Sativa seeds come with more jargon attached than any other kind of cannabis seed, and most of it says one thing to a botanist, another to a breeder and a third to the person standing in front of the listing. The disappointing sativa grow nearly always goes back to a word that was understood in the wrong sense: a flowering time read as a fixed number, a “sativa-dominant” tag read as a statement of effect, a landrace chosen like it were a modern hybrid. The entries below are put together with the range at https://hazesativaseeds.com to hand for the concrete examples, because it leans strongly towards the long-flowering end of the spectrum and that is where the vocabulary matter most; the definitions themselves hold to any sativa seed from any shop. They are given in no special order, because none of them is sense without the others.
Terpinolene
A aromatic compound found in high proportion in a lot of classic sativa strains and responsible for most of what people describe as a “sativa” smell: green, woody, lemon and faintly floral all at once. It is volatile, driven off quickly through fast drying, and terpinolene degrades more quickly in storage than the earthier terpenes that lead most tent lines.
To a seed buyer the word earns two things. When a listing names terpinolene as the leading aromas, the strain probably has real Haze-era genetics regardless of what the percentage claims. And when the grower wants that profile to still be there by the jar, the drying has to be slow and cool; a fast dry flattens a terpinolene sativa to a flower that smells of very little and leaves nothing of what the pack promised.
Equatorial (the twelve-hour problem)
Describes plants from regions where daylength hardly varies through the year, and where the plant never develop a sharp response to changing days. These lines often flower reluctantly at a conventional twelve-hour light cycle, since twelve hours is, to them, a mild unremarkable day and not a signal.
The practical response, handed down between sativa growers over decades, is to shorten the light further: eleven hours, occasionally ten, especially during the final weeks. It loses some little yield and buys an earlier decisive end. A listing that says “equatorial” is telling you about this in one word, and a grower who reads it as a note on geography has missed the instruction inside it.
Foxtailing (and when it is not a fault)
The tendency of some flowers to push out new bud clusters on top of old ones, producing spired, open buds instead of round ones. In the majority of tent-bred strains it is a heat response, usually from light too close or temperatures that is too high, and the advice is to correct the cause.
In a good number of sativas, above all Southeast Asian and some Haze lines, it is built in and is going to occur under a perfect room. A new sativa grower often spends weeks chasing a fault that was never a problem, dropping lights and temperatures only delaying a slow plant further. The listing seldom warns which kind you should expect; the lineage generally tells you.
Landrace versus heirloom
A population of plants shaped through centuries to one place by local growers and growers alike, and not by modern breeding. Thai, Colombian, Malawian and Mexican lines are the classic sativa examples. A landrace is variable, rather than a one plant: inside a pack the flowering times, flowering times and aromas spread widely than a tent-bred hybrid, and that spread is the point of growing one.
The mistake is treating a landrace like a modern product. It brings habits that made sense in an open field, such as height no tent can contain and a flowering clock tuned to an daylength the majority of growers never provide. “Heirloom” on a listing usually means a landrace that has been reproduced away from its origin over a number of generations, often with light selection for tent conditions; it is nearer to manageable but nonetheless not a hybrid. A seller listing “landrace” that does not give an origin region and a reproduction count is using the word loosely, and the seeds should be priced with that in mind.
Latitude
The single number that determines whether a sativa will finish outdoors, and one no pack prints. Equatorial lines need the autumn days to continue long enough for the plant ripen; in northern latitudes the frost comes before that, and the grower cuts a unripe plant in late October or else watches it rot in November. A further south, in the northern hemisphere, the longer the season runs, and coastal and low-latitude gardens are able to ripen lines that temperate growers never will.
The usable rule of a seed listing: an “outdoor” sativa finishing month is stated for the breeder’s home latitude, normally a point in southern Europe or the west coast of the United States, and every degree north of it pushes the finish back towards the frost. A grower north of roughly the fiftieth parallel that is after a long-flowering sativa in the garden is looking for a sativa autoflower or else a covered space, and not a longer summer.
Hermaphroditism in long-flowering lines
The production of male flowers on a female plant, usually towards the end in flower and frequently under stress. Every cannabis population has some capacity for do; sativa lines express it more often, and the reason is a simple one: sixteen weeks of flower is fourteen weeks of exposure for a timer leak, a heat spike or a missed watering that can set it off, and an old plant has already gone beyond its intended end frequently throws a few late pollen flowers on its own in a final effort to set seed.
None of this makes a sativa strain unstable by course; it means the grower’s consistency matter over longer. A sealed tents, stable conditions and cutting the moment the plant is ready and not a weeks later take away the greater part of the problem. A listing which states the breeder screens parents for hermaphrodite traits is saying something worth hearing for a long-flowering line than on anything other category.
Flowering time (and what it is counted from)
The figure of weeks between the start of flowering and harvest, and the single 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 sowing, so a “fourteen-week” sativa started with an ordinary vegetative period is a twenty-two-week plant. Breeders also give the shorter end of the range, because the longer end sells fewer seed.
Sativa lines run anywhere from ten weeks to more than twenty, and the slowest strain in the Haze Sativa Seeds range is at about 16 weeks from the switch. The catalogue can be filtered by this number, which is the sensible first step if you have a room with a fixed timetable. A grower who allows four weeks to the figure the pack says is rarely disappointed.
Stretch (the doubling)
The surge of upward growth that comes after the change to flowering. Most tent-bred plants add half their height again; sativas routinely double, and a few equatorial types go further. The stretch continues three to four weeks and cannot be stopped after it has started, only redirected by training.
In practical terms, a stretch figure is the number to reading ahead of deciding when to switch. A sativa flipped at sixty centimetres in a two-metre tent is touching the lamp by week four of flower; one switched at thirty centimetres centimetres has room. People coming from indica stock almost always switch far too late the first time, and the consequence is written on the ceiling of the tent.
Haze
Originally a particular family of plants bred in coastal California from Mexican, Thai and South Indian landraces, and later kept and worked in the Netherlands. The Haze runs tall, branches openly, takes for twelve sixteen weeks and smells of incense, citrus and something sharp that no other line quite has.
In its looser sense “Haze” is any hybrid that contains a share of that family, and by now is a great many of the sativa-leaning market. A listing which says “Haze” without lineage could be eighty percent original classic family or one small fraction of it, and the flowering time tracks the fraction, not the name. The useful question is not “is it a Haze” but “how much, and via which parent”.