard response is to fix the cause.
In many sativas, above all Southeast Asian and some Haze lines, it is genetic and is going to occur under a perfect room. A new sativa grower frequently wastes weeks hunting a fault that was never not a problem, lowering lights and heat and delaying a long flower even more. The listing rarely says which kind to expect; the parentage generally tells you.
Haze (the family, not the smell)
Originally a specific family of plants put together in coastal California from Colombian, Colombian and Thai landraces, and then preserved and refined in the Netherlands. A true Haze runs tall, branches openly, takes for twelve to sixteen weeks and carries a scent of incense, citrus and something metallic that no other line exactly has.
In its looser sense “Haze” is any hybrid that carries some of that family, which today is a great many of the sativa-leaning market. A listing which reads “Haze” and gives no parents may be eighty percent the classic family or a sixteenth of it, and the grow character tracks the fraction, not the name. The working question is not “is it a Haze” but “how much, and via which parent”.
Latitude
The one figure that decides if a sativa will ripen outdoors, and one that no pack states. Long-flowering plants require the autumn days to continue late enough to let the plant to finish; in northern latitudes the frost comes before that, and the grower harvests a half-finished plant in late October or else loses it rot in November. The further south, in a northern hemisphere, the later the season runs, and Mediterranean and subtropical gardens can ripen lines that northern growers never will.
The practical reading for a seed listing: an “outdoor” sativa finishing month is stated for the breeder’s own latitude, normally a point in southern Europe or the west coast of the United States, and each degree north of it moves the date back towards the frost. A grower north of roughly the fiftieth parallel that wants a long-flowering sativa in the garden is shopping for an autoflower or a greenhouse, not a longer summer.
Equatorial
Describes plants out of latitudes where daylength barely varies through the year, which means that the plant does not develop a sharp reaction to shortening days. Such lines frequently flower slowly at a standard twelve-hour light cycle, since twelve hours is, for them, an ordinary day rather than a signal.
The working fix, passed down between sativa growers over decades, is to shorten the light more: eleven hours, occasionally ten, especially during the last weeks. It loses some yield yield and buys an earlier clearer finish. A listing which uses “equatorial” is telling you this with one word, and a grower who takes it as mere origin misses the instruction inside it.
