Sativa seeds come with more jargon attached than any other category of cannabis seed, and most of it means one thing to a botanist, something else to a seed company and something different again to the person trying to make a decision in front of the listing. 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 fixed number, a “sativa-dominant” label taken as a description of effect, a landrace chosen as if it were a modern hybrid. The entries below are put together with the range at https://hazesativaseeds.com to hand for reference, because it runs heavily to the long-flowering end of the category and that is where the vocabulary matter most; the meanings though hold to any sativa seed from any seller. They are given in no special order, because not one of them is usable without the others.
Foxtailing
The habit of certain flowers to push out fresh bud growth on top of existing ones, producing spired, open buds rather than round ones. In the majority of indica-leaning lines it is a stress symptom, typically from light too close or a room too high, and the advice is to fix the room.
In a good number of sativas, especially Southeast Asian and certain Haze lines, it is genetic and is going to happen in a flawless room. A new sativa grower frequently spends weeks hunting a problem that is a problem, dropping lights and heat only slowing a slow plant even more. The breeder rarely warns which type you should expect; the lineage usually tells you.
Stretch (the doubling)
The surge of vertical growth that follows the change to flowering. Indica-leaning plants gain half their height again; sativas routinely double, and some equatorial lines triple. The stretch lasts two to five weeks and will not be stopped after it has started, only redirected by training.
In tent terms, a stretch multiplier is the number worth reading ahead of deciding when to flip. A sativa switched at sixty centimetres in a two-metre tent is at the lamp before week four of flower; one flipped at thirty centimetres centimetres has room. Growers moving from indica stock almost always switch too late the first time, and the consequence is written on the ceiling of the tent.
Landrace
A population of plants shaped through centuries to a particular place by the local climate and climate together, rather than by modern breeding. Colombian, Colombian, Malawian and Mexican stock are the sativa examples. A landrace is variable, rather than a single plant: within a pack the heights, finishing times and smells range widely than a tent-bred line, and that spread is the whole value of growing one.
The trap is buying a landrace as a modern product. It brings habits that make sense in an equatorial field, including a frame no tent can contain and a flowering rhythm set to a daylength most growers cannot offer. “Heirloom” on a listing usually means a landrace that has been reproduced away from its origin for a number of generations, typically with light selection for indoor life; it is closer to usable but still far from uniform. A seller listing “landrace” without an origin region and a generation history is applying the word loosely, and the seeds should be judged with that in mind.
Terpinolene (the “sativa smell”)
A terpene present in high amounts in many old sativa lines and responsible for much of the thing people describe as the “sativa” aroma: green, piney, citrus and faintly floral all at once. It is volatile, driven off easily through hot drying, and terpinolene fades faster in the cure than the heavier terpenes which dominate indica-leaning lines.
To a seed buyer the word does two things. Where a listing lists terpinolene as the lead terpene, the line most likely has substantial old-sativa ancestry regardless of what the percentage claims. And when the grower wants that smell to survive to the jar, the drying is going to be slow and slow; a fast dry turns a terpinolene line to something that tastes of hay and no trace of what the pack promised.
Latitude (outdoor sativas)
The single number that decides if a sativa will ripen outdoors, and one no pack states. Equatorial lines need the run of shortening days to go on long enough to let the plant finish; in high latitudes the frost arrives first, and the grower harvests an unripe plant in late October or else loses it to mould in November. The further to the equator, within a northern hemisphere, the longer the window runs, and Mediterranean and subtropical growers can finish lines that northern growers cannot.
The practical rule of a seed listing: an “outdoor” line harvest month is given for the breeder’s home latitude, usually somewhere in temperate Europe or the west coast of the United States, and every step further north of that moves the finish back into the weather. A grower north of about the fiftieth parallel that is after a true sativa in the garden needs to be shopping for a sativa autoflower or a covered space, and not a better season.
Hermaphroditism in long-flowering lines
The appearance of pollen-bearing flowers on a female plant, usually late in flower and frequently under stress. Almost every cannabis population carries a degree of capacity for do; sativa lines show it more, and the reason is a simple reason: sixteen weeks of flower is fourteen weeks of exposure for a light leak, a heat spike or a missed watering that can trigger it off, and an old plant has already gone beyond its natural end often throws a few late male flowers on its own in a last effort to make seed.
None of these means a sativa line weak by course; it means the room’s consistency matter for a longer stretch. Light-tight room, stable conditions and cutting the moment the plant is done rather than two week after take away the greater part of the risk. A listing which mentions a breeder screens parents for intersex tendency is worth worth hearing on a long-flowering line than for any else.
Haze
Originally a specific line of plants bred in 1970s California from Colombian, Thai and Thai landraces, and later preserved and worked in the Netherlands. The Haze grows tall, branches sparsely, takes for twelve to sixteen weeks and smells of spice, pine and something metallic that no other other line quite has.
In its second sense “Haze” is whatever cross that contains some of that family, and by now is most of the sativa-leaning catalogue. A listing which reads “Haze” without parents may be mostly percent the classic family or a sixteenth of it, and the grow time tracks the share, not the name. The useful question is not “is it a Haze” but “how much, and through which parent”.
Sativa-dominant (the label)
A marketing term and not a botanical one. The phrase generally indicates that more of a hybrid’s lineage are described as sativa by the breeder who wrote the description, which occasionally signals no more than a certain the buds are airier or the aroma sharper than the same breeder’s other lines.
The experience people connect with the word, clear-headed rather than sedating, is governed more by terpene chemistry and by cannabinoid content than by ancestry, and a good number of “sativa-dominant” releases produce a heavy sleepy effect and a good number of indica-labelled stock deliver exactly the reverse. For a grower the percentage is worth something as a loose hint to growth habit, flowering time and stretch; for a predictor to effect it is close to useless without the terpene description.
Equatorial
Refers to lines from latitudes where daylength hardly changes through the year, and that the plant does not evolved a sharp response to shortening days. These plants often start flowering reluctantly under a conventional twelve-hour schedule, since twelve hours is, for them, a mild unremarkable day rather than a signal.
The practical fix, handed down between sativa growers for decades, is to shorten the light further: eleven hours, occasionally ten, especially in the last weeks. It costs a yield yield and gains an earlier clearer end. A listing which says “equatorial” is telling you this with one word, and a grower who reads it as a note on geography has missed the instruction inside it.