Sativa seeds come with more jargon attached than any other category of cannabis seed, and a good deal of it says a certain thing to a botanist, something else to a breeder and something different again to the person trying to make a decision in front of the pack. The disappointing sativa grow nearly always traces back to a word that was read in the wrong one of those senses: a flowering time taken as a promise, a «sativa-dominant» tag read as a description of character, a landrace bought 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 runs heavily towards the long-flowering end of the category and that is where the vocabulary matter most; the meanings though hold to any sativa seed from any shop. They are given in no special order, because not one of them is sense without the others.
Landrace versus heirloom
A population of plants shaped through generations to one region by the local growers and climate alike, rather than by modern breeding. Colombian, Thai, Congolese and Oaxacan stock are the classic sativa cases. A landrace is variable, rather than a single plant: within a pack the flowering times, flowering times and aromas range widely than any tent-bred line, and that variation is the whole value of keeping one.
The mistake is treating a landrace like a finished hybrid. It brings habits that make sense in an open field, including a frame no tent can contain and a flowering clock tuned to an daylength most growers cannot offer. «Heirloom» on a listing usually refers to a landrace that has been grown out away from its origin for some generations, typically with a degree of selection towards indoor life; it is nearer to usable but nonetheless not a hybrid. A seller listing «landrace» without an origin region and a generation count is using the word loosely, and the seeds should be priced with that in mind.
Haze
Originally a particular line of plants bred in 1970s California from Mexican, Thai and South Indian landraces, and then kept and refined in the Netherlands. The Haze runs tall, fills out openly, flowers for twelve to sixteen weeks and carries a scent of spice, citrus and something metallic that no other line exactly reproduces.
In its second sense «Haze» is whatever cross which contains some of that family, which today is a great many of the sativa-leaning catalogue. A listing that says «Haze» and gives no lineage may be eighty percent original old family or one small fraction of it, and the flowering time follows the share, not the name. The useful question is not «is it a Haze» but «how much, and via which parent».
Flowering time
The figure of weeks between the onset of flowering and harvest, and the one most frequently misunderstood figure on a sativa pack. With photoperiod seed it is measured from the day the light drops to twelve hours, rather than from germination, so a «fourteen-week» sativa started with a ordinary vegetative period is a twenty-two-week plant. Breeders additionally give the shorter end of a range, because the other end moves less 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 after the flip. The catalogue can be filtered by that number, which is a sensible first pass for a room with a fixed schedule. A grower who allows four weeks on top of the figure the pack says is rarely disappointed.
Foxtailing
The habit of certain flowers to push out new calyx growth on top of old ones, giving spired, open buds rather than dense ones. In most tent-bred lines it is a heat symptom, typically caused by light that is too close or temperatures that is too high, and the standard response is to fix the cause.
In a good number of sativas, above all Southeast Asian and some Haze lines, it is built in and is going to happen in a flawless room. A new sativa grower often spends a month hunting a problem that was never a problem, lowering lights and heat and slowing an already slow flower further. The breeder rarely says which type you should expect; the lineage generally tells you.
Hermaphroditism in long-flowering lines
The production of pollen-bearing flowers on a female plant, usually towards the end in flower and often under stress. Every cannabis population has a degree of tendency to it; sativa lines show it more, and the reason is one plain reason: fourteen weeks of flower is sixteen weeks of exposure for a timer leak, a temperature spike or a missed watering to set it going, and an old plant has waited past its intended end often produces a few late pollen flowers on its own as a final attempt to set seed.
Not one of this means a sativa strain weak as a matter of nature; it means the grower’s discipline count over a longer stretch. A sealed room, stable conditions and harvesting the moment the plant is done rather than a weeks later take away most of the problem. A listing which states the breeder tests parents for hermaphrodite tendency is saying something worth hearing on a long-flowering line than on anything else.
Stretch (the doubling)
The surge of vertical growth that follows the switch to flowering. Most tent-bred plants gain around half again; sativas routinely double, and some landrace lines triple. The stretch continues three to four weeks and cannot be stopped after it begins, only bent sideways by training.
In tent terms, the stretch multiplier is the number worth read ahead of deciding when to flip. A sativa switched at sixty centimetres centimetres in a two-metre tent is at the lamp before week four of flower; one flipped at thirty centimetres has room. People moving over from indica stock almost always flip too late the first time, and the consequence is visible on the ceiling of the tent.
Terpinolene
A terpene present in high proportion in many old sativa lines and responsible for much of the thing growers mean as a «sativa» smell: green, piney, lemon and slightly sweet at once. It is volatile, lost quickly by hot drying, and it fades faster during storage than the earthier terpenes that dominate most tent stock.
For a seed buyer the name does two jobs. When a listing names terpinolene as the lead terpene, the strain probably carries substantial old-sativa ancestry whatever the percentage says. And when the grower wants that profile to still be there to the jar, the cure has to be cool and cool; a warm dry flattens a terpinolene line into a flower that smells of hay and leaves no trace of what the pack described.
Latitude (outdoor sativas)
The single number that determines if a sativa will finish outdoors, and one that no pack states. Equatorial plants require the run of shortening days to continue late enough for the plant ripen; in northern latitudes the frost arrives first, and the grower cuts an half-finished plant in late October or else watches it to mould in November. The further south, within a northern hemisphere, the longer the season stretches, and Mediterranean or subtropical growers can ripen lines that temperate growers cannot.
The practical rule for a seed pack: an «outdoor» sativa finishing date is given for the breeder’s own latitude, normally a point within temperate Europe or the western United States, and each step further north of it pushes the date back into the weather. A grower north of about the fiftieth parallel that is after a true sativa outdoors is looking for a sativa autoflower or a covered space, and not a longer summer.
Equatorial (the twelve-hour problem)
Describes lines from regions in which daylength hardly changes through the year, and that the plant does not develop a strong reaction to shortening days. These plants often start flowering reluctantly at a conventional twelve-hour schedule, because twelve hours is, for them, an unremarkable day rather than a signal.
The practical fix, handed around between sativa growers over decades, is to shorten the light more: eleven hours, sometimes ten, particularly in the last weeks. It costs some yield yield and buys a earlier clearer finish. A listing which uses «equatorial» is warning you about this in one word, and a grower that takes it as a note on origin misses the point hidden in it.
Sativa-dominant
A marketing term and not a measurable one. The phrase usually means that the larger share of a hybrid’s lineage were described as sativa by the breeder who wrote the description, which sometimes means no more than a certain the buds are airier or the smell brighter than the same breeder’s indica-labelled releases.
The effect people connect with a word, clear-headed rather than sedating, is driven more by terpene profile and the cannabinoid balance than by ancestry, and a good number of «sativa-dominant» hybrids produce a flat couch effect while a good number of indica-labelled stock deliver the reverse. For a buyer the label is worth something as a rough hint to growth habit, flowering time and stretch; for a predictor to effect it is close to useless unless accompanied by the aroma description.
