Sativa seeds arrive with more jargon around them than any other category of cannabis seed, and a good deal of it means one thing to a botanist, something else to a seed company and a third to the person trying to make a decision in front of the listing. The disappointing sativa grow usually goes back to a word that was understood in the wrong sense: a flowering time read as a promise, a “sativa-dominant” tag read as a statement of character, a landrace bought like it were a tent-bred hybrid. The entries below are written with the range at https://hazesativaseeds.com open as reference, since it runs strongly to the classic end of the category where the words matter most; the definitions themselves apply to any sativa seed from any shop. They are in no special order, since none of them makes usable without the rest.
Hermaphroditism in long-flowering lines
The appearance of male flowers on a female plant, usually late in flower and often in response to stress. Almost every cannabis population carries some capacity to do; long-flowering plants show it more, and the reason is a plain reason: fourteen weeks of flower is fourteen weeks of opportunity for a light leak, a heat spike or a missed watering to set it off, and a plant that has already waited beyond its natural end often throws a few late pollen flowers on its own as a final effort to set seed.
None of these makes a sativa strain unstable as a matter of nature; it makes the room’s consistency count over a longer stretch. A sealed room, stable conditions and harvesting when the plant is done and not two week later remove most of the risk. A listing which mentions a breeder tests parents for hermaphrodite traits is saying something worth hearing on a long-flowering line than on any else.
Equatorial
Refers to lines out of regions in which daylength barely changes across the year, and that the plant never evolved a sharp response to changing days. These plants often start flowering reluctantly at a conventional twelve-hour schedule, since twelve hours is, for them, a mild ordinary day rather than a signal.
The practical fix, passed around among sativa growers over decades, is to shorten the light more: eleven hours, occasionally ten, especially during the final weeks. It costs some yield yield and gains a more decisive finish. A listing which uses “equatorial” is telling you this in one word, and a grower who takes it as a note on geography has missed the instruction inside it.
Sativa-dominant
A marketing term and not a botanical one. It generally indicates that more of a hybrid’s parents were classed as sativa by the breeder who drafted the listing, and sometimes means no more than that the flowers are longer or the aroma brighter than the same breeder’s other lines.
The effect people associate with the word, lively rather than sedating, is driven more by terpene chemistry and the THC content than by ancestry, and plenty of “sativa-dominant” hybrids deliver a flat couch effect while plenty of the opposite stock do exactly the opposite. To a buyer the label is worth something as a loose hint to growth habit, flowering time and stretch; for a guide to how it feels it is close to useless without the aroma description.
Haze (the family, not the smell)
In its first sense a particular line of plants put together in 1970s California from Colombian, Colombian and Thai landraces, and then kept and worked in the Netherlands. A true Haze grows tall, branches openly, takes for twelve to sixteen weeks and smells of spice, pine and a note sharp that no other line exactly has.
In its second sense “Haze” is whatever cross which carries some 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 classic family or a sixteenth of it, and the flowering 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 determines if a sativa can ripen outdoors, and a number that no pack states. Long-flowering plants need a run of shortening days to continue long enough for the plant ripen; at northern latitudes the frost arrives before that, and the grower cuts an half-finished plant in the end of October or watches it to mould in November. The further south, in a northern hemisphere, the later the season stretches, and coastal or subtropical gardens are able to finish plants that temperate gardens cannot.
The practical rule for a seed listing: an “outdoor” line finishing month is stated for the breeder’s home latitude, usually somewhere in southern Europe or the western United States, and every degree further north of that pushes the finish later into the weather. A grower north of about the fiftieth parallel who is after a long-flowering sativa in the garden is looking for an autoflower or a covered space, and not a better season.
Landrace
A population of plants shaped over centuries to one region by the local growers and climate together, and not by modern breeding. Thai, Thai, Malawian and Mexican stock are the sativa cases. A landrace is a spread, not a one plant: within a pack the flowering times, flowering times and aromas spread far more than a tent-bred line, and this spread is the point of keeping one.
The mistake is buying a landrace as a modern hybrid. It brings traits that made sense in an equatorial field, such as a frame no tent can contain and a flowering clock tuned to an daylength the majority of growers never offer. “Heirloom” in a listing usually refers to a landrace that has been reproduced away from its origin over some generations, typically with a degree of selection for indoor conditions; it is nearer to manageable but still not uniform. A shop offering “landrace” without a collection point and a generation history is applying the word loosely, and the seeds should be judged accordingly.
Foxtailing
The habit of certain flowers to push out new calyx clusters on top of existing ones, producing spired, open buds instead of round ones. In the majority of tent-bred strains it is a stress symptom, typically caused by light too close or a room that is too high, and the standard response is to fix the cause.
In many sativas, above all Southeast Asian and some Haze hybrids, it is genetic and is going to occur in a perfect room. A new sativa grower often wastes weeks hunting a problem that was never not there, dropping lights and temperatures only delaying an already long plant even more. The breeder seldom says which type to expect; the lineage generally does.
Stretch (the doubling)
The burst of upward growth that follows the change to flowering. Indica-leaning plants add around half again; sativas routinely double, and some equatorial types triple. The stretch continues two to five weeks and will not be stopped after it begins, merely bent sideways by training.
In tent terms, a stretch figure is the number worth read ahead of deciding when to flip. A sativa flipped at sixty centimetres in a standard tent is touching the lamp before week four of flower; one switched at thirty centimetres has room. Growers moving over from indica stock nearly always switch too late the first time, and the consequence is written on the ceiling of the tent.
Terpinolene (the “sativa smell”)
A aromatic compound present in high proportion in many classic sativa lines and accounting for much of what growers mean as the “sativa” aroma: fresh, woody, citrus and faintly floral all at once. It is fragile, lost quickly by fast drying, and terpinolene degrades faster during storage than the heavier terpenes that lead most tent stock.
For a seed buyer the name earns two jobs. When a listing names terpinolene as the lead aromas, the strain probably carries real old-sativa genetics regardless of what the label says. And where the you wants that smell to still be there by the jar, the drying is going to be cool and slow; a warm drying room flattens a terpinolene line to a flower that tastes of very little and no trace of what the pack promised.
Flowering time (and what it is counted from)
The number of weeks between the start of flowering and maturity, which is the one most frequently misunderstood number 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 ordinary vegetative stage is a five-month plant. Seed companies additionally quote the optimistic end of the range, because the other end sells less seed.
Sativa plants run everywhere from ten weeks to well over twenty, and the slowest strain in the Haze Sativa Seeds range comes in at about 16 weeks after the flip. The catalogue can be filtered by that figure, which is the sensible first pass for a grower on a fixed schedule. A grower who allows four weeks on top of the figure the pack says is rarely caught out.