Sativa seeds arrive with more jargon attached than any other kind of cannabis seed, and a good deal of it means one thing to a botanist, another to a breeder and something different again to the grower trying to make a decision in front of the pack. The failed sativa grow nearly always goes back to a word that was understood in the wrong one of those senses: a flowering time read as a promise, a “sativa-dominant” tag read as a statement of character, a landrace chosen as if it were a tent-bred hybrid. The entries below are written with the range at https://hazesativaseeds.com to hand for the concrete examples, because it runs heavily towards the classic end of the category where the vocabulary carry the most weight most; the meanings themselves hold to any sativa seed from any shop. They are given in no particular order, because none of them makes sense on its own without the rest.
Latitude (outdoor sativas)
The one number that determines whether a sativa will finish outdoors, and a number no pack states. Equatorial plants need the run of shortening days to continue late enough to let the plant ripen; in northern latitudes the frost comes before that, and the grower harvests a unripe plant in the end of October or watches it to mould in November. A closer south, in a northern hemisphere, the longer the season runs, and coastal and low-latitude gardens can ripen plants that northern gardens cannot.
The usable reading of a seed pack: an “outdoor” sativa finishing month is given for the breeder’s own latitude, usually a point within southern Europe or the west coast of the United States, and every degree north of that moves the date later towards the frost. A grower north of roughly the fiftieth parallel that wants a true sativa outdoors needs to be shopping for an autoflower or else a covered space, and not a longer season.
Flowering time
The number of weeks from the onset of flowering and maturity, and the one most frequently misread number on a sativa pack. With photoperiod seed it is measured from the day the light is cut to twelve hours, not from sowing, so a “fourteen-week” sativa started after an eight-week vegetative stage is a twenty-two-week plant. Breeders also quote the shorter end of a range, because the other end sells fewer seed.
Sativa lines run everywhere from ten weeks to well over twenty, and the slowest strain in the Haze Sativa Seeds range is at around 16 weeks from the flip. The catalogue can be sorted by this number, which is a reasonable first pass if you have a grower on a fixed schedule. A grower who adds four weeks to whatever the pack states is rarely disappointed.
Stretch (the doubling)
The surge of upward growth which follows the switch to flowering. Most tent-bred plants add around half their height again; sativas commonly double, and some landrace lines go further. The stretch lasts three to four weeks and cannot be halted after it has started, only redirected by training.
In practical terms, the stretch figure is a fact worth reading before deciding when to flip. A sativa switched at sixty centimetres inside a standard tent is at the lamp by week four of flower; one flipped at thirty centimetres centimetres has room. Growers moving from indica stock almost always flip far too late the first time, and the consequence is written on the ceiling of the tent.
Terpinolene (the “sativa smell”)
A aromatic compound found in high proportion in a lot of old sativa strains and responsible for much of what people mean as a “sativa” smell: fresh, woody, lemon and faintly floral all at once. It is fragile, lost quickly by hot drying, and terpinolene fades faster in the cure than the heavier terpenes that dominate indica-leaning lines.
For a seed buyer the name does two jobs. Where a listing lists terpinolene as the leading aromas, the strain most likely has substantial Haze-era genetics regardless of what the percentage says. And where the grower are after that smell to survive by the jar, the drying has to be slow and cool; a fast dry turns a terpinolene line into a flower that tastes of hay and no trace of what the pack promised.
Equatorial
Refers to lines out of latitudes where daylength barely changes through the year, and where the plant does not develop a sharp reaction to shortening days. These lines often start flowering reluctantly under a conventional twelve-hour schedule, because twelve hours is, to them, an ordinary day and not a signal.
The practical fix, passed down among sativa growers for decades, is to shorten the light more: eleven hours, occasionally ten, especially during the last weeks. It costs some yield yield and gains an more decisive end. A listing that uses “equatorial” is warning you this in one word, and a grower that takes it as a note on geography misses the point hidden in it.
Landrace versus heirloom
A population of plants shaped through generations to a particular place by local climate and climate together, rather than by modern breeding. Colombian, Thai, Malawian and Oaxacan lines are the classic sativa cases. A landrace is variable, rather than a one plant: inside a pack the flowering times, finishing times and aromas spread far more than a tent-bred line, and this spread is the point of growing one.
The trap is buying a landrace as a modern hybrid. It brings traits that made sense in an open field, such as height no tent can hold and a flowering clock set to an equatorial daylength most growers cannot provide. “Heirloom” in 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 nearer to manageable but still not a hybrid. A seller offering “landrace” without an collection region and a reproduction history is applying the word as a flavour, and the pack should be priced with that in mind.
Haze
In its first sense a particular line of plants bred in 1970s California from Colombian, Thai and South Indian parents, and later kept and refined in the Netherlands. The Haze grows tall, branches openly, takes for twelve to sixteen weeks and smells of incense, citrus and a note sharp that no other other line exactly reproduces.
In its second sense “Haze” is whatever cross which contains a share of that family, and by now is most of the sativa-leaning market. A listing which says “Haze” without parents could be mostly percent the old family or one sixteenth of it, and the grow time tracks the fraction, not the name. The working question is not “is it a Haze” but “how much, and via which parent”.
Intersex tendency
The appearance of pollen-bearing flowers on a female plant, usually late in flower and frequently in response to stress. Almost every cannabis line has a degree of capacity to it; long-flowering lines express it more often, for one simple reason: sixteen weeks of flower is fourteen weeks of opportunity for a timer leak, a temperature spike or a late watering to trigger it going, and an old plant has gone past its intended end frequently produces a few late pollen flowers on its own as a final effort to make seed.
Not one of this means a sativa strain weak by course; it means the grower’s consistency count for a longer stretch. A sealed room, stable temperatures and cutting the moment the plant is ready rather than a weeks after take away most of the risk. A listing which states the breeder screens parents for hermaphrodite tendency is saying something worth hearing on a sativa than for any other category.
Sativa-dominant (the label)
A catalogue term and not a botanical one. The phrase usually means that more of a hybrid’s lineage are classed as sativa according to the breeder who wrote the description, which sometimes means nothing more than a certain the flowers are airier or the aroma brighter than the that breeder’s indica-labelled releases.
The effect people associate with a word, clear-headed rather than sedating, is driven more by terpene profile and by THC balance than by ancestry, and a good number of “sativa-dominant” releases produce a flat couch result and plenty of indica-labelled lines deliver the reverse. For a buyer the label is worth something as a loose hint to growth habit, flowering time and stretch; for a predictor to how it feels it is close to worthless without the aroma description.