Sativa seeds arrive with more jargon attached than any other kind of cannabis seed, and most of it says one 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 goes back to a word that was read in the wrong sense: a flowering time read as a fixed number, a “sativa-dominant” tag taken as a statement of effect, a landrace chosen as if it were a modern hybrid. The entries below were written with the range at https://hazesativaseeds.com open as the concrete examples, since it runs heavily towards the classic end of the spectrum and that is where the vocabulary matter most; the definitions themselves hold to any sativa seed from any seller. They are given in no special order, because none of them is sense without the rest.

Landrace

A population of plants shaped over centuries to one place by the local climate and climate alike, and not by modern selection. Thai, Colombian, Congolese and Mexican stock are the classic sativa examples. A landrace is a spread, not a one plant: inside a pack the flowering times, finishing times and smells range widely than in any tent-bred line, and that variation is the point of keeping one.

The trap is treating a landrace as a modern product. It carries traits that make sense in an equatorial field, including height no tent can hold and a flowering clock tuned to an equatorial daylength the majority of growers never offer. “Heirloom” in a listing usually refers to a landrace that has been grown out away from its origin over a number of generations, often with light selection towards tent life; it is nearer to usable but still far from uniform. A shop offering “landrace” without an origin point and a reproduction history is applying the word loosely, and the pack should be priced accordingly.

Sativa-dominant (the label)

A catalogue term rather than a botanical one. It usually indicates that the larger share of a hybrid’s lineage are classed as sativa according to whoever wrote the description, and sometimes means nothing more than that the flowers are longer or the aroma brighter than the same 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 the sativa fraction, and plenty of “sativa-dominant” hybrids produce a heavy couch effect and plenty of indica-labelled stock deliver exactly the opposite. To a grower the label is useful for a loose hint to growth habit, flowering time and stretch; as a guide to how it feels it is close to worthless unless accompanied by the aroma notes.

Haze

Originally a specific family of plants put together in coastal California from Mexican, Thai and Thai parents, and later kept and worked in the Netherlands. The Haze runs tall, branches sparsely, flowers for twelve sixteen weeks and smells of spice, pine and something sharp that no line exactly has.

In its looser sense “Haze” is whatever hybrid that contains some of that family, which by now is a great many of the sativa-leaning catalogue. A listing that says “Haze” without parents may 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 never “is it a Haze” but “how much, and via which parent”.

Latitude

The one number that determines whether a sativa can ripen outdoors, and one no pack prints. Long-flowering plants require the autumn days to go on long enough for the plant finish; at high latitudes the frost arrives before that, and the grower harvests a unripe plant in late October or loses it to mould in November. The further to the equator, within the northern hemisphere, the later the season stretches, and coastal and low-latitude growers are able to ripen lines that northern growers cannot.

The practical reading for a seed listing: an “outdoor” sativa harvest month is stated for the breeder’s home latitude, normally somewhere within southern Europe or the western United States, and each degree north of it moves the finish back towards the weather. A grower north of about the fiftieth parallel that is after a true sativa outdoors needs to be looking for a sativa autoflower or else a covered space, and not a better summer.

Equatorial

Describes plants out of latitudes where daylength barely varies through the year, and that the plant does not develop a sharp reaction to changing days. These lines often flower slowly under a standard twelve-hour schedule, because twelve hours is, for them, a mild unremarkable day and not a signal.

The practical fix, handed around among sativa growers over decades, is to shorten the light further: eleven hours, occasionally ten, particularly during the last weeks. It costs some little yield and buys an earlier decisive finish. A listing that uses “equatorial” is telling you about this in one word, and a grower who reads it as mere origin misses the instruction hidden in it.

Intersex tendency

The production of pollen-bearing flowers on a female plant, typically towards the end in flower and often under stress. Almost every cannabis population has a degree of capacity for do; long-flowering plants show it more often, and the reason is a simple reason: fourteen weeks of flower is fourteen weeks of exposure for a timer leak, a temperature spike or a missed watering to trigger it going, and a old plant has already gone beyond its intended finish often throws a few late pollen sacs on its own in a last effort to make seed.

None of these makes a sativa strain unstable by nature; it means the room’s discipline matter over a longer stretch. Light-tight tents, steady conditions and cutting the moment the plant is ready rather than a week later take away the greater part of the risk. A listing that states the breeder screens parents for hermaphrodite tendency is worth more on a long-flowering line than for anything other category.

Flowering time

The figure of weeks between the onset of flowering and harvest, and the single most frequently misunderstood number on a sativa pack. For photoperiod seed it is counted from the day the light is cut to twelve hours, rather than from sowing, so a “fourteen-week” sativa started after an eight-week vegetative period is a five-month plant. Seed companies additionally quote the shorter end of a spread, because the other end sells fewer seed.

Sativa lines run everywhere from ten weeks to well over twenty, and the slowest strain in the Haze Sativa Seeds range comes in at around 16 weeks from the flip. The catalogue can be filtered by that number, which is a reasonable first step for a grower with a tight timetable. A grower who adds four weeks on top of whatever the pack says is rarely caught out.

Stretch (the doubling)

The surge of upward growth which follows the switch to flowering. Indica-leaning plants gain around half again; sativas commonly double, and some equatorial lines triple. The stretch lasts two to five weeks and will not be halted once it begins, only redirected by training.

In tent terms, a stretch multiplier is a number worth read before deciding when to switch. A sativa flipped at sixty centimetres inside a standard tent is at the lamp by week four of flower; one flipped at thirty centimetres centimetres has room. People coming from indica strains nearly always flip too late the first time, and the lesson is visible on the ceiling of the tent.

Terpinolene

A terpene found in high amounts in many classic sativa strains and responsible for much of the thing people describe as the “sativa” aroma: green, piney, lemon and slightly sweet all at once. It is fragile, driven off quickly through hot drying, and terpinolene degrades faster in storage than the earthier terpenes that lead most tent lines.

For a seed buyer the word does two jobs. When a listing lists terpinolene as the leading aromas, the strain probably has real Haze-era genetics regardless of what the label claims. And when the grower wants that profile to still be there to the jar, the cure has to be slow and slow; a fast dry flattens a terpinolene sativa into something that smells of very little and leaves no trace of what the pack promised.