Sativa seeds come with more jargon around them than any other category of cannabis seed, and most of it means a certain thing to a botanist, another to a breeder and something different again to the grower standing in front of the pack. The disappointing sativa grow usually traces back to a word that was understood in the wrong sense: a flowering time taken as a promise, a “sativa-dominant” tag read as a description of effect, a landrace chosen as if it were a modern hybrid. The entries below are put together with the range at https://hazesativaseeds.com open as reference, since it runs strongly towards the long-flowering end of the category where the words matter most; the definitions themselves apply to any sativa seed from any seller. They are given in no particular order, because none of them makes usable on its own without the rest.
Terpinolene
A terpene present in large amounts in a lot of classic sativa lines and responsible for much of the thing people mean as the “sativa” smell: fresh, woody, lemon and slightly sweet at once. It is volatile, lost easily through hot drying, and terpinolene fades faster in storage than the earthier terpenes that lead indica-leaning stock.
To a seed buyer the name does two things. Where a listing lists terpinolene among the leading aromas, the strain most likely has real Haze-era ancestry whatever the label says. And where the you are after that profile to still be there to the jar, the cure has to be cool and slow; a warm drying room flattens a terpinolene sativa to a flower that tastes of very little and nothing of what the pack described.
Landrace
A population of plants shaped through generations to one place by local growers and growers together, rather than by modern breeding. Thai, Thai, Congolese and Mexican stock are the sativa cases. A landrace is variable, rather than a one plant: within a pack the flowering times, flowering times and smells spread far more than any tent-bred line, and that variation is the whole value of keeping one.
The trap is buying a landrace like a modern hybrid. It brings habits that made sense in an equatorial field, including height no tent can hold and a flowering rhythm tuned to a daylength the majority of growers never provide. “Heirloom” in a listing generally means a landrace that has been grown out somewhere for some generations, typically with light selection towards indoor conditions; it is closer to manageable but still far from a hybrid. A shop listing “landrace” without an origin point and a reproduction count is applying the word loosely, and the pack should be priced accordingly.
Haze
Originally a particular line of plants put together in coastal California from Mexican, Thai and South Indian parents, and later kept and refined in the Netherlands. The Haze grows tall, fills out sparsely, flowers for twelve sixteen weeks and smells of spice, pine and something sharp that no other other line exactly reproduces.
In its looser sense “Haze” is whatever cross which contains some of that family, and by now is most of the sativa-leaning market. A listing which says “Haze” and gives no parents could be eighty percent the classic family or one small fraction of it, and the flowering time tracks the share, not the name. The working question is not “is it a Haze” but “how much, and through which parent”.
Intersex tendency
The appearance of pollen-bearing flowers on a female plant, typically towards the end in flower and often under stress. Almost every cannabis population carries some tendency for do; sativa lines express it more often, for a simple reason: fourteen weeks of flower is fourteen weeks of opportunity for a light leak, a temperature spike or a missed watering to trigger it going, and an plant plant has already waited beyond its intended end frequently produces a few late pollen flowers on its own as a final attempt to set seed.
Not one of this makes a sativa line weak by nature; it makes the grower’s discipline matter over a longer stretch. A sealed room, steady temperatures and cutting the moment the plant is done rather than two weeks after take away the greater part of the risk. A listing that states the breeder screens parents for hermaphrodite traits is saying something more on a sativa than on anything else.
Foxtailing
The tendency of some flowers to grow fresh calyx growth on top of old ones, giving spired, irregular buds rather than round ones. In the majority of indica-leaning strains it is a heat response, usually from light too close or temperatures too high, and the standard response is to fix the room.
In a good number of sativas, above all Thai and certain Haze hybrids, it is built in and is going to occur in a flawless room. A first-time sativa grower frequently wastes a month hunting a fault that was never a problem, dropping lights and temperatures only slowing an already long flower even more. The listing rarely says which type you should expect; the lineage usually tells you.
Sativa-dominant (the label)
The marketing term and not a measurable one. The phrase generally means that more of a hybrid’s lineage are described as sativa by whoever wrote the listing, and sometimes signals no more than a certain the buds are airier or the aroma brighter than the that breeder’s indica-labelled lines.
The effect people associate with a word, lively rather than sedating, is governed more by terpene profile and the cannabinoid balance than it is by ancestry, and plenty of “sativa-dominant” hybrids deliver a heavy sleepy effect while plenty of indica-labelled lines deliver exactly the reverse. To a buyer the percentage is worth something as a loose guide to growth habit, flowering time and stretch; for a guide to effect it is next to worthless unless accompanied by the terpene notes.
Equatorial
Describes plants out of latitudes in which daylength barely varies through the year, which means that the plant does not develop a sharp response to changing days. Such lines often flower reluctantly under a standard twelve-hour light cycle, because twelve hours is, to them, an ordinary day and not a signal.
The working response, handed down between sativa growers for decades, is to shorten the light further: eleven hours, sometimes ten, particularly in the final weeks. It costs some little yield and gains an more clearer finish. A listing which uses “equatorial” is telling you about this in one word, and a grower that takes it as a note on origin misses the point inside it.
Flowering time
The number of weeks from the start of flowering and maturity, and the one most misread number 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 after an ordinary vegetative period is a twenty-two-week plant. Seed companies additionally quote the shorter end of a range, because the longer end sells less seed.
Sativa plants run everywhere from ten weeks to more than twenty, and the slowest strain in the Haze Sativa Seeds range comes in at about 16 weeks after the switch. The catalogue can be sorted by this figure, which is a reasonable first pass for a grower with a fixed schedule. A grower who allows four weeks to whatever the pack says is rarely disappointed.
Stretch
The surge of upward growth that comes after the switch to flowering. Indica-leaning plants add half again; sativas routinely double, and a few landrace types go further. The stretch continues three to five weeks and cannot be stopped once it begins, merely bent sideways by training.
In practical terms, a stretch multiplier is the number to read before choosing when to flip. A sativa flipped at sixty centimetres inside a standard tent is touching the lamp before week four of flower; one flipped at thirty centimetres centimetres has room. People coming from indica stock nearly always flip far too late the first time, and the lesson is written on the ceiling of the tent.
