Sativa seeds come with more jargon attached than any other category of cannabis seed, and most of it means one thing to a botanist, another to a breeder and a third to the person trying to make a decision in front of the listing. A failed sativa grow usually goes back to a word that was understood in the wrong sense: a flowering time taken as a fixed number, a “sativa-dominant” label taken as a description 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 as the concrete examples, because it runs heavily towards the long-flowering end of the spectrum and that is where the vocabulary carry the most weight most; the meanings though apply to any sativa seed from any shop. They are in no particular order, because not one of them makes sense on its own without the rest.

Foxtailing

The tendency of some flowers to grow fresh calyx clusters on top of existing ones, giving spired, irregular buds instead of dense ones. In the majority of tent-bred lines it is a heat response, typically from light that is too close or a room that is too high, and the standard response is to correct the room.

In a good number of sativas, above all Thai and some Haze lines, it is genetic and is going to happen under a perfect room. A new sativa grower frequently spends weeks hunting a fault that was never a problem, lowering lights and temperatures and delaying an already slow flower further. The breeder seldom says which type to expect; the parentage generally tells you.

Sativa-dominant (the label)

A marketing category and not a measurable one. It generally means that more of a hybrid’s parents are classed as sativa by the breeder who wrote the description, which occasionally means nothing more than that the buds are airier or the aroma brighter than the same breeder’s other releases.

The experience people connect with a word, clear-headed rather than sedating, is governed far more by terpene profile and the cannabinoid content than it is by the sativa fraction, and plenty of “sativa-dominant” hybrids deliver a heavy couch effect and plenty of the opposite stock do exactly 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 useless without the aroma description.

Landrace versus heirloom

A population of plants shaped through generations to a particular place by local climate and climate alike, rather than by modern selection. Thai, Thai, Congolese and Mexican lines are the classic sativa cases. A landrace is a spread, not a single plant: inside a pack the flowering times, finishing times and smells spread far more than any tent-bred hybrid, and that spread is the point of keeping one.

The trap is treating a landrace like a finished hybrid. It brings traits that made sense in an open field, such as a frame no tent can contain and a flowering rhythm set to a equatorial daylength most growers never offer. “Heirloom” on a listing generally refers to a landrace that has been grown out somewhere over a number of generations, often with a degree of selection for indoor conditions; it is nearer to usable but still far from a hybrid. A shop listing “landrace” without an origin region and a generation history is applying the word as a flavour, and the pack should be judged with that in mind.

Equatorial (the twelve-hour problem)

Describes plants from regions where daylength barely varies across the year, which means that the plant does not develop a strong reaction to shortening days. Such plants frequently flower reluctantly at a conventional twelve-hour schedule, since twelve hours is, to them, an ordinary day rather than a signal.

The practical response, passed down between sativa growers for decades, is to cut the light further: eleven hours, sometimes ten, particularly during the final weeks. It loses a little yield and gains a more clearer end. A listing that says “equatorial” is telling you this in one word, and a grower who takes it as a note on geography misses the instruction inside it.

Flowering time

The figure of weeks from the onset of flowering and maturity, and the single most frequently misunderstood number on a sativa pack. For photoperiod seed it is measured from the day the light is cut to twelve hours, rather than from sowing, so a “fourteen-week” sativa grown after a eight-week vegetative stage is a twenty-two-week plant. Breeders also quote the shorter end of the range, since the longer end moves less seed.

Long-flowering plants take anywhere from ten weeks to well over twenty, and the longest line in the Haze Sativa Seeds range is at around 16 weeks after the switch. The catalogue can be sorted by that number, which is a reasonable first pass for a room with a fixed timetable. A grower who adds four weeks to the figure the pack states is seldom disappointed.

Stretch (the doubling)

The surge of upward growth that follows the change to flowering. Indica-leaning plants add around half their height again; sativas routinely double, and some equatorial types triple. The stretch continues two to five weeks and will not be halted once it has started, only bent sideways by training.

In tent terms, a stretch figure is the fact to read before choosing when to flip. A sativa flipped at sixty centimetres centimetres in a two-metre tent is touching the lamp by week four of flower; one flipped at thirty centimetres has room. People coming over from indica strains almost always switch too late the first time, and the consequence is visible on the ceiling of the tent.

Intersex tendency

The appearance of male flowers on a female plant, typically late in flower and often under stress. Every cannabis line has some tendency for do; sativa lines show it more, and the reason is one simple one: sixteen weeks of flower is fourteen weeks of opportunity for a timer leak, a heat spike or a late watering that can set it off, and a plant plant has waited past its natural finish frequently produces a few desperate male flowers on its own in a final attempt to set seed.

Not one of this makes a sativa strain weak as a matter of nature; it means the room’s consistency matter for a longer stretch. Light-tight room, steady temperatures and cutting the moment the plant is done rather than two weeks after remove most of the risk. A listing which mentions the breeder tests parents for intersex traits is saying something worth hearing on a long-flowering line than on any else.

Latitude

The single number that decides if a sativa can finish outdoors, and a number no pack states. Long-flowering lines need a run of shortening days to go on late enough for the plant to ripen; in northern latitudes the frost arrives before that, and the grower cuts a half-finished plant in late October or else watches it to mould in November. A further to the equator, within the northern hemisphere, the longer the season runs, and Mediterranean and low-latitude growers can ripen plants that temperate growers never will.

The practical reading for a seed pack: an “outdoor” sativa finishing date is given for the breeder’s home latitude, usually somewhere within southern Europe or the western United States, and every step north of it pushes the finish later into the weather. A grower north of roughly the fiftieth parallel that wants a long-flowering sativa outdoors needs to be looking for a sativa autoflower or else a greenhouse, and not a longer summer.

Terpinolene (the “sativa smell”)

A aromatic compound present in large amounts in a lot of classic sativa lines and responsible for much of what growers describe as a “sativa” aroma: fresh, piney, citrus and faintly sweet at once. It is volatile, lost easily through fast drying, and it degrades faster in the cure than the earthier terpenes that lead indica-leaning stock.

For a seed buyer the name earns two things. Where a listing names terpinolene among the lead terpene, the strain most likely has substantial Haze-era ancestry regardless of what the percentage says. And where the grower are after that smell to survive to the jar, the cure is going to be cool and slow; a fast dry flattens a terpinolene line to something that tastes of hay and leaves nothing of what the pack described.