Sativa seeds arrive with more vocabulary attached than any other kind of cannabis seed, and most of it means a certain thing to a botanist, something else to a seed company and a third to the person standing in front of the listing. The failed sativa grow usually traces back to a word that was read in the wrong one of those senses: a flowering time read as a promise, a “sativa-dominant” label read as a statement of effect, a landrace bought like it were a modern hybrid. The entries below were written with the range at https://hazesativaseeds.com to hand for reference, since it runs strongly to the long-flowering 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 special order, because none of them makes sense without the rest.
Flowering time (and what it is counted from)
The number of weeks from the onset of flowering and harvest, and the one most misread number on a sativa pack. With photoperiod seed it is counted from the day the light is cut to twelve hours, rather than from germination, so a “fourteen-week” sativa grown after an ordinary vegetative period is a five-month plant. Seed companies also quote the optimistic end of the spread, because the longer end sells fewer seed.
Long-flowering lines run everywhere from ten weeks to well over twenty, and the slowest line in the Haze Sativa Seeds range is at about 16 weeks after the flip. The catalogue can be filtered by this figure, which is a sensible first pass if you have a grower on a tight timetable. A grower who adds four weeks on top of whatever the pack says is seldom disappointed.
Equatorial (the twelve-hour problem)
Describes lines out of latitudes where daylength barely varies across the year, which means that the plant never evolved a sharp response to changing days. These plants often flower slowly at a conventional twelve-hour light cycle, because twelve hours is, to them, a mild unremarkable day rather than a signal.
The working response, passed around among sativa growers over decades, is to cut the light more: eleven hours, sometimes ten, particularly during the final weeks. It costs a little yield and buys a earlier clearer finish. A listing which uses “equatorial” is warning you this with one word, and a grower who reads it as a note on geography has missed the point inside it.
Terpinolene (the “sativa smell”)
A terpene present in large amounts in a lot of old sativa strains and accounting for much of the thing growers mean as a “sativa” smell: green, piney, citrus and slightly floral all at once. It is fragile, lost quickly through hot drying, and terpinolene fades more quickly in the cure than the earthier terpenes that lead most tent lines.
For a seed buyer the word does two jobs. When a listing names terpinolene among the lead aromas, the strain most likely has real Haze-era ancestry whatever the percentage claims. And where the grower are after that profile to survive by the jar, the drying is going to be cool and slow; a warm drying room turns a terpinolene line to a flower that tastes of hay and leaves no trace of what the pack promised.
Stretch
The burst of upward growth which comes after the change to flowering. Indica-leaning plants add around half again; sativas routinely double, and some landrace types triple. The stretch continues two to five weeks and cannot be stopped after it has started, only redirected by training.
In tent terms, the stretch multiplier is the fact worth read before choosing when to switch. A sativa flipped at sixty centimetres in a two-metre tent is at the lamp by week four of flower; one flipped at thirty centimetres has room. Growers coming over from indica stock nearly always switch too late the first time, and the lesson is written on the ceiling of the tent.
Latitude (outdoor sativas)
The single figure that determines if a sativa can finish outdoors, and one that no pack prints. Long-flowering lines need the autumn days to continue late enough for the plant finish; in northern latitudes the frost arrives first, and the grower harvests a unripe plant in the end of October or loses it to mould in November. A closer to the equator, in the northern hemisphere, the later the season runs, and coastal or low-latitude growers can ripen lines that northern gardens cannot.
The practical rule for a seed pack: an “outdoor” line finishing month is given for the breeder’s own latitude, normally somewhere within temperate Europe or the western United States, and every degree further north of that moves the finish back towards the weather. A grower north of about the fiftieth parallel that wants a long-flowering sativa outdoors is shopping for an autoflower or else a covered space, and not a better summer.
Intersex tendency
The production of male flowers on a female plant, usually towards the end in flower and frequently under stress. Almost every cannabis population carries some tendency to do; sativa plants express it more, and the reason is a simple one: sixteen weeks of flower is fourteen weeks of exposure for a timer leak, a heat spike or a late watering that can set it going, and an plant plant has gone beyond its natural end often produces a few late male flowers on its own as a final attempt to make seed.
None of this means a sativa strain weak by nature; it makes the grower’s discipline matter for a longer stretch. Light-tight room, steady temperatures and cutting when the plant is done and not two week after remove most of the risk. A listing that states the breeder tests parents for intersex tendency is worth worth hearing on a sativa than on any other category.
Foxtailing (and when it is not a fault)
The habit of certain flowers to grow new bud clusters on top of old ones, giving spired, open buds instead of dense ones. In the majority of tent-bred lines it is a stress symptom, usually from light that is too close or a room too high, and the advice is to fix the cause.
In a good number of sativas, above all Thai and certain Haze lines, it is genetic and will occur in a flawless room. A first-time sativa grower often spends a month chasing a problem that was never not a problem, lowering lights and heat and delaying a long plant further. The breeder rarely warns which type to expect; the lineage generally does.
Haze
Originally a particular line of plants put together in 1970s California from Colombian, Colombian and South Indian landraces, and then kept and refined in the Netherlands. The Haze grows tall, fills out openly, flowers for twelve to sixteen weeks and carries a scent of incense, pine and a note metallic that no other line exactly has.
In its looser sense “Haze” is any hybrid that contains some of that family, and by now is a great many of the sativa-leaning catalogue. A listing that says “Haze” without parents may be mostly percent original classic family or one small fraction of it, and the grow character tracks the fraction, not the name. The useful question is not “is it a Haze” but “how much, and via which parent”.
Landrace versus heirloom
A population of plants shaped through centuries to one place by the local climate and climate together, and not by deliberate selection. Colombian, Thai, Congolese and Oaxacan lines are the classic sativa examples. A landrace is a spread, rather than a single plant: inside a pack the flowering times, flowering times and smells range widely than in any tent-bred hybrid, and that variation is the whole value of keeping one.
The trap is treating a landrace like a finished hybrid. It carries traits that made sense in an open field, such as height no tent can hold and a flowering clock tuned to an daylength most growers never offer. “Heirloom” on a listing generally refers to a landrace that has been grown out somewhere for a number of generations, often with light selection towards indoor conditions; it is nearer to manageable but still far from uniform. A seller listing “landrace” that does not give an collection point and a reproduction history is using the word as a flavour, and the seeds should be judged with that in mind.
