Sativa seeds come with more vocabulary attached than any other kind of cannabis seed, and most of it means one thing to a botanist, another to a seed company and a third to the person standing in front of the pack. A 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 » tag taken as a statement of effect, a landrace bought like it were a modern hybrid. The entries below were put together with the range at https://hazesativaseeds.com open for reference, because it leans strongly towards the long-flowering end of the spectrum where the words carry the most weight most; the meanings though hold to any sativa seed from any seller. They are given in no special order, because none of them makes sense without the rest.
Haze (the family, not the smell)
In its first sense a particular family of plants bred in 1970s California from Mexican, Thai and Thai landraces, and then kept and worked in the Netherlands. A true Haze runs tall, fills out openly, flowers for twelve sixteen weeks and carries a scent of incense, pine and a note sharp that no other line quite reproduces.
In its looser sense « Haze » is any cross which carries some of that family, and by now is a great many of the sativa-leaning catalogue. A listing that says « Haze » without lineage may be eighty percent original old family or one small fraction of it, and the grow character tracks the share, not the name. The working question is not « is it a Haze » but « how much, and via which parent ».
Flowering time (and what it is counted from)
The figure of weeks from the onset of flowering and maturity, and the one most misunderstood number on a sativa pack. For photoperiod seed it is measured from the day the light drops to twelve hours, not from germination, so a « fourteen-week » sativa grown after an eight-week vegetative period is a five-month plant. Breeders also quote the optimistic end of a spread, because the longer end sells fewer seed.
Long-flowering lines take everywhere from ten weeks to well over twenty, and the slowest strain in the Haze Sativa Seeds range is at about 16 weeks from the switch. The catalogue can be sorted by that figure, which is the reasonable first pass for a grower with a fixed schedule. A grower who allows four weeks to whatever the pack states is seldom caught out.
Hermaphroditism in long-flowering lines
The production of male flowers on a female plant, usually towards the end in flower and frequently under stress. Every cannabis line has a degree of tendency for do; sativa lines show it more, for one plain one: fourteen weeks of flower is fourteen weeks of opportunity for a timer leak, a heat spike or a missed watering that can set it going, and an old plant has already gone past its intended end often throws a few late pollen flowers on its own as a final effort to set seed.
Not one of these means a sativa strain weak by course; it means the grower’s discipline count over longer. A sealed room, stable temperatures and cutting when the plant is done rather than a week later take away most of the risk. A listing that mentions the breeder tests parents for hermaphrodite traits is worth worth hearing for a long-flowering line than on anything else.
Latitude
The one figure that determines whether a sativa will ripen outdoors, and one no pack prints. Equatorial plants need a autumn days to go on late enough to let 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 rot in November. The further to the equator, in a northern hemisphere, the longer the season stretches, and Mediterranean and subtropical growers are able to ripen plants that temperate growers never will.
The practical rule of a seed listing: an « outdoor » line harvest date is stated for the breeder’s home latitude, normally somewhere within southern Europe or the west coast of the United States, and every degree north of it pushes the date back into the weather. A grower north of roughly the fiftieth parallel that is after a true sativa outdoors is shopping for an autoflower or a covered space, and not a better season.
Stretch
The surge of upward growth that follows the switch to flowering. Most tent-bred plants gain half again; sativas routinely double, and some landrace lines triple. The stretch lasts three to four weeks and will not be stopped once it has started, only redirected by training.
In tent terms, a stretch multiplier is a number worth reading before deciding when to switch. A sativa switched at sixty centimetres centimetres inside a standard tent is at the lamp before week four of flower; one flipped at thirty centimetres centimetres has room. Growers coming from indica strains nearly always flip far too late the first time, and the lesson is visible on the ceiling of the tent.
Foxtailing
The habit of certain flowers to push out fresh calyx clusters on top of existing ones, producing spired, irregular buds rather than dense ones. In most tent-bred strains it is a stress response, usually from light that is too close or a room too high, and the standard response is to correct the cause.
In many sativas, especially Thai and certain Haze hybrids, it is genetic and is going to occur under a flawless room. A first-time sativa grower frequently wastes a month chasing a problem that was never there, lowering lights and temperatures and slowing a slow flower even more. The breeder rarely says which type to expect; the lineage usually does.
Landrace
A population of plants shaped over generations to a particular region by local climate and climate together, rather than by deliberate breeding. Thai, Colombian, Congolese and Oaxacan lines are the classic sativa examples. A landrace is a spread, rather than a single plant: inside a pack the heights, finishing times and aromas range far more than any tent-bred line, and this variation is the point of growing one.
The mistake is buying a landrace as a modern hybrid. It brings habits that made sense in an equatorial field, such as height that no tent can contain and a flowering clock tuned to a equatorial daylength the majority of growers cannot offer. « Heirloom » in a listing generally means a landrace that has been reproduced away from its origin over some generations, often with light selection towards indoor conditions; it is closer to usable but still not uniform. A seller listing « landrace » that does not give a collection point and a generation count is using the word loosely, and the pack should be judged accordingly.
Terpinolene (the « sativa smell »)
A terpene found in high amounts in many old sativa lines and accounting for most of the thing people describe as the « sativa » smell: fresh, piney, citrus and faintly floral all at once. It is volatile, lost easily by fast drying, and terpinolene fades more quickly during the cure than the earthier terpenes which dominate most tent stock.
For a seed buyer the name does two jobs. Where a listing names terpinolene among the leading aromas, the line most likely carries real old-sativa genetics whatever the label claims. And when the you wants that smell to still be there by the jar, the cure is going to be slow and cool; a warm drying room turns a terpinolene line into a flower that smells of hay and no trace of what the pack described.
Sativa-dominant (the label)
The marketing category and not a measurable one. The phrase generally indicates that the larger share of a hybrid’s lineage were described as sativa by whoever wrote the description, which sometimes signals nothing more than a certain the buds are longer or the aroma brighter than the that breeder’s other releases.
The experience people connect with the word, lively rather than heavy, is governed far more by terpene chemistry and by cannabinoid balance than by the sativa fraction, and plenty of « sativa-dominant » hybrids deliver a flat sleepy effect while a good number of indica-labelled stock deliver the opposite. For a buyer the percentage is worth something as a rough hint to growth habit, flowering time and stretch; as a guide to effect it is close to worthless without the aroma notes.
Equatorial (the twelve-hour problem)
Describes lines out of regions in which daylength barely varies through the year, which means where the plant never develop a sharp response to shortening days. Such lines often start flowering slowly under a conventional twelve-hour light cycle, since twelve hours is, to them, a mild unremarkable day rather than a signal.
The working response, handed around between sativa growers for decades, is to cut the light further: eleven hours, occasionally ten, particularly in the final weeks. It loses some little yield and buys a more clearer end. A listing which says « equatorial » is warning you about this with one word, and a grower that takes it as mere origin misses the instruction hidden in it.
