Sativa seeds arrive with more jargon attached than any other category of cannabis seed, and most of it means one thing to a botanist, another to a breeder and a third to the grower trying to make a decision in front of the listing. A failed sativa grow nearly always goes back to a word that was read in the wrong sense: a flowering time read as a promise, a “sativa-dominant” label read as a description of character, a landrace bought as if it were a tent-bred hybrid. The entries below are put together with the range at https://hazesativaseeds.com open as reference, since it runs heavily to the classic end of the category where the vocabulary matter most; the meanings though hold to any sativa seed from any seller. They are given in no special order, since not one of them is sense on its own without the others.
Intersex tendency
The production of pollen-bearing flowers on a female plant, typically late in flower and frequently under stress. Every cannabis line has some tendency to do; sativa plants express it more often, for a simple one: fourteen weeks of flower is fourteen weeks of opportunity for a light leak, a temperature spike or a missed watering to trigger it off, and an plant that has gone beyond its natural end often produces a few late pollen sacs on its own as a last attempt to make seed.
Not one of this makes a sativa strain weak by nature; it makes the grower’s consistency count over longer. Light-tight room, steady temperatures and harvesting the moment the plant is done rather than two week later take away most of the risk. A listing that mentions the breeder screens parents for hermaphrodite tendency is worth more on a long-flowering line than for anything else.
Landrace
A population of plants shaped through centuries to one region by local climate and growers together, and not by deliberate selection. Thai, Colombian, Malawian and Mexican lines are the sativa examples. A landrace is variable, not a one plant: within a pack the heights, finishing times and aromas spread far more than in any tent-bred line, and this spread is the point of growing one.
The mistake is buying a landrace as a finished product. It brings habits that made sense in an open field, such as a frame that no tent can hold and a flowering rhythm tuned to a equatorial daylength the majority of growers never offer. “Heirloom” in a listing usually refers to a landrace that has been grown out away from its origin over a number of generations, typically with light selection towards indoor conditions; it is nearer to manageable but nonetheless not a hybrid. A shop offering “landrace” without an origin region and a reproduction count is applying the word as a flavour, and the pack should be priced with that in mind.
Flowering time
The figure of weeks between the start of flowering and maturity, which is the one most frequently misunderstood number on a sativa pack. For photoperiod seed it is measured from the day the light is cut to twelve hours, rather than from germination, so a “fourteen-week” sativa started after an eight-week vegetative stage is a five-month plant. Seed companies also give the shorter end of the range, since the longer end sells less seed.
Sativa lines run everywhere from ten weeks to well over twenty, and the longest strain in the Haze Sativa Seeds range is at around 16 weeks after the flip. The catalogue can be sorted by this figure, which is the reasonable first pass for a room on a tight schedule. A grower who allows four weeks on top of the figure the pack says is rarely caught out.
Sativa-dominant (the label)
A marketing category rather than a measurable one. The phrase usually indicates that the larger share of a hybrid’s parents are classed as sativa according to the breeder who wrote the description, which sometimes signals no more than that the buds are airier or the smell brighter than the that breeder’s other releases.
The experience people connect with the word, clear-headed instead of heavy, is governed more by terpene profile and by cannabinoid balance than by the sativa fraction, and a good number of “sativa-dominant” releases deliver a heavy couch effect while a good number of the opposite stock do the opposite. For a buyer the label is useful for a loose hint to growth habit, flowering time and stretch; for a predictor to how it feels it is next to worthless without the terpene description.
Equatorial (the twelve-hour problem)
Refers to lines from latitudes in which daylength hardly varies through the year, and that the plant does not develop a sharp response to changing days. These plants frequently start flowering slowly under a standard twelve-hour schedule, since twelve hours is, for them, an ordinary day rather than a signal.
The working response, passed down among sativa growers for decades, is to cut the light more: eleven hours, occasionally ten, particularly in the final weeks. It costs some little yield and gains an earlier decisive finish. A listing which says “equatorial” is telling you this in one word, and a grower that takes it as a note on geography misses the point inside it.
Haze (the family, not the smell)
In its first sense a particular family of plants bred in 1970s California from Mexican, Thai and South Indian parents, and later kept and refined in the Netherlands. A true Haze grows tall, fills out openly, flowers for twelve sixteen weeks and carries a scent of spice, citrus and a note metallic that no other line exactly reproduces.
In its second sense “Haze” is whatever hybrid which carries some of that family, and today is most of the sativa-leaning catalogue. A listing that says “Haze” without parents may be eighty percent original classic family or a small fraction of it, and the flowering character follows the share, not the name. The working question is not “is it a Haze” but “how much, and through which parent”.
Terpinolene (the “sativa smell”)
A aromatic compound present in large proportion in a lot of old sativa strains and accounting for most of the thing people mean as the “sativa” aroma: fresh, piney, lemon and slightly sweet all at once. It is fragile, lost quickly by fast drying, and it degrades faster during the cure than the earthier terpenes that dominate most tent stock.
For a seed buyer the word earns two jobs. Where a listing lists terpinolene among the lead aromas, the strain most likely carries substantial old-sativa ancestry regardless of what the label says. And when the you are after that profile to survive by the jar, the drying has to be slow and slow; a warm drying room turns a terpinolene line into something that tastes of hay and nothing of what the pack described.
Foxtailing (and when it is not a fault)
The tendency of certain flowers to grow fresh calyx growth on top of old ones, producing towered, open buds rather than round ones. In most indica-leaning strains it is a stress response, usually caused by light that is too close or temperatures that is too high, and the standard response is to fix the cause.
In a good number of sativas, especially Southeast Asian and certain Haze hybrids, it is genetic and is going to occur in a flawless room. A first-time sativa grower frequently spends a month hunting a problem that was never a problem, lowering lights and temperatures and slowing a slow flower further. The breeder seldom warns which type to expect; the parentage usually does.
Latitude
The single figure that decides whether a sativa can ripen outdoors, and a number no pack states. Equatorial plants require a run of shortening days to go on long enough to let the plant finish; in northern latitudes the frost comes first, and the grower harvests an half-finished plant in the end of October or loses it to mould in November. A closer south, in a northern hemisphere, the later the window stretches, and Mediterranean or subtropical growers can finish plants that northern growers never will.
The practical rule of a seed listing: an “outdoor” sativa finishing date is stated for the breeder’s own latitude, normally a point within southern Europe or the west coast of the United States, and each step north of that pushes the finish later towards the frost. A grower above about the fiftieth parallel who wants a true sativa in the garden needs to be shopping for a sativa autoflower or else a greenhouse, and not a better summer.