Sativa seeds come with more vocabulary attached than any other category of cannabis seed, and most of it means a certain thing to a botanist, another to a breeder and a third to the grower trying to make a decision in front of the listing. The failed sativa grow usually goes back to a word that was read in the wrong sense: a flowering time taken as a fixed number, a “sativa-dominant” tag read as a description of character, a landrace bought as if it were a modern hybrid. The entries below are put together with the range at https://hazesativaseeds.com to hand as reference, because it runs heavily towards the classic end of the category and that is where the vocabulary matter most; the meanings though apply to any sativa seed from any shop. They are in no particular order, since none of them is sense on its own without the rest.
Sativa-dominant (the label)
A catalogue category rather than a botanical one. The phrase usually indicates that the larger share of a hybrid’s parents are described as sativa by the breeder who wrote the listing, which sometimes means no more than that the flowers are airier or the aroma sharper than the same breeder’s indica-labelled lines.
The effect people associate with the word, clear-headed instead of heavy, is driven more by terpene chemistry and the cannabinoid balance than by the sativa fraction, and a good number of “sativa-dominant” releases produce a heavy sleepy result and plenty of indica-labelled lines do the reverse. For a grower the label is worth something for a loose guide to growth habit, flowering time and stretch; for a guide to how it feels it is close to worthless without the aroma notes.
Equatorial
Refers to plants from latitudes where daylength barely changes across the year, and where the plant never evolved a strong response to changing days. Such plants frequently start flowering slowly at a standard twelve-hour light cycle, since twelve hours is, for them, an ordinary day rather than a signal.
The working fix, passed down between sativa growers over decades, is to shorten the light further: eleven hours, sometimes ten, especially during the last weeks. It costs a yield yield and gains an earlier clearer finish. A listing that uses “equatorial” is warning you this in one word, and a grower who takes it as a note on origin has missed the instruction hidden in it.
Stretch (the doubling)
The surge of upward growth which follows the change to flowering. Most tent-bred plants add half again; sativas commonly double, and a few equatorial lines go further. The stretch lasts two to five weeks and cannot be stopped once it begins, only bent sideways by training.
In practical terms, a stretch figure is a fact to read before choosing when to flip. A sativa flipped at sixty centimetres centimetres inside a two-metre tent is touching the lamp by week four of flower; one switched at thirty centimetres centimetres has room. Growers coming from indica stock almost always switch too late the first time, and the consequence is visible on the ceiling of the tent.
Haze
Originally a specific family of plants bred in 1970s California from Colombian, Colombian and Thai landraces, and then preserved and refined in the Netherlands. The Haze runs tall, branches openly, takes for twelve to to sixteen weeks and carries a scent of spice, pine and something metallic that no other other line quite reproduces.
In its looser sense “Haze” is whatever hybrid which contains some of that family, which today is most of the sativa-leaning market. A listing which says “Haze” without parents may be eighty percent original classic family or a small fraction of it, and the grow character tracks the fraction, not the name. The useful question is never “is it a Haze” but “how much, and through which parent”.
Latitude (outdoor sativas)
The single number that decides if a sativa can ripen outdoors, and a number that no pack prints. Long-flowering lines require a run of shortening days to go on long enough to let the plant to ripen; at high latitudes the frost comes before that, and the grower cuts an half-finished plant in late October or else watches it rot in November. A closer south, within the northern hemisphere, the later the window runs, and Mediterranean or low-latitude gardens are able to ripen plants that temperate growers cannot.
The usable reading for a seed listing: an “outdoor” sativa harvest month is given for the breeder’s own latitude, usually somewhere within temperate Europe or the west coast of the United States, and every degree north of that moves the date back into the frost. A grower above about the fiftieth parallel who wants a true sativa in the garden is shopping for an autoflower or else a covered space, and not a better summer.
Flowering time
The figure of weeks from the start of flowering and harvest, which is the one most misread figure on a sativa pack. With photoperiod seed it is counted from the day the light is cut to twelve hours, rather than from sowing, so a “fourteen-week” sativa started with a eight-week vegetative stage is a twenty-two-week plant. Breeders also quote the optimistic end of the range, since the longer end sells less seed.
Sativa lines take everywhere from ten weeks to more than twenty, and the longest line in the Haze Sativa Seeds range is at around 16 weeks from the switch. The catalogue can be sorted by this number, which is a reasonable first step for a room with a fixed timetable. A grower who adds four weeks on top of the figure the pack states is rarely caught out.
Terpinolene (the “sativa smell”)
A aromatic compound found in high amounts in many old sativa lines and accounting for most of the thing growers describe as the “sativa” aroma: green, woody, citrus and slightly floral at once. It is fragile, driven off quickly by hot drying, and it fades faster during storage than the earthier terpenes that lead most tent lines.
To a seed buyer the word does two things. When a listing lists terpinolene as the lead terpene, the strain probably carries substantial old-sativa ancestry whatever the percentage says. And when the you wants that smell to survive by the jar, the cure has to be slow and cool; a warm dry flattens a terpinolene line into something that smells of hay and no trace of what the pack described.
Intersex tendency
The appearance of pollen-bearing flowers on a female plant, typically towards the end in flower and frequently in response to stress. Almost every cannabis population has some capacity for do; long-flowering plants express it more often, and the reason is one simple reason: sixteen weeks of flower is fourteen weeks of exposure for a timer leak, a heat spike or a missed watering to set it off, and an old plant has already waited beyond its natural finish often throws a few late pollen flowers on its own in a final attempt to make seed.
None of this means a sativa strain weak as a matter of course; it makes the room’s consistency count for longer. Light-tight tents, stable conditions and harvesting when the plant is done and not two week later remove most of the risk. A listing that states the breeder screens parents for hermaphrodite traits is saying something worth hearing for a long-flowering line than on anything other category.
Foxtailing
The tendency of some flowers to grow fresh bud growth on top of existing ones, giving towered, irregular buds instead of round ones. In most tent-bred strains it is a heat symptom, usually caused by light that is too close or a room that is too high, and the standard response is to correct the cause.
In many sativas, above all Thai and some Haze lines, it is built in and will happen under a perfect room. A new sativa grower frequently spends weeks chasing a problem that was never there, lowering lights and temperatures and delaying an already long flower further. The listing rarely says which kind you should expect; the lineage usually does.