Sativa seeds arrive with more jargon attached than any other kind of cannabis seed, and a good deal of it says a certain thing to a botanist, another to a seed company and something different again to the person trying to make a decision in front of the listing. A failed sativa grow usually traces back to a word that was understood in the wrong one of those senses: a flowering time read as a promise, a “sativa-dominant” label taken as a statement of effect, a landrace bought like it were a modern hybrid. The entries below are put together with the range at https://hazesativaseeds.com open for the concrete examples, since it leans heavily towards the long-flowering end of the spectrum and that is where the vocabulary matter most; the definitions themselves apply to any sativa seed from any seller. They are in no particular order, since not one of them is sense on its own without the rest.
Equatorial
Describes plants out of latitudes where daylength barely varies through the year, and where the plant never evolved a strong response to changing days. These plants frequently flower slowly under a standard twelve-hour light cycle, since twelve hours is, for them, a mild ordinary day rather than a signal.
The practical response, passed down between sativa growers over decades, is to cut the light further: eleven hours, sometimes ten, especially in the last weeks. It loses a little yield and buys a earlier decisive finish. A listing which uses “equatorial” is telling you this in one word, and a grower who takes it as a note on origin misses the instruction hidden in it.
Foxtailing (and when it is not a fault)
The tendency of certain flowers to push out new calyx growth on top of old ones, producing towered, irregular buds rather than dense ones. In the majority of indica-leaning lines it is a stress response, typically from light too close or temperatures that is too high, and the standard response is to correct the cause.
In many sativas, above all Southeast Asian and some Haze lines, it is genetic and will occur under a flawless room. A new sativa grower often spends weeks hunting a problem that was never there, dropping lights and temperatures and delaying an already long flower even more. The listing rarely says which kind to expect; the parentage usually tells you.
Latitude (outdoor sativas)
The single number that decides if a sativa can finish outdoors, and a number that no pack prints. Long-flowering lines require a autumn days to continue long enough to let the plant to finish; at high latitudes the frost comes before that, and the grower cuts a half-finished plant in the end of October or watches it rot in November. The further south, in the northern hemisphere, the longer the window stretches, and Mediterranean or low-latitude gardens can ripen plants that northern growers cannot.
The usable reading for a seed pack: an “outdoor” sativa harvest date is given for the breeder’s home latitude, usually somewhere within temperate Europe or the western United States, and every step further north of that pushes the finish later towards the weather. A grower north of roughly the fiftieth parallel who is after a true sativa outdoors needs to be shopping for an autoflower or else a greenhouse, not a longer summer.
Haze
In its first sense a particular family of plants put together in 1970s California from Mexican, Colombian and Thai landraces, and then preserved and refined in the Netherlands. The Haze runs tall, fills out openly, takes for twelve to sixteen weeks and smells of spice, pine and something sharp that no other other line exactly has.
In its looser sense “Haze” is any hybrid which carries some of that family, which by now is most of the sativa-leaning market. A listing which reads “Haze” without parents may be eighty percent the classic family or a small fraction 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 via which parent”.
Terpinolene (the “sativa smell”)
A aromatic compound found in high proportion in many classic sativa strains and accounting for much of what people mean as the “sativa” aroma: green, piney, lemon and faintly floral at once. It is fragile, driven off quickly through fast drying, and it fades more quickly during storage than the earthier terpenes that lead most tent lines.
For a seed buyer the name does two jobs. When a listing lists terpinolene as the leading terpene, the line most likely carries substantial Haze-era ancestry whatever the label claims. And where the grower wants that profile to still be there to the jar, the drying has to be cool and slow; a fast dry turns a terpinolene line into a flower that tastes of hay and nothing of what the pack described.
Flowering time
The number of weeks between the start of flowering and maturity, which is the single most frequently misunderstood figure on a sativa pack. With photoperiod seed it is counted from the day the light drops to twelve hours, not from germination, so a “fourteen-week” sativa started after a eight-week vegetative period is a five-month plant. Breeders additionally quote the shorter end of the range, because the other end sells fewer seed.
Sativa plants run everywhere from ten weeks to more than twenty, and the longest strain in the Haze Sativa Seeds range comes in at about 16 weeks after the flip. The catalogue can be sorted by this figure, which is the sensible first pass for a room with a fixed schedule. A grower who allows four weeks to the figure the pack states is rarely caught out.
Landrace
A population of plants adapted over centuries to one place by local growers and climate alike, rather than by modern breeding. Colombian, Thai, Malawian and Mexican stock are the sativa cases. A landrace is variable, not a one plant: within a pack the heights, finishing times and aromas spread widely than a tent-bred hybrid, and this spread is the whole value of growing one.
The trap is buying a landrace as a finished hybrid. It brings traits that make sense in an equatorial field, such as a frame no tent can contain and a flowering rhythm tuned to an daylength most growers cannot provide. “Heirloom” on a listing generally refers to a landrace that has been reproduced somewhere over a number of generations, typically with a degree of selection for tent life; it is nearer to usable but nonetheless not a hybrid. A seller offering “landrace” that does not give an collection region and a reproduction count is applying the word as a flavour, and the pack should be judged with that in mind.
Stretch (the doubling)
The surge of vertical growth that comes after the switch to flowering. Most tent-bred plants gain half again; sativas routinely double, and some equatorial types triple. The stretch continues three to five weeks and cannot be halted after it begins, merely bent sideways by training.
In practical terms, the stretch figure is a fact worth reading before deciding when to flip. A sativa switched at sixty centimetres in a two-metre tent is touching the lamp by week four of flower; one flipped at thirty centimetres centimetres has room. People coming from indica strains 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 catalogue term and not a botanical one. The phrase usually indicates that the larger share of a hybrid’s lineage were described as sativa according to the breeder who drafted the listing, and occasionally signals no more than a certain the flowers are airier or the aroma brighter than the same breeder’s other releases.
The experience people associate with a word, clear-headed rather than heavy, is governed more by terpene chemistry and by THC content than by the sativa fraction, and a good number of “sativa-dominant” releases produce a heavy couch effect while a good number of indica-labelled stock deliver the reverse. For a buyer the percentage is worth something for a rough guide to growth habit, flowering time and stretch; as a predictor to how it feels it is close to worthless without the aroma notes.
Intersex tendency
The appearance of pollen-bearing flowers on a female plant, usually towards the end in flower and frequently in response to stress. Every cannabis population has a degree of tendency for do; long-flowering plants express it more often, for one plain one: fourteen weeks of flower is sixteen weeks of opportunity for a timer leak, a heat spike or a missed watering that can trigger it off, and a old that has waited past its intended finish often produces a few late male sacs on its own in a last attempt to make seed.
Not one of these makes a sativa strain weak as a matter of nature; it makes the grower’s discipline matter for longer. Light-tight tents, steady temperatures and cutting the moment the plant is done and not a weeks after remove most of the risk. A listing which states the breeder screens parents for intersex traits is worth more on a sativa than for anything else.