Sativa seeds arrive with more vocabulary attached than any other category of cannabis seed, and a good deal of it means a certain thing to a botanist, something else to a seed company and something different again to the person standing in front of the listing. A disappointing sativa grow usually traces back to a word that was read in the wrong one of those senses: a flowering time read as a fixed number, a “sativa-dominant” label 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 as reference, because it runs strongly towards the long-flowering end of the category and that is where the vocabulary matter most; the meanings themselves apply to any sativa seed from any seller. They are in no particular order, since none of them makes usable on its own without the rest.
Landrace
A population of plants shaped over centuries to a particular region by the local growers and climate alike, rather than by modern breeding. Thai, Colombian, Malawian and Oaxacan lines are the classic sativa cases. A landrace is a spread, not a single plant: inside a pack the heights, flowering times and aromas range widely than in any tent-bred hybrid, and this variation is the whole value of keeping one.
The trap is buying a landrace like a modern product. It brings habits that made sense in an equatorial field, such as height that no tent can hold and a flowering clock tuned to a daylength the majority of growers cannot offer. “Heirloom” in a listing usually refers to a landrace that has been grown out away from its origin for some generations, typically with light selection towards tent life; it is closer to manageable but still far from uniform. A shop offering “landrace” that does not give an origin point and a reproduction count is applying the word as a flavour, and the seeds should be judged with that in mind.
Stretch
The surge of upward growth that follows the change to flowering. Indica-leaning plants add around half their height again; sativas routinely double, and a few equatorial types triple. The stretch lasts two to four weeks and will not be stopped after it has started, merely bent sideways by training.
In practical terms, a stretch multiplier is a fact to reading ahead of choosing when to switch. A sativa switched at sixty centimetres centimetres in a standard tent is at the lamp before week four of flower; one switched at thirty centimetres centimetres has room. Growers moving over from indica stock almost always flip too late the first time, and the lesson is visible on the ceiling of the tent.
Sativa-dominant (the label)
The catalogue term and not a botanical one. It usually means that the larger share of a hybrid’s lineage were described as sativa by whoever drafted the listing, and occasionally means no more than that the flowers are longer or the aroma brighter than the that breeder’s other releases.
The effect people associate with a word, clear-headed rather than sedating, is governed more by terpene profile and by cannabinoid content than by ancestry, and a good number of “sativa-dominant” releases produce a flat couch effect and a good number of the opposite stock do the reverse. For a grower the label is worth something as a loose hint to growth habit, flowering time and stretch; for a predictor to effect it is close to worthless unless accompanied by the aroma notes.
Terpinolene (the “sativa smell”)
A aromatic compound found in large proportion in a lot of old sativa lines and accounting for much of what people describe as a “sativa” aroma: fresh, woody, lemon and faintly floral at once. It is fragile, driven off quickly by fast drying, and terpinolene degrades faster during storage than the heavier terpenes that lead indica-leaning stock.
For a seed buyer the name does two things. Where a listing lists terpinolene among the leading aromas, the line most likely has real Haze-era genetics whatever the label claims. And when the you are after that profile to survive to the jar, the drying has to be cool and slow; a fast dry turns a terpinolene line into a flower that tastes of very little and leaves no trace of what the pack described.
Foxtailing
The tendency of some flowers to push out fresh bud clusters on top of old ones, giving towered, irregular buds rather than dense ones. In the majority of indica-leaning strains it is a heat response, typically from light too close or temperatures that is too high, and the standard response is to correct the cause.
In a good number of sativas, especially Southeast Asian and some Haze lines, it is genetic and is going to happen under a perfect room. A first-time sativa grower often wastes weeks hunting a problem that is there, dropping lights and temperatures and delaying a slow flower even more. The listing rarely says which kind you should expect; the lineage generally does.
Haze (the family, not the smell)
Originally a particular family of plants bred in coastal California from Mexican, Thai and South Indian parents, and then kept and worked in the Netherlands. A true Haze runs tall, branches sparsely, takes for twelve sixteen weeks and carries a scent of spice, citrus and a note sharp that no line quite reproduces.
In its second sense “Haze” is any hybrid which carries a share of that family, and today is most of the sativa-leaning catalogue. A listing that says “Haze” and gives no lineage could be mostly percent the old family or one small fraction of it, and the flowering character tracks the fraction, not the name. The useful question is never “is it a Haze” but “how much, and through which parent”.
Hermaphroditism in long-flowering lines
The appearance of male flowers on a female plant, usually towards the end in flower and often under stress. Almost every cannabis line has some capacity to do; sativa lines express it more often, for a plain reason: sixteen weeks of flower is fourteen weeks of opportunity for a timer leak, a temperature spike or a late watering that can trigger it going, and a old plant has waited past its intended end often throws a few desperate male sacs on its own as a final attempt to set seed.
Not one of these makes a sativa strain unstable by nature; it means the room’s consistency matter over a longer stretch. Light-tight room, steady conditions and harvesting when the plant is ready and not two weeks after remove the greater part of the risk. A listing that states the breeder tests parents for intersex tendency is saying something more on a long-flowering line than for anything other category.
Equatorial
Refers to plants out of regions where daylength barely changes across the year, and where the plant never develop a strong response to changing days. Such plants frequently flower slowly under a conventional twelve-hour schedule, because twelve hours is, for them, an ordinary day rather than a signal.
The working fix, handed around among sativa growers over decades, is to cut the light more: eleven hours, sometimes ten, particularly during the final weeks. It costs some yield yield and buys an earlier clearer finish. A listing which uses “equatorial” is telling you about this with one word, and a grower who reads it as a note on origin misses the point hidden in it.
Flowering time (and what it is counted from)
The figure of weeks between the onset of flowering and harvest, and the one most misunderstood figure on a sativa pack. With photoperiod seed it is counted from the day the light drops to twelve hours, rather than from germination, so a “fourteen-week” sativa started with a ordinary vegetative period is a twenty-two-week plant. Breeders also quote the shorter end of the spread, since the other end moves fewer seed.
Long-flowering lines run everywhere from ten weeks to well over twenty, and the slowest line in the Haze Sativa Seeds range is at around 16 weeks after the flip. The catalogue can be filtered by that number, which is the reasonable first step if you have a grower on a fixed schedule. A grower who adds four weeks on top of the figure the pack says is seldom caught out.
Latitude
The one number that determines if a sativa can ripen outdoors, and a number that no pack states. Equatorial lines require a autumn days to go on long enough to let the plant finish; in northern latitudes the frost arrives first, and the grower cuts an half-finished plant in late October or loses it to mould in November. A further south, within a northern hemisphere, the longer the season runs, and coastal or low-latitude growers can ripen lines that northern gardens cannot.
The usable reading of a seed pack: an “outdoor” sativa finishing date is given for the breeder’s home latitude, normally a point within temperate Europe or the western United States, and each degree north of that pushes the finish later towards the weather. A grower north of about the fiftieth parallel who is after a long-flowering sativa outdoors needs to be looking for a sativa autoflower or else a covered space, not a longer summer.