The Sativa Vocabulary: Ten Words to Learn Before You Buy
Sativa seeds come with more jargon around them than any other category of cannabis seed, and a good deal of it means a certain thing to a botanist, something else to a seed company and something different again to the person standing in front of the pack. The failed sativa grow usually goes back to a word that was understood in the wrong sense: a flowering time read as a promise, a "sativa-dominant" label taken as a description of effect, a landrace bought like it were a tent-bred hybrid. The entries below are put together with the range at https://hazesativaseeds.com to hand for the concrete examples, because it runs heavily towards the classic end of the category and that is where the words matter most; the definitions though apply to any sativa seed from any shop. They are given in no special order, since none of them is usable without the others.
Latitude (outdoor sativas)
The one number that decides whether a sativa will ripen outdoors, and a number that no pack states. Equatorial plants need the autumn days to continue long enough for the plant ripen; in northern latitudes the frost comes first, and the grower harvests a unripe plant in the end of October or else watches it to mould in November. The closer south, in a northern hemisphere, the longer the window stretches, and Mediterranean and low-latitude gardens can ripen lines that northern growers never will.
The usable reading of a seed pack: an "outdoor" sativa harvest month is given for the breeder's own latitude, usually somewhere within temperate Europe or the western United States, and each step north of that moves the date back towards the frost. A grower north of about the fiftieth parallel who is after a long-flowering sativa in the garden needs to be shopping for an autoflower or a covered space, and not a better summer.
Foxtailing (and when it is not a fault)
The tendency of certain flowers to grow new bud clusters on top of existing ones, giving spired, irregular buds rather than dense ones. In most indica-leaning lines it is a stress response, typically from light too close or temperatures too high, and the standard response is to correct the room.
In many sativas, especially Southeast Asian and certain Haze lines, it is genetic and will occur in a perfect room. A first-time sativa grower often wastes a month hunting a problem that was never not a problem, lowering lights and temperatures and slowing an already long plant even more. The listing rarely warns which type you should expect; the lineage usually does.
Sativa-dominant
The catalogue term rather than a botanical one. The phrase usually indicates that the larger share of a hybrid's parents were classed as sativa according to whoever wrote the listing, which sometimes signals no more than a certain the flowers are airier or the aroma sharper than the that breeder's indica-labelled releases.
The experience people associate with a word, lively instead of heavy, is driven more by terpene profile and by THC balance than it is by ancestry, and a good number of "sativa-dominant" releases produce a flat sleepy result while plenty of the opposite stock do exactly the opposite. For a grower the percentage is worth something for a loose guide to growth habit, flowering time and stretch; as a guide to effect it is close to useless without the aroma description.
Haze (the family, not the smell)
In its first sense a specific family of plants bred in 1970s California from Mexican, Colombian and Thai parents, and later kept and refined in the Netherlands. The Haze runs tall, fills out sparsely, takes for twelve to sixteen weeks and carries a scent of spice, citrus and a note metallic that no line exactly reproduces.
In its looser sense "Haze" is whatever hybrid which carries a share of that family, which by now is a great many of the sativa-leaning market. A listing that says "Haze" without lineage could be mostly percent original old 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".
Hermaphroditism in long-flowering lines
The production of male flowers on a female plant, typically late in flower and often in response to stress. Every cannabis line carries some capacity to it; sativa lines express it more, for one simple one: sixteen weeks of flower is sixteen weeks of exposure for a timer leak, a temperature spike or a late watering that can trigger it going, and an old that has gone past its natural end frequently throws a few late male sacs on its own in a last attempt to make seed.
Not one of this means a sativa strain weak by course; it makes the room's discipline count over a longer stretch. Light-tight room, steady temperatures and cutting when the plant is done rather than a weeks after remove the greater part of the risk. A listing that mentions a breeder screens parents for intersex traits is worth more on a sativa than for anything other category.
Landrace
A population of plants shaped over generations to a particular region by the local growers and climate alike, rather than by modern selection. Thai, Thai, Malawian and Mexican stock are the sativa examples. A landrace is variable, not a one plant: inside a pack the heights, flowering times and aromas spread far more than in any tent-bred line, and that variation is the whole value of keeping one.
The mistake is buying a landrace like a finished hybrid. It carries habits that made sense in an equatorial field, including a frame that no tent can hold and a flowering rhythm tuned to a daylength most growers cannot offer. "Heirloom" in a listing usually refers to a landrace that has been grown out somewhere over some generations, typically with light selection towards indoor conditions; it is nearer to manageable but nonetheless far from uniform. A shop listing "landrace" that does not give an origin point and a generation history is using the word loosely, and the pack should be judged with that in mind.
Terpinolene (the "sativa smell")
A aromatic compound present in large amounts in a lot of classic sativa strains and accounting for much of what growers mean as a "sativa" smell: green, piney, lemon and slightly sweet at once. It is fragile, driven off easily by fast drying, and it fades more quickly in storage than the heavier terpenes that lead most tent lines.
For a seed buyer the word earns two things. When a listing lists terpinolene among the lead aromas, the line probably has substantial old-sativa ancestry regardless of what the percentage says. And when the grower wants that profile to still be there by the jar, the drying has to be cool and slow; a warm dry flattens a terpinolene sativa into a flower that tastes of very little and leaves nothing of what the pack promised.
Equatorial
Describes lines out of regions in which daylength barely changes through the year, which means that the plant does not develop a sharp response to changing days. Such lines often start flowering slowly at a standard twelve-hour schedule, because twelve hours is, to them, an unremarkable day rather than a signal.
The practical fix, handed around between sativa growers for decades, is to cut the light further: eleven hours, sometimes ten, particularly during the final weeks. It costs a yield yield and gains a more decisive finish. A listing that says "equatorial" is warning you about this in one word, and a grower who takes it as a note on geography misses the instruction hidden in it.
Stretch (the doubling)
The surge of upward growth that comes after the change to flowering. Most tent-bred plants gain half again; sativas routinely double, and some landrace lines go further. The stretch continues two to four weeks and cannot be stopped once it begins, merely bent sideways by training.
In tent terms, a stretch multiplier is the fact worth reading ahead of choosing when to flip. A sativa switched at sixty centimetres centimetres in a two-metre tent is touching the lamp before week four of flower; one switched at thirty centimetres centimetres has room. People coming from indica strains almost always flip too late the first time, and the consequence is written on the ceiling of the tent.