Sativa seeds come with more jargon attached than any other kind of cannabis seed, and a good deal of it means a certain thing to a botanist, something else to a breeder and a third to the grower standing in front of the listing. A disappointing sativa grow usually goes back to a word that was read in the wrong sense: a flowering time taken as a promise, a «sativa-dominant» tag read as a statement of effect, a landrace bought like it were a tent-bred 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 long-flowering end of the spectrum and that is where the words matter most; the meanings themselves apply to any sativa seed from any seller. They are in no particular order, since none of them is usable on its own without the rest.
Latitude (outdoor sativas)
The single number that determines whether a sativa will finish outdoors, and a number no pack prints. Equatorial lines need the autumn days to continue long enough to let the plant to ripen; in northern latitudes the frost comes first, and the grower cuts an half-finished plant in late October or loses it rot in November. The closer to the equator, in a northern hemisphere, the later the window runs, and coastal and subtropical gardens are able to finish plants that temperate growers never will.
The practical reading for a seed listing: an «outdoor» line harvest date is given for the breeder’s own latitude, usually somewhere in southern Europe or the western United States, and every step further north of it moves the finish back towards the weather. A grower above about the fiftieth parallel who is after a long-flowering sativa outdoors is shopping for a sativa autoflower or else a greenhouse, not a longer summer.
Sativa-dominant (the label)
The catalogue category rather than a measurable one. It generally indicates that more of a hybrid’s lineage are classed as sativa by whoever drafted the listing, and sometimes signals nothing more than that the buds are longer or the aroma brighter than the same breeder’s other lines.
The experience people associate with the word, clear-headed instead of heavy, is governed more by terpene profile and by THC content than it is by the sativa fraction, and a good number of «sativa-dominant» releases deliver a flat sleepy effect while plenty of the opposite lines deliver the opposite. For a grower the label is useful for a rough hint to growth habit, flowering time and stretch; as a predictor to how it feels it is close to useless unless accompanied by the terpene notes.
Stretch
The burst of upward growth which comes after the change to flowering. Most tent-bred plants add half again; sativas commonly double, and a few landrace types triple. The stretch continues three to four weeks and cannot be halted after it begins, merely redirected by training.
In practical terms, the stretch multiplier is the fact to read before deciding when to flip. A sativa switched at sixty centimetres inside a standard tent is touching the lamp by week four of flower; one flipped at thirty centimetres centimetres has room. Growers moving over from indica stock nearly always flip far too late the first time, and the consequence is written on the ceiling of the tent.
Hermaphroditism in long-flowering lines
The appearance of male flowers on a female plant, usually towards the end in flower and often in response to stress. Almost every cannabis line carries some tendency for it; sativa plants show it more, for a plain one: fourteen weeks of flower is fourteen weeks of exposure for a light leak, a heat spike or a missed watering to set it going, and a old that has waited past its intended end often produces a few late pollen flowers on its own as a final attempt to set seed.
Not one of these means a sativa strain unstable by nature; it makes the grower’s consistency matter for longer. Light-tight tents, stable temperatures and cutting the moment the plant is done rather than two weeks later remove the greater part 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.
Haze
In its first sense a particular line of plants put together in 1970s California from Colombian, Thai and Thai landraces, and then preserved and refined in the Netherlands. A true Haze grows tall, branches sparsely, takes for twelve to to sixteen weeks and carries a scent of incense, pine and something metallic that no line quite reproduces.
In its second sense «Haze» is any hybrid that contains some of that family, and today is a great many of the sativa-leaning market. A listing that reads «Haze» and gives no parents may be eighty percent original old family or one sixteenth of it, and the grow character follows the share, not the name. The useful question is never «is it a Haze» but «how much, and through which parent».
Landrace
A population of plants adapted over generations to one region by the local climate and climate alike, and not by deliberate selection. Colombian, Thai, Congolese and Oaxacan lines are the sativa examples. A landrace is variable, not a single plant: within a pack the flowering times, finishing times and smells range widely than in any tent-bred line, and that spread is the whole value of growing one.
The mistake is buying a landrace like a finished hybrid. It brings habits that make sense in an equatorial field, including height no tent can contain and a flowering rhythm tuned to an daylength most growers never provide. «Heirloom» on a listing generally means a landrace that has been grown out away from its origin for a number of generations, often with light selection towards indoor life; it is nearer to manageable but still not uniform. A shop offering «landrace» without an origin point and a reproduction count is using the word as a flavour, and the pack should be priced with that in mind.
Equatorial (the twelve-hour problem)
Refers to plants from latitudes where daylength barely changes across the year, and that the plant never evolved a sharp response to changing days. Such lines frequently flower slowly under a standard twelve-hour schedule, because twelve hours is, for them, a mild ordinary day and not a signal.
The working fix, handed down among sativa growers over decades, is to shorten the light further: eleven hours, occasionally ten, especially in the last weeks. It costs a yield yield and buys an earlier clearer finish. A listing that uses «equatorial» is telling you about this with one word, and a grower who reads it as a note on origin has missed the instruction hidden in it.
Flowering time
The figure of weeks from the start of flowering and harvest, which is the one most misunderstood figure on a sativa pack. For photoperiod seed it is measured from the day the light drops to twelve hours, rather than from germination, so a «fourteen-week» sativa started with an ordinary vegetative period is a five-month plant. Breeders additionally quote the shorter end of a range, since the other end sells less seed.
Sativa lines take anywhere from ten weeks to more than twenty, and the longest strain in the Haze Sativa Seeds range comes in at around 16 weeks after the flip. The catalogue can be sorted by this figure, which is a reasonable first step if you have a grower with a fixed timetable. A grower who adds four weeks on top of the figure the pack says is seldom disappointed.
Terpinolene
A terpene present in high proportion in many classic sativa lines and accounting for most of the thing people describe as a «sativa» aroma: green, piney, lemon and slightly sweet at once. It is volatile, driven off quickly through fast drying, and it fades faster in the cure than the earthier terpenes that dominate indica-leaning stock.
For a seed buyer the name does two jobs. When a listing lists terpinolene as the leading aromas, the line most likely carries substantial old-sativa ancestry whatever the label claims. And where the grower wants that smell to survive by the jar, the cure has to be cool and cool; a warm dry turns a terpinolene line to something that smells of very little and leaves no trace of what the pack promised.
Foxtailing (and when it is not a fault)
The habit of certain flowers to push out new calyx growth on top of old ones, giving spired, irregular buds rather than round ones. In the majority of tent-bred strains it is a heat response, typically caused by light that is too close or temperatures that is too high, and the standard response is to correct the room.
In many sativas, above all Thai and some Haze hybrids, it is built in and will happen under a flawless room. A new sativa grower frequently spends a month chasing a fault that was never a problem, dropping lights and temperatures and slowing a slow plant even more. The listing rarely says which kind you should expect; the parentage usually does.
