Sativa seeds arrive with more jargon attached than any other category of cannabis seed, and most of it means a certain thing to a botanist, another to a seed company 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 understood in the wrong sense: a flowering time read as a promise, a “sativa-dominant” tag read as a statement of effect, a landrace bought as if it were a modern hybrid. The entries below were written with the range at https://hazesativaseeds.com to hand as reference, because it leans strongly to the classic end of the category and that is where the vocabulary carry the most weight most; the definitions themselves hold to any sativa seed from any shop. They are in no special order, because not one of them makes usable without the rest.
Equatorial
Describes plants out of latitudes in which daylength hardly changes through the year, which means where the plant never develop a sharp reaction to changing days. Such lines frequently start flowering reluctantly under a standard twelve-hour schedule, because twelve hours is, to them, an unremarkable day and not a signal.
The working response, handed down between sativa growers for decades, is to cut the light further: eleven hours, occasionally ten, particularly during the last weeks. It costs some yield yield and gains a earlier decisive end. A listing which uses “equatorial” is warning you about this in one word, and a grower who takes it as a note on origin misses the point hidden in it.
Foxtailing (and when it is not a fault)
The tendency of some flowers to grow new calyx clusters on top of existing ones, giving spired, irregular buds rather than dense ones. In most indica-leaning lines it is a stress symptom, typically caused by light too close or temperatures too high, and the standard response is to fix the room.
In many sativas, above all Southeast Asian and some Haze hybrids, it is built in and will occur under a perfect room. A new sativa grower frequently wastes a month chasing a fault that is not a problem, lowering lights and temperatures only slowing an already long plant further. The breeder rarely says which type you should expect; the parentage generally does.
Hermaphroditism in long-flowering lines
The production of male flowers on a female plant, usually late in flower and often in response to stress. Every cannabis population has some tendency for it; sativa plants show it more, and the reason is a plain one: fourteen weeks of flower is sixteen weeks of exposure for a light leak, a temperature spike or a late watering to trigger it off, and a plant plant has gone beyond its intended end frequently produces a few desperate pollen flowers on its own as a last attempt to set seed.
None of this means a sativa strain unstable as a matter of nature; it means the room’s consistency count over longer. A sealed tents, stable temperatures and harvesting when the plant is ready rather than two week later take away the greater part of the problem. A listing which mentions a breeder screens parents for intersex tendency is worth more on a sativa than on anything other category.
Stretch (the doubling)
The burst of vertical growth that comes after the change to flowering. Indica-leaning plants gain half again; sativas commonly double, and a few landrace lines triple. The stretch lasts two to four weeks and will not be stopped once it begins, merely bent sideways by training.
In tent terms, the stretch figure is the fact to reading before choosing when to switch. A sativa switched at sixty centimetres centimetres in a standard tent is at the lamp before week four of flower; one switched at thirty centimetres centimetres has room. Growers moving from indica strains nearly always flip far too late the first time, and the consequence is visible on the ceiling of the tent.
Terpinolene (the “sativa smell”)
A aromatic compound present in large amounts in many classic sativa strains and responsible for much of the thing growers mean as a “sativa” smell: green, woody, lemon and faintly floral at once. It is volatile, driven off easily by hot drying, and terpinolene degrades faster during the cure than the heavier terpenes which dominate most tent stock.
To a seed buyer the name earns two jobs. Where a listing names terpinolene among the lead aromas, the line most likely has real old-sativa ancestry regardless of what the label claims. And where the grower are after that smell to still be there to the jar, the cure has to be slow and slow; a fast drying room flattens a terpinolene line into a flower that smells of very little and leaves nothing of what the pack promised.
Haze (the family, not the smell)
Originally a specific line of plants bred in coastal California from Colombian, Thai and South Indian landraces, and then kept and refined in the Netherlands. The Haze runs tall, branches openly, flowers for twelve to sixteen weeks and carries a scent of incense, citrus and something metallic that no other other line exactly reproduces.
In its looser sense “Haze” is any cross that carries some of that family, and by now is most of the sativa-leaning catalogue. A listing which reads “Haze” and gives no parents could be eighty percent original old family or one small fraction of it, and the flowering time follows the fraction, not the name. The useful question is never “is it a Haze” but “how much, and via which parent”.
Landrace
A population of plants shaped over generations to a particular place by the local growers and climate together, rather than by deliberate breeding. Thai, Colombian, Malawian and Mexican lines are the sativa cases. A landrace is a spread, not a single plant: within a pack the heights, flowering times and aromas spread widely than any tent-bred line, and this variation is the point of keeping one.
The trap is treating a landrace as a finished hybrid. It carries habits that make sense in an equatorial field, including a frame no tent can hold and a flowering rhythm tuned to a daylength most growers never offer. “Heirloom” in a listing generally refers to a landrace that has been grown out away from its origin over a number of generations, typically with light selection towards indoor conditions; it is nearer to manageable but nonetheless far from a hybrid. A shop offering “landrace” that does not give a collection region and a reproduction history is using the word as a flavour, and the seeds should be judged accordingly.
Latitude (outdoor sativas)
The one figure that decides whether a sativa will finish outdoors, and a number no pack states. Equatorial lines require the run of shortening days to continue late enough for the plant to finish; in northern latitudes the frost arrives first, and the grower harvests a unripe plant in late October or else loses it to mould in November. The closer south, within a northern hemisphere, the later the season runs, and coastal and subtropical gardens can finish lines that temperate gardens never will.
The usable reading of a seed listing: an “outdoor” line harvest month is stated for the breeder’s home latitude, normally somewhere within temperate Europe or the western United States, and every degree north of that moves the finish later into the frost. A grower north of roughly the fiftieth parallel that wants a true sativa outdoors is shopping for an autoflower or else a covered space, not a longer summer.
Flowering time (and what it is counted from)
The figure of weeks between the start of flowering and harvest, and the single most misunderstood number on a sativa pack. With photoperiod seed it is counted from the day the light is cut to twelve hours, not from germination, so a “fourteen-week” sativa started with a eight-week vegetative stage is a five-month plant. Seed companies also give the shorter end of a range, because the other end moves fewer seed.
Sativa lines take anywhere from ten weeks to more than twenty, and the slowest strain in the Haze Sativa Seeds range is at around 16 weeks from the flip. The catalogue can be sorted by that figure, which is the reasonable first pass for a grower with a tight schedule. A grower who allows four weeks to whatever the pack states is rarely disappointed.