Sativa seeds arrive with more jargon around them than any other category 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 listing. A disappointing sativa grow nearly always goes back to a word that was understood in the wrong one of those senses: a flowering time taken as a promise, a “sativa-dominant” label read as a description of character, a landrace bought like it were a modern hybrid. The entries below are put together with the range at https://hazesativaseeds.com to hand as the concrete examples, because it leans strongly to the long-flowering end of the spectrum where the words carry the most weight most; the definitions though hold to any sativa seed from any seller. They are in no particular order, since not one of them is usable on its own without the rest.

Stretch

The surge of upward growth which follows the switch to flowering. Most tent-bred plants add half again; sativas routinely double, and a few equatorial types 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 fact to read before choosing when to flip. A sativa flipped 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. Growers coming from indica stock almost always switch too late the first time, and the lesson is visible on the ceiling of the tent.

Hermaphroditism in long-flowering lines

The appearance of male flowers on a female plant, usually late in flower and often in response to stress. Every cannabis line has some tendency for it; sativa lines show it more, and the reason is one plain one: sixteen weeks of flower is fourteen weeks of exposure for a light leak, a temperature spike or a missed watering to set it going, and a plant plant has already waited past its intended finish often throws a few late male sacs on its own in a final attempt to make seed.

Not one of this makes a sativa line unstable as a matter of course; it makes the room’s discipline matter for longer. Light-tight room, stable temperatures and harvesting the moment the plant is ready rather than a weeks after remove most of the problem. A listing that mentions the breeder tests parents for hermaphrodite traits is worth more for a sativa than for anything other category.

Foxtailing

The tendency of certain flowers to push out new calyx clusters on top of existing ones, producing spired, irregular buds rather than round ones. In the majority of indica-leaning lines it is a stress response, typically from light that is too close or a room too high, and the standard response is to fix the cause.

In a good number of sativas, especially Southeast Asian and certain Haze lines, it is built in and will happen in a flawless room. A new sativa grower often wastes weeks chasing a fault that is a problem, lowering lights and temperatures only delaying an already long flower further. The breeder seldom says which type you should expect; the lineage generally does.

Latitude

The single number that decides if a sativa will ripen outdoors, and one no pack states. Equatorial lines need the autumn days to go on late enough for the plant ripen; at high latitudes the frost arrives first, and the grower cuts an half-finished plant in late October or else watches it rot in November. A further to the equator, in a northern hemisphere, the later the window stretches, and Mediterranean and subtropical growers are able to ripen lines that northern gardens cannot.

The practical rule of a seed listing: an “outdoor” sativa harvest month is stated for the breeder’s own latitude, normally a point within southern Europe or the west coast of the United States, and each degree further north of that pushes the date later into the weather. A grower north of about the fiftieth parallel who is after a true sativa in the garden needs to be looking for a sativa autoflower or else a covered space, not a better season.

Terpinolene (the “sativa smell”)

A aromatic compound found in large proportion in a lot of old sativa lines and responsible for most of the thing growers describe as the “sativa” aroma: green, piney, citrus and faintly floral all at once. It is volatile, driven off easily by fast drying, and terpinolene degrades faster during the cure than the earthier terpenes that dominate most tent lines.

For a seed buyer the word earns two jobs. When a listing lists terpinolene among the leading terpene, the line probably carries substantial Haze-era genetics whatever the label claims. And where the grower are after that smell to survive by the jar, the cure has to be slow and cool; a warm dry turns a terpinolene sativa into something that tastes of very little and nothing of what the pack promised.

Flowering time

The figure of weeks between the onset of flowering and harvest, which is the single most misread number on a sativa pack. For photoperiod seed it is measured from the day the light is cut to twelve hours, rather than from germination, so a “fourteen-week” sativa grown with an ordinary vegetative stage is a twenty-two-week plant. Seed companies additionally give the shorter end of a spread, since the longer end sells less seed.

Long-flowering plants take everywhere from ten weeks to more than twenty, and the longest strain in the Haze Sativa Seeds range is at about 16 weeks after the flip. The catalogue can be filtered by that figure, which is a reasonable first step if you have a room on a tight timetable. A grower who adds four weeks to the figure the pack states is seldom disappointed.

Landrace

A population of plants adapted over generations to a particular place by local climate and growers together, and not by deliberate selection. Thai, Thai, Malawian and Oaxacan lines are the sativa cases. A landrace is variable, not a single plant: inside a pack the flowering times, finishing times and aromas spread far more than in a tent-bred line, and this spread is the whole value of growing one.

The mistake is buying a landrace like a finished hybrid. It carries traits that made sense in an open field, such as a frame that no tent can hold and a flowering clock set to an daylength the majority of growers never provide. “Heirloom” on a listing usually means a landrace that has been grown out away from its origin for some generations, often with a degree of selection for tent conditions; it is nearer to usable but nonetheless far from uniform. A seller listing “landrace” that does not give an collection point and a generation count is using the word loosely, and the pack should be judged with that in mind.

Haze (the family, not the smell)

In its first sense a specific line of plants bred in 1970s California from Colombian, Thai and Thai landraces, and then preserved and worked in the Netherlands. A true Haze grows tall, branches sparsely, takes for twelve sixteen weeks and smells of spice, pine and a note sharp that no line exactly reproduces.

In its second sense “Haze” is any cross that carries some of that family, which today is a great many of the sativa-leaning market. A listing which reads “Haze” and gives no lineage could be mostly percent the old family or a sixteenth of it, and the grow character tracks the share, not the name. The useful question is not “is it a Haze” but “how much, and through which parent”.

Equatorial

Refers to lines from latitudes where daylength barely changes through the year, which means where the plant does not evolved a strong reaction to changing days. Such lines frequently flower reluctantly under a standard twelve-hour light cycle, because twelve hours is, to them, a mild unremarkable day rather than a signal.

The practical response, handed down among sativa growers over decades, is to shorten the light more: eleven hours, sometimes ten, especially in the last weeks. It costs a little yield and gains a earlier decisive finish. A listing that uses “equatorial” is warning you about this in one word, and a grower who takes it as a note on geography misses the instruction inside it.