Sativa seeds come with more jargon attached than any other category of cannabis seed, and a good deal of it means one thing to a botanist, something else to a breeder and a third to the grower standing in front of the listing. The failed sativa grow usually 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 read as a description of character, a landrace bought like it were a modern hybrid. The entries below were put together with the range at https://hazesativaseeds.com to hand as the concrete examples, because it runs strongly towards the classic end of the category and that is where the words carry the most weight most; the definitions themselves apply to any sativa seed from any shop. They are in no special order, because none of them makes sense without the others.
Foxtailing
The habit of certain flowers to push out new bud growth on top of existing ones, giving spired, open buds instead of round ones. In the majority of indica-leaning strains it is a heat response, typically caused by light too close or temperatures too high, and the standard response is to correct the room.
In a good number of sativas, above all Thai and some Haze hybrids, it is built in and is going to happen in a perfect room. A new sativa grower frequently spends a month hunting a fault that was never not a problem, lowering lights and temperatures and slowing a slow plant further. The listing rarely warns which kind to expect; the lineage usually does.
Flowering time
The figure of weeks between the start of flowering and harvest, and the one most frequently 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 grown after a ordinary vegetative stage is a twenty-two-week plant. Seed companies additionally give the shorter end of the range, because the longer end sells less seed.
Sativa plants run everywhere from ten weeks to well over twenty, and the longest line in the Haze Sativa Seeds range is at around 16 weeks from the flip. The catalogue can be filtered by that number, which is the sensible first step for a grower with a tight timetable. A grower who adds four weeks on top of the figure the pack says is rarely disappointed.
Hermaphroditism in long-flowering lines
The appearance of pollen-bearing flowers on a female plant, usually towards the end in flower and frequently under stress. Every cannabis line has some capacity for do; long-flowering lines show it more often, for a plain one: fourteen weeks of flower is sixteen weeks of opportunity for a light leak, a heat spike or a missed watering that can set it going, and an plant plant has waited beyond its intended finish often throws a few late pollen flowers on its own in a last effort to set seed.
Not one of this makes a sativa line weak as a matter of nature; it makes the room’s discipline count over a longer stretch. Light-tight tents, steady temperatures and harvesting the moment the plant is done rather than a weeks after take away most of the risk. A listing that mentions a breeder screens parents for hermaphrodite traits is saying something more for a sativa than on any other category.
Terpinolene
A terpene present in high proportion in a lot of old sativa lines and responsible for much of the thing people mean as the “sativa” smell: green, woody, citrus and slightly sweet all at once. It is fragile, driven off easily through fast drying, and it fades more quickly in storage than the earthier terpenes which dominate most tent lines.
For a seed buyer the word earns two jobs. Where a listing lists terpinolene as the leading terpene, the line probably has real old-sativa genetics regardless of what the label says. And when the you are after that smell to survive to the jar, the cure has to be slow and cool; a warm drying room flattens a terpinolene line to something that smells of very little and leaves nothing of what the pack promised.
Latitude
The one figure that decides whether a sativa will ripen outdoors, and a number no pack states. Equatorial plants need the run of shortening days to continue late enough for the plant ripen; at northern latitudes the frost arrives before that, and the grower harvests a unripe plant in late October or else watches it to mould in November. The further to the equator, within a northern hemisphere, the longer the season stretches, and Mediterranean or subtropical gardens can ripen lines that northern growers never will.
The practical rule of a seed pack: an “outdoor” line harvest date is given for the breeder’s home latitude, usually somewhere in temperate Europe or the west coast of the United States, and each step further north of it moves the finish back into the frost. A grower above roughly the fiftieth parallel who is after a true sativa in the garden needs to be looking for a sativa autoflower or a greenhouse, not a longer summer.
Landrace versus heirloom
A population of plants adapted over centuries to a particular place by the local growers and growers alike, rather than by modern breeding. Thai, Colombian, Congolese and Oaxacan lines are the classic sativa cases. A landrace is variable, not a single plant: within a pack the heights, finishing times and aromas range widely than in a tent-bred line, and that spread is the point of keeping one.
The mistake is treating a landrace like a finished hybrid. It brings habits that made sense in an open field, including height that no tent can hold and a flowering rhythm set to an daylength most growers cannot offer. “Heirloom” in a listing generally means a landrace that has been reproduced somewhere over a number of generations, typically with light selection towards indoor conditions; it is closer to manageable but still not a hybrid. A shop listing “landrace” that does not give a collection region and a reproduction history is using the word as a flavour, and the pack should be priced with that in mind.
Stretch (the doubling)
The surge of upward growth which comes after the switch to flowering. Indica-leaning plants add half again; sativas commonly double, and some equatorial types triple. The stretch continues three to four weeks and cannot be stopped after it has started, only bent sideways by training.
In tent terms, a stretch figure is the number to read 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 has room. Growers coming over from indica strains nearly always switch too late the first time, and the lesson is visible on the ceiling of the tent.
Haze (the family, not the smell)
Originally a specific family of plants bred in 1970s California from Mexican, Colombian and South Indian landraces, and then kept and refined in the Netherlands. A true Haze runs tall, fills out sparsely, flowers for twelve sixteen weeks and carries a scent of incense, pine and something metallic that no other line quite reproduces.
In its looser sense “Haze” is whatever hybrid which carries a share of that family, which by now is most of the sativa-leaning market. A listing that says “Haze” and gives no lineage may be eighty percent original old family or one small fraction of it, and the grow time follows the share, not the name. The working question is never “is it a Haze” but “how much, and through which parent”.
Equatorial
Refers to lines out of regions where daylength barely changes through the year, which means that the plant does not develop a sharp reaction to shortening days. These lines frequently start flowering reluctantly under a conventional twelve-hour schedule, because twelve hours is, for them, an ordinary day and not a signal.
The practical fix, passed around between sativa growers over decades, is to shorten the light further: eleven hours, occasionally ten, especially during the final weeks. It loses a little yield and buys a earlier decisive end. A listing that says “equatorial” is warning you about this in one word, and a grower who takes it as a note on geography has missed the instruction hidden in it.
