Sativa seeds arrive with more jargon attached than any other category of cannabis seed, and most of it says a certain thing to a botanist, another to a breeder and a third to the person standing in front of the pack. The failed sativa grow usually goes back to a word that was read in the wrong sense: a flowering time read as a promise, a “sativa-dominant” label read as a description of character, a landrace chosen like it were a tent-bred hybrid. The entries below are written with the range at https://hazesativaseeds.com open as the concrete examples, since it leans strongly to the long-flowering end of the spectrum where the words matter most; the definitions themselves apply to any sativa seed from any shop. They are given in no particular order, since none of them makes usable on its own without the rest.
Landrace
A population of plants adapted over centuries to one place by local growers and climate together, and not by modern selection. Thai, Thai, Malawian and Mexican lines are the classic sativa cases. A landrace is a spread, rather than a one plant: inside a pack the flowering times, finishing 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 as a finished product. It brings traits that make sense in an equatorial field, including a frame no tent can hold and a flowering rhythm set to an daylength most growers never provide. “Heirloom” in a listing generally means a landrace that has been grown out somewhere over some generations, typically with a degree of selection for tent life; it is nearer to manageable but still not a hybrid. A shop offering “landrace” that does not give a origin region and a reproduction count is using the word as a flavour, and the seeds should be priced accordingly.
Stretch
The burst of vertical growth which follows the change to flowering. Most tent-bred plants gain around half again; sativas routinely double, and a few equatorial lines triple. The stretch lasts two to five weeks and cannot be stopped once it begins, only bent sideways by training.
In tent terms, a stretch figure is the fact worth reading ahead of choosing when to switch. A sativa flipped at sixty centimetres in a two-metre tent is at the lamp by week four of flower; one flipped at thirty centimetres centimetres has room. People moving over from indica strains nearly always flip far too late the first time, and the consequence is written on the ceiling of the tent.
Haze (the family, not the smell)
In its first sense a particular family of plants put together in coastal California from Colombian, Colombian and Thai parents, and then preserved and refined in the Netherlands. A true Haze grows tall, branches openly, takes for twelve to sixteen weeks and carries a scent of incense, pine and a note sharp that no other line quite reproduces.
In its second sense “Haze” is whatever cross which contains a share of that family, and by now is a great many of the sativa-leaning catalogue. A listing which reads “Haze” without lineage could be eighty percent original old family or one small fraction of it, and the flowering character tracks the share, not the name. The working question is not “is it a Haze” but “how much, and via which parent”.
Foxtailing (and when it is not a fault)
The habit of some flowers to grow new calyx growth on top of existing ones, producing towered, open buds instead of round ones. In most tent-bred strains it is a stress response, typically caused by light too close or a room too high, and the advice is to fix the room.
In many sativas, especially Southeast Asian and some Haze lines, it is built in and will happen in a flawless room. A first-time sativa grower often spends weeks chasing a problem that was never there, lowering lights and temperatures only delaying an already long plant even more. The breeder seldom says which kind to expect; the parentage generally tells you.
Flowering time
The number of weeks from the start of flowering and harvest, which is the one most misread figure on a sativa pack. With photoperiod seed it is measured from the day the light drops to twelve hours, not from germination, so a “fourteen-week” sativa started with a ordinary vegetative stage is a twenty-two-week plant. Breeders additionally give the shorter end of a spread, since the other end moves less seed.
Long-flowering plants run anywhere from ten weeks to more than twenty, and the slowest strain in the Haze Sativa Seeds range is at around 16 weeks after the switch. The catalogue can be filtered by that figure, which is a reasonable first pass if you have a grower on a fixed schedule. A grower who allows four weeks on top of whatever the pack states is rarely disappointed.
Equatorial (the twelve-hour problem)
Describes plants out of latitudes where daylength hardly varies across the year, and where the plant never evolved a strong response to shortening days. Such plants frequently start flowering reluctantly under a standard twelve-hour light cycle, since twelve hours is, to them, a mild ordinary day and not a signal.
The practical fix, handed around among sativa growers over decades, is to shorten the light more: eleven hours, occasionally ten, especially during the final weeks. It loses a yield yield and gains an earlier clearer finish. A listing that uses “equatorial” is telling you about this with one word, and a grower that takes it as a note on geography has missed the point inside it.
Hermaphroditism in long-flowering lines
The appearance of pollen-bearing flowers on a female plant, usually towards the end in flower and often in response to stress. Almost every cannabis population carries a degree of tendency for it; long-flowering plants show it more often, for a plain one: sixteen weeks of flower is sixteen weeks of exposure for a timer leak, a temperature spike or a late watering to set it going, and a plant plant has waited past its natural end often throws a few desperate male flowers on its own in a final effort to set seed.
Not one of this makes a sativa line unstable as a matter of course; it makes the room’s consistency count over longer. Light-tight tents, stable conditions and cutting the moment the plant is ready and not a weeks after remove most of the problem. A listing that mentions the breeder tests parents for intersex traits is saying something more for a sativa than on anything other category.
Terpinolene
A aromatic compound found in large amounts in a lot of classic sativa strains and responsible for most of the thing people mean as a “sativa” aroma: green, piney, citrus and slightly sweet at once. It is fragile, driven off easily by fast drying, and it fades more quickly during the cure than the earthier terpenes which dominate indica-leaning lines.
To a seed buyer the name does two jobs. Where a listing names terpinolene among the lead aromas, the strain most likely carries real Haze-era genetics whatever the percentage says. And where the you wants that smell to still be there to the jar, the cure is going to be cool and slow; a fast dry turns a terpinolene line into a flower that tastes of very little and leaves nothing of what the pack promised.
Latitude
The single figure that decides if a sativa will finish outdoors, and a number that no pack states. Equatorial lines require the autumn days to continue long enough to let the plant to ripen; at high latitudes the frost comes first, and the grower cuts a unripe plant in the end of October or watches it rot in November. A further south, within a northern hemisphere, the longer the window runs, and Mediterranean and subtropical growers can finish lines that northern growers cannot.
The practical reading for a seed listing: an “outdoor” line harvest date is stated for the breeder’s own latitude, normally a point in temperate Europe or the west coast of the United States, and every degree north of it moves the date back into the frost. A grower north of about the fiftieth parallel who is after a long-flowering sativa outdoors needs to be shopping for a sativa autoflower or else a greenhouse, and not a longer summer.