Sativa seeds come with more jargon attached than any other category of cannabis seed, and most of it says one thing to a botanist, something else to a breeder and something different again to the person standing in front of the pack. A failed sativa grow nearly always traces back to a word that was understood in the wrong sense: a flowering time read as a promise, a “sativa-dominant” tag read as a description of effect, a landrace chosen as if it were a tent-bred hybrid. The entries below are put together with the range at https://hazesativaseeds.com open for reference, because it leans heavily to the classic end of the spectrum where the vocabulary matter most; the meanings themselves apply to any sativa seed from any shop. They are in no special order, since not one of them is sense on its own without the others.
Stretch
The surge of upward growth that follows the change to flowering. Most tent-bred plants gain around half again; sativas routinely double, and a few landrace types triple. The stretch lasts two to five weeks and cannot be halted once it begins, merely bent sideways by training.
In practical terms, a stretch multiplier is a number worth reading ahead of deciding when to switch. A sativa switched at sixty centimetres centimetres inside a standard tent is at the lamp by week four of flower; one switched at thirty centimetres centimetres has room. People coming from indica strains nearly always switch too late the first time, and the lesson is written on the ceiling of the tent.
Landrace
A population of plants shaped through generations to one place by local climate and growers together, rather than by modern selection. Thai, Colombian, Congolese and Mexican lines are the classic sativa examples. A landrace is variable, rather than a single plant: within a pack the heights, finishing times and smells range widely than in a tent-bred line, and this spread is the whole value of keeping one.
The trap is treating a landrace as a finished product. It brings habits that made sense in an open field, including height that no tent can hold and a flowering rhythm tuned to an equatorial daylength the majority of growers cannot offer. “Heirloom” on a listing usually refers to a landrace that has been grown out somewhere for some generations, typically with light selection towards tent conditions; it is closer to manageable but nonetheless not uniform. A shop listing “landrace” that does not give a origin point and a generation history is using the word as a flavour, and the pack should be judged accordingly.
Sativa-dominant
The marketing category and not a measurable one. It generally means that more of a hybrid’s lineage are classed as sativa by whoever wrote the listing, which occasionally signals nothing more than a certain the buds are airier or the aroma brighter than the that breeder’s indica-labelled lines.
The effect people connect with the word, lively instead of sedating, is driven far more by terpene profile and the cannabinoid content than it is by ancestry, and plenty of “sativa-dominant” hybrids produce a heavy sleepy result and a good number of indica-labelled lines do the reverse. For a grower the label is useful for a rough guide to growth habit, flowering time and stretch; for a predictor to how it feels it is next to useless unless accompanied by the terpene description.
Flowering time
The number of weeks from the onset of flowering and maturity, and the single most misread figure on a sativa pack. With photoperiod seed it is measured from the day the light drops to twelve hours, rather than from sowing, so a “fourteen-week” sativa grown with an eight-week vegetative period is a twenty-two-week plant. Seed companies also give the optimistic end of a range, because the longer end moves fewer seed.
Sativa plants take anywhere from ten weeks to well over twenty, and the longest line in the Haze Sativa Seeds range comes in at about 16 weeks after the switch. The catalogue can be filtered by that figure, which is the reasonable first step if you have a room on a tight timetable. A grower who adds four weeks on top of the figure the pack says is seldom disappointed.
Haze (the family, not the smell)
In its first sense a specific line of plants bred in coastal California from Colombian, Colombian and South Indian landraces, and later preserved and worked in the Netherlands. The Haze grows tall, branches openly, takes for twelve to to sixteen weeks and carries a scent of incense, pine and something sharp that no other other line quite has.
In its looser sense “Haze” is any hybrid that carries a share of that family, which by now is a great many of the sativa-leaning catalogue. A listing that reads “Haze” and gives no lineage could be eighty percent original old family or a small fraction of it, and the flowering time tracks the share, not the name. The useful question is never “is it a Haze” but “how much, and via which parent”.
Foxtailing
The tendency of certain flowers to grow new bud growth on top of existing ones, giving spired, open buds rather than round ones. In most tent-bred lines it is a stress response, typically caused by light that is too close or temperatures too high, and the advice is to fix the cause.
In a good number of sativas, especially Southeast Asian and certain Haze lines, it is built in and will occur under a perfect room. A first-time sativa grower frequently wastes a month hunting a fault that is not there, dropping lights and temperatures and slowing an already slow plant further. The listing rarely says which type you should expect; the lineage generally tells you.
Latitude
The single number that determines if a sativa will finish outdoors, and a number no pack prints. Equatorial plants need a run of shortening days to continue long enough to let the plant to finish; at northern latitudes the frost arrives first, and the grower harvests a unripe plant in the end of October or watches it rot in November. A further south, in the northern hemisphere, the longer the season runs, and coastal and subtropical growers can finish lines that northern growers cannot.
The practical reading of a seed pack: an “outdoor” line finishing month is given for the breeder’s own latitude, usually a point in temperate Europe or the west coast of the United States, and every degree north of it moves the date later towards the frost. A grower above roughly the fiftieth parallel who wants a long-flowering sativa outdoors needs to be shopping for an autoflower or else a greenhouse, and not a better summer.
Equatorial (the twelve-hour problem)
Refers to plants out of regions in which daylength barely changes through the year, and that the plant does not evolved a sharp reaction to shortening days. Such lines frequently flower slowly under a conventional twelve-hour schedule, because twelve hours is, to them, a mild unremarkable day rather than a signal.
The working response, passed down among sativa growers for decades, is to cut the light further: eleven hours, occasionally ten, especially in the last weeks. It loses a yield yield and gains an more clearer end. 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.
Hermaphroditism in long-flowering lines
The production of male flowers on a female plant, typically towards the end in flower and frequently in response to stress. Almost every cannabis population has some tendency for do; sativa plants express it more often, for a plain reason: sixteen weeks of flower is fourteen weeks of opportunity for a light leak, a heat spike or a missed watering that can trigger it going, and a old that has gone beyond its intended finish often produces a few desperate pollen flowers on its own as a last effort to make seed.
None of this makes a sativa strain unstable by nature; it makes the room’s discipline matter for a longer stretch. Light-tight room, stable conditions and harvesting the moment the plant is done rather than a weeks after remove most of the risk. A listing that states a breeder screens parents for intersex traits is worth worth hearing on a long-flowering line than for any other category.
Terpinolene (the “sativa smell”)
A aromatic compound found in large proportion in a lot of classic sativa strains and accounting for most of the thing growers mean as the “sativa” smell: fresh, woody, citrus and faintly sweet at once. It is volatile, driven off easily by hot drying, and it degrades more quickly in storage than the heavier terpenes that lead indica-leaning lines.
For a seed buyer the name earns two jobs. Where a listing names terpinolene as the leading aromas, the strain probably carries real Haze-era genetics whatever the percentage claims. And where the grower wants that profile to survive by the jar, the cure has to be slow and slow; a fast dry flattens a terpinolene line into something that smells of very little and no trace of what the pack promised.