Sativa seeds arrive with more vocabulary attached than any other kind of cannabis seed, and most of it says one thing to a botanist, something else to a seed company and something different again to the person trying to make a decision in front of the pack. The failed sativa grow usually traces back to a word that was understood in the wrong one of those senses: a flowering time taken as a fixed number, a “sativa-dominant” label taken as a description of character, a landrace bought like it were a tent-bred hybrid. The entries below were written with the range at https://hazesativaseeds.com open for the concrete examples, because it runs strongly to the long-flowering end of the category and that is where the words carry the most weight most; the definitions themselves apply to any sativa seed from any shop. They are in no particular order, since not one of them makes sense on its own without the others.
Landrace
A population of plants adapted over generations to a particular region by the local climate and climate together, and not by deliberate selection. Colombian, Thai, Malawian and Oaxacan stock are the classic sativa cases. A landrace is variable, not a single plant: inside a pack the heights, flowering times and aromas range far more than a tent-bred line, and that variation is the whole value of growing one.
The mistake is treating a landrace like a modern product. It carries traits that made sense in an open field, including height no tent can hold and a flowering rhythm tuned to a daylength most growers never offer. “Heirloom” in a listing generally means a landrace that has been reproduced away from its origin for some generations, typically with light selection towards tent life; it is nearer to manageable but nonetheless far from uniform. A shop offering “landrace” without a origin region and a generation history is using the word as a flavour, and the pack should be priced with that in mind.
Equatorial
Refers to plants out of latitudes where daylength barely varies through the year, which means that the plant never develop a strong response to shortening days. Such lines often start flowering slowly under a standard twelve-hour schedule, because twelve hours is, for them, an unremarkable day rather than a signal.
The working fix, passed around between sativa growers for decades, is to shorten the light more: eleven hours, occasionally ten, especially during the last weeks. It costs some little yield and buys an earlier clearer end. A listing which uses “equatorial” is warning you this in one word, and a grower who reads it as a note on geography has missed the instruction inside it.
Hermaphroditism in long-flowering lines
The production of pollen-bearing flowers on a female plant, typically towards the end in flower and often in response to stress. Almost every cannabis population has a degree of tendency to do; sativa lines express it more, for a plain reason: sixteen weeks of flower is fourteen weeks of opportunity for a light leak, a heat spike or a missed watering that can set it off, and a plant that has already waited beyond its intended end frequently throws a few late male sacs on its own in a final attempt to set seed.
None of these makes a sativa strain unstable by course; it means the room’s discipline count over longer. Light-tight room, stable conditions and harvesting the moment the plant is ready and not a week later take away most of the risk. A listing that states a breeder screens parents for hermaphrodite tendency is worth more on a long-flowering line than for anything else.
Terpinolene (the “sativa smell”)
A terpene found in large proportion in many old sativa strains and responsible for much of the thing growers describe as a “sativa” smell: fresh, woody, citrus and faintly sweet all at once. It is fragile, driven off easily through hot drying, and it degrades faster in storage than the heavier terpenes that dominate indica-leaning stock.
To a seed buyer the name does two things. When a listing lists terpinolene among the lead aromas, the line most likely carries substantial old-sativa ancestry regardless of what the percentage says. And when the grower are after that smell to survive to the jar, the cure has to be slow and cool; a fast dry turns a terpinolene line to something that tastes of very little and leaves nothing of what the pack promised.
Sativa-dominant
The marketing term and not a measurable one. The phrase usually indicates that more of a hybrid’s lineage were classed as sativa according to whoever drafted the description, which occasionally signals no more than a certain the flowers are airier or the smell sharper than the same breeder’s indica-labelled releases.
The experience people associate with a word, lively rather than sedating, is driven more by terpene profile and the THC content than it is by ancestry, and plenty of “sativa-dominant” releases produce a heavy sleepy result and a good number of the opposite stock deliver exactly the opposite. To a grower the percentage is useful as a loose hint to growth habit, flowering time and stretch; for a guide to how it feels it is close to worthless unless accompanied by the aroma description.
Haze
Originally a particular family of plants bred in coastal California from Mexican, Colombian and South Indian parents, and later preserved and worked in the Netherlands. A true Haze grows tall, fills out sparsely, flowers for twelve sixteen weeks and smells of spice, citrus and a note metallic that no other other line quite reproduces.
In its looser sense “Haze” is whatever hybrid that carries some of that family, which by now is most of the sativa-leaning market. A listing that reads “Haze” and gives no lineage may be mostly percent the old family or a small fraction of it, and the flowering character follows the fraction, not the name. The working question is not “is it a Haze” but “how much, and via which parent”.
Flowering time
The figure of weeks between the onset of flowering and maturity, which is the single most frequently misread number on a sativa pack. For photoperiod seed it is counted 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 give the optimistic end of a spread, because the longer end moves fewer seed.
Sativa lines take anywhere from ten weeks to well over twenty, and the slowest line in the Haze Sativa Seeds range comes in at around 16 weeks from the switch. The catalogue can be sorted by that figure, which is the reasonable first step for a grower with a fixed schedule. A grower who adds four weeks on top of whatever the pack states is rarely caught out.
Foxtailing
The tendency of some flowers to push out new calyx growth on top of old ones, producing towered, open buds instead of round ones. In the majority of tent-bred lines it is a heat symptom, usually from light too close or temperatures too high, and the advice is to fix the room.
In a good number of sativas, above all Southeast Asian and some Haze hybrids, it is built in and will occur in a flawless room. A new sativa grower often wastes a month hunting a problem that is not a problem, lowering lights and temperatures only delaying a long plant even more. The listing seldom says which kind to expect; the parentage usually does.
Latitude
The single number that decides if a sativa can finish outdoors, and one that no pack prints. Equatorial plants need a run of shortening days to go on late enough for the plant finish; at high latitudes the frost arrives before that, and the grower cuts a half-finished plant in late October or else loses it to mould in November. A further to the equator, within a northern hemisphere, the longer the window runs, and Mediterranean or subtropical gardens can ripen lines that northern growers never will.
The usable reading for a seed listing: an “outdoor” line harvest month is given for the breeder’s home latitude, normally somewhere within southern Europe or the west coast of the United States, and every degree further north of it moves the date later into the weather. A grower above about the fiftieth parallel that is after a true sativa in the garden needs to be shopping for an autoflower or else a covered space, not a better summer.