Sativa seeds come with more jargon around them than any other category of cannabis seed, and most of it says a certain thing to a botanist, another to a breeder and something different again to the grower standing in front of the listing. A disappointing sativa grow nearly always traces back to a word that was read in the wrong one of those senses: a flowering time read as a promise, a “sativa-dominant” tag taken as a statement of character, a landrace chosen as if it were a tent-bred hybrid. The entries below were put together with the range at https://hazesativaseeds.com to hand for the concrete examples, because it runs strongly to the long-flowering end of the spectrum and that is where the vocabulary matter most; the meanings themselves apply to any sativa seed from any shop. They are given in no special order, since none of them is usable without the rest.
Stretch (the doubling)
The surge of vertical growth which comes after the change to flowering. Most tent-bred plants add around half again; sativas commonly double, and some equatorial lines triple. The stretch lasts three to five weeks and will not be halted once it has started, only bent sideways by training.
In tent terms, the stretch figure is a fact worth read ahead of deciding when to flip. A sativa flipped at sixty centimetres centimetres in a standard tent is at the lamp before week four of flower; one switched at thirty centimetres has room. Growers coming from indica stock almost always switch far too late the first time, and the consequence is visible on the ceiling of the tent.
Flowering time (and what it is counted from)
The number of weeks between the start of flowering and maturity, 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 sowing, so a “fourteen-week” sativa started with a eight-week vegetative stage is a twenty-two-week plant. Seed companies also quote the shorter end of a range, since the longer end sells fewer seed.
Sativa lines run anywhere from ten weeks to well over twenty, and the slowest line in the Haze Sativa Seeds range is at about 16 weeks from the switch. The catalogue can be sorted by that number, which is a reasonable first step for a grower with a tight timetable. A grower who allows four weeks to the figure the pack states is seldom caught out.
Latitude (outdoor sativas)
The one figure that determines if a sativa can ripen outdoors, and one that no pack states. Equatorial lines need the run of shortening days to continue late enough for the plant finish; at northern latitudes the frost comes before that, and the grower cuts a half-finished plant in late October or watches it rot in November. The closer to the equator, within the northern hemisphere, the longer the window runs, and Mediterranean or subtropical gardens are able to finish lines that temperate gardens never will.
The usable rule for a seed listing: an “outdoor” line harvest date is stated for the breeder’s home latitude, normally a point within temperate Europe or the west coast of the United States, and each step further north of that moves the finish back into the frost. A grower north of about the fiftieth parallel who wants a long-flowering sativa outdoors is looking for a sativa autoflower or else a greenhouse, and not a longer summer.
Foxtailing
The tendency of some flowers to push out new bud growth on top of existing ones, giving spired, open buds instead of dense ones. In the majority of tent-bred strains it is a stress response, usually caused by light too close or a room that is too high, and the advice is to fix the cause.
In a good number of sativas, especially Southeast Asian and some Haze hybrids, it is built in and is going to occur under a flawless room. A new sativa grower frequently spends weeks chasing a fault that was never not a problem, lowering lights and temperatures and delaying an already slow flower even more. The breeder seldom warns which kind to expect; the parentage usually does.
Terpinolene
A terpene found in high proportion in a lot of classic sativa strains and responsible for most of what growers describe as the “sativa” aroma: fresh, piney, lemon and slightly floral at once. It is volatile, driven off quickly through hot drying, and terpinolene degrades more quickly in the cure than the earthier terpenes which lead indica-leaning stock.
To a seed buyer the name does two jobs. When a listing names terpinolene as the leading aromas, the strain most likely has real Haze-era ancestry whatever the label says. And where the grower wants that profile to survive to the jar, the cure has to be cool and slow; a fast dry flattens a terpinolene line to a flower that smells of hay and leaves no trace of what the pack described.
Intersex tendency
The production of pollen-bearing flowers on a female plant, usually towards the end in flower and frequently under stress. Every cannabis line has some tendency for it; sativa plants show it more, for one simple reason: fourteen weeks of flower is sixteen weeks of exposure for a timer leak, a heat spike or a missed watering to set it going, and an old plant has gone beyond its natural end often produces a few late male flowers on its own in a final effort to set seed.
Not one of this means a sativa line unstable by nature; it makes the grower’s consistency count over longer. Light-tight room, steady conditions and harvesting when the plant is done rather than a weeks later take away the greater part of the problem. A listing that states a breeder screens parents for hermaphrodite traits is worth more for a sativa than on anything other category.
Haze
In its first sense a specific line of plants put together in 1970s California from Colombian, Thai and Thai landraces, and then kept and refined in the Netherlands. The Haze runs tall, branches sparsely, flowers for twelve to to sixteen weeks and carries a scent of spice, pine and something sharp that no other line exactly has.
In its looser sense “Haze” is any hybrid which contains some of that family, and today is a great many of the sativa-leaning catalogue. A listing which reads “Haze” without lineage could be mostly percent the classic family or a small fraction of it, and the grow time tracks the share, not the name. The working question is never “is it a Haze” but “how much, and via which parent”.
Landrace versus heirloom
A population of plants adapted over centuries to one region by local climate and climate alike, rather than by modern breeding. Colombian, Colombian, Malawian and Mexican lines are the classic sativa cases. A landrace is variable, not a one plant: within a pack the flowering times, flowering times and aromas range widely than in any tent-bred line, and this spread is the whole value of keeping one.
The mistake is buying a landrace as a finished product. It carries habits that make sense in an open field, including height that no tent can contain and a flowering rhythm tuned to an equatorial daylength the majority of growers cannot offer. “Heirloom” in a listing usually means a landrace that has been reproduced away from its origin over a number of generations, often with a degree of selection for indoor conditions; it is closer to manageable but still not uniform. A seller offering “landrace” without an collection region and a generation history is applying the word as a flavour, and the seeds should be priced with that in mind.
Sativa-dominant (the label)
A catalogue category rather than a botanical one. The phrase usually means that the larger share of a hybrid’s lineage were classed as sativa by whoever wrote the description, and occasionally signals no more than a certain the buds are airier or the smell sharper than the same breeder’s other releases.
The experience people connect with a word, clear-headed instead of heavy, is driven far more by terpene chemistry and the THC content than it is by the sativa fraction, and plenty of “sativa-dominant” hybrids produce a flat couch result while plenty of indica-labelled stock deliver the opposite. For a grower 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 useless without the terpene notes.
Equatorial (the twelve-hour problem)
Refers to lines from regions where daylength barely changes through the year, and where the plant never develop a sharp reaction to shortening days. Such plants frequently flower slowly under a standard twelve-hour schedule, since twelve hours is, for them, a mild ordinary day and not a signal.
The working fix, handed down between sativa growers over decades, is to cut the light more: eleven hours, sometimes ten, especially during the final weeks. It loses a little yield and buys a more decisive finish. A listing which says “equatorial” is warning you about this with one word, and a grower that takes it as mere geography has missed the instruction inside it.