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 breeder and a third to the grower standing in front of the pack. A disappointing sativa grow nearly always goes back to a word that was read in the wrong one of those senses: a flowering time read as a fixed number, a “sativa-dominant” label taken as a statement of character, a landrace chosen as if it were a modern hybrid. The entries below were written with the range at https://hazesativaseeds.com open for reference, because it runs heavily towards the classic end of the spectrum and that is where the words matter most; the definitions though apply to any sativa seed from any seller. They are given in no particular order, because none of them is sense without the rest.
Flowering time (and what it is counted from)
The figure of weeks between the onset of flowering and harvest, and the single most misunderstood figure on a sativa pack. For photoperiod seed it is counted from the day the light drops to twelve hours, rather than from sowing, so a “fourteen-week” sativa grown with an ordinary vegetative period is a twenty-two-week plant. Seed companies also quote the optimistic end of a spread, because the longer end moves less seed.
Sativa plants run anywhere from ten weeks to well over twenty, and the longest line in the Haze Sativa Seeds range is at around 16 weeks from the switch. The catalogue can be filtered by that figure, which is a reasonable first step for a grower with a tight timetable. A grower who allows four weeks to the figure the pack says is seldom caught out.
Sativa-dominant
The marketing category rather than a botanical one. It generally means that more of a hybrid’s lineage were classed as sativa by the breeder who wrote the description, and sometimes signals nothing more than a certain the flowers are airier or the smell brighter than the same breeder’s indica-labelled lines.
The effect people connect with a word, lively rather than heavy, is driven more by terpene profile and the cannabinoid content than it is by the sativa fraction, and a good number of “sativa-dominant” releases deliver a heavy couch result and a good number of indica-labelled stock do exactly the reverse. To a grower the label is worth something as a rough guide to growth habit, flowering time and stretch; as a guide to how it feels it is next to useless unless accompanied by the terpene description.
Intersex tendency
The appearance of male flowers on a female plant, usually towards the end in flower and frequently under stress. Every cannabis population carries a degree of tendency to do; sativa plants show it more often, and the reason is one plain reason: sixteen weeks of flower is fourteen weeks of exposure for a timer leak, a temperature spike or a late watering that can trigger it off, and a old plant has gone past its natural finish often throws a few late male sacs on its own as a last attempt to make seed.
None of this means a sativa strain unstable by nature; it makes the room’s discipline count for longer. A sealed room, stable temperatures and harvesting the moment the plant is done and not a weeks later take away most of the risk. A listing which mentions a breeder screens parents for hermaphrodite traits is worth worth hearing for a sativa than on any else.
Haze (the family, not the smell)
In its first sense a specific line of plants put together in 1970s California from Colombian, Thai and South Indian parents, and later kept and refined in the Netherlands. A true Haze runs tall, branches sparsely, flowers for twelve to to sixteen weeks and carries a scent of incense, citrus and something metallic that no line quite has.
In its second sense “Haze” is any hybrid which carries some of that family, and by now is most of the sativa-leaning market. A listing that reads “Haze” without lineage could be mostly percent original classic family or a sixteenth of it, and the flowering time follows the fraction, not the name. The useful question is not “is it a Haze” but “how much, and through which parent”.
Foxtailing (and when it is not a fault)
The tendency of certain flowers to push out new bud clusters on top of existing ones, producing spired, irregular buds instead of round ones. In most indica-leaning lines it is a heat symptom, typically caused by light too close or temperatures that is too high, and the advice is to fix the room.
In a good number of sativas, above all Southeast Asian and certain Haze hybrids, it is genetic and is going to occur in a flawless room. A new sativa grower often spends a month chasing a fault that is not a problem, dropping lights and temperatures only delaying an already slow plant even more. The listing rarely warns which type to expect; the parentage usually tells you.
Landrace
A population of plants adapted over centuries to a particular region by local climate and growers alike, and not by deliberate selection. Thai, Thai, Congolese and Mexican stock are the sativa examples. A landrace is variable, not a single plant: inside a pack the flowering times, finishing times and smells range far more than in a tent-bred line, and that spread is the point of growing one.
The trap is treating a landrace like a finished hybrid. It carries habits that made sense in an open field, such as a frame no tent can hold and a flowering rhythm tuned to an equatorial daylength the majority of growers never provide. “Heirloom” on a listing generally refers to a landrace that has been grown out away from its origin over a number of generations, typically with light selection towards indoor life; it is nearer to manageable but nonetheless far from a hybrid. A seller listing “landrace” that does not give an origin point and a generation history is applying the word as a flavour, and the seeds should be priced with that in mind.
Stretch
The surge of vertical growth that follows the switch to flowering. Indica-leaning plants gain half their height again; sativas routinely double, and a few equatorial lines triple. The stretch continues two to four weeks and will not be stopped after it begins, merely bent sideways by training.
In practical terms, the stretch multiplier is the fact worth read before deciding when to switch. A sativa flipped at sixty centimetres in a two-metre tent is at the lamp before week four of flower; one switched at thirty centimetres centimetres has room. Growers moving over from indica strains nearly always flip far too late the first time, and the consequence is written on the ceiling of the tent.
Terpinolene
A aromatic compound found in high proportion in a lot of old sativa lines and accounting for most of the thing people mean as the “sativa” smell: green, woody, lemon and slightly sweet at once. It is volatile, driven off quickly by hot drying, and it fades faster in the cure than the heavier terpenes which dominate most tent stock.
For a seed buyer the name does two jobs. Where a listing names terpinolene as the lead terpene, the line probably has substantial Haze-era ancestry regardless of what the percentage says. And where the you wants that profile to still be there to the jar, the drying has to be slow and slow; a fast dry turns a terpinolene sativa to something that tastes of hay and no trace of what the pack described.
Latitude
The one number that decides whether a sativa will ripen outdoors, and one no pack prints. Equatorial plants need the autumn days to go on long enough to let the plant ripen; at high latitudes the frost arrives first, and the grower cuts a half-finished plant in the end of October or loses it rot in November. The closer south, in the northern hemisphere, the longer the window stretches, and Mediterranean or subtropical growers can finish lines that temperate growers cannot.
The usable rule of a seed listing: an “outdoor” line harvest date is stated for the breeder’s own latitude, normally somewhere within southern Europe or the west coast of the United States, and each degree north of it moves the date back towards the frost. A grower above about the fiftieth parallel who wants a true sativa outdoors needs to be shopping for an autoflower or else a greenhouse, and not a better season.
Equatorial
Refers to plants from latitudes in which daylength hardly changes through the year, and where the plant never develop a strong response to shortening days. Such plants often flower reluctantly at a conventional twelve-hour light cycle, since twelve hours is, for them, a mild unremarkable day and not a signal.
The practical fix, handed down among sativa growers over decades, is to shorten the light further: eleven hours, occasionally ten, particularly in the last weeks. It loses some yield yield and gains a more clearer end. A listing which uses “equatorial” is telling you about this in one word, and a grower that reads it as a note on geography has missed the point inside it.
