Sativa seeds arrive with more vocabulary attached than any other kind of cannabis seed, and a good deal of it says one thing to a botanist, another to a seed company and something different again to the person standing in front of the pack. A disappointing sativa grow nearly always traces back to a word that was read in the wrong one of those senses: a flowering time read as a promise, a “sativa-dominant” tag taken 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 open as the concrete examples, because it leans strongly to the long-flowering end of the category where the words matter most; the definitions though hold to any sativa seed from any seller. They are given in no special order, because none of them makes usable on its own without the rest.
Landrace versus heirloom
A population of plants adapted through generations to a particular place by local climate and climate alike, and not by deliberate selection. Colombian, Colombian, Malawian and Oaxacan stock are the sativa examples. A landrace is a spread, rather than a single plant: inside a pack the flowering times, finishing times and aromas spread widely than a tent-bred hybrid, and that spread is the point of growing one.
The trap is treating a landrace as a finished hybrid. It brings traits that made sense in an open field, such as a frame that no tent can hold and a flowering clock tuned to a daylength the majority of growers never offer. “Heirloom” on a listing usually refers to a landrace that has been reproduced away from its origin over some generations, often with a degree of selection towards indoor life; it is nearer to manageable but still not uniform. A seller offering “landrace” without an origin point and a generation history is using the word as a flavour, and the pack should be judged accordingly.
Flowering time
The figure of weeks from the start of flowering and maturity, and the one most frequently misunderstood figure on a sativa pack. With photoperiod seed it is measured from the day the light is cut to twelve hours, not from germination, so a “fourteen-week” sativa started with a ordinary vegetative stage is a five-month plant. Seed companies also quote the shorter end of a spread, since the other end sells less seed.
Long-flowering lines run everywhere from ten weeks to more than twenty, and the slowest line in the Haze Sativa Seeds range is at around 16 weeks after the flip. The catalogue can be sorted by this figure, which is a sensible first pass for a grower on a fixed schedule. A grower who adds four weeks on top of the figure the pack states is seldom caught out.
Stretch
The surge of upward growth that follows the change to flowering. Indica-leaning plants gain around half again; sativas routinely double, and a few landrace lines go further. The stretch continues two to four weeks and cannot be stopped after it begins, merely redirected by training.
In tent terms, a stretch figure is the fact to reading before deciding when to flip. A sativa switched at sixty centimetres in a two-metre tent is at the lamp before week four of flower; one flipped at thirty centimetres centimetres has room. Growers moving over from indica stock almost always switch far too late the first time, and the lesson is visible on the ceiling of the tent.
Haze
In its first sense a specific family of plants put together in coastal California from Mexican, Thai and Thai parents, and later preserved and worked in the Netherlands. A true Haze runs tall, branches sparsely, takes for twelve to sixteen weeks and smells of spice, citrus and something sharp that no line quite reproduces.
In its second sense “Haze” is any cross which carries a share of that family, and by now is a great many of the sativa-leaning market. A listing that reads “Haze” without parents could be eighty percent original classic family or one sixteenth of it, and the flowering character follows the fraction, not the name. The working question is never “is it a Haze” but “how much, and via which parent”.
Sativa-dominant (the label)
The marketing category rather than a measurable one. The phrase usually indicates that the larger share of a hybrid’s lineage are described as sativa according to whoever wrote the description, and sometimes signals no more than a certain the flowers are longer or the aroma brighter than the same breeder’s other releases.
The effect people associate with the word, lively instead of sedating, is driven far more by terpene profile and the cannabinoid content than it is by ancestry, and plenty of “sativa-dominant” releases deliver a flat couch effect while plenty of indica-labelled stock deliver exactly the reverse. To a buyer the label is worth something for a loose guide to growth habit, flowering time and stretch; for a predictor to how it feels it is close to useless without the aroma description.
Terpinolene (the “sativa smell”)
A terpene found in high proportion in a lot of classic sativa strains and responsible for most of what people mean as a “sativa” aroma: fresh, piney, lemon and faintly sweet at once. It is fragile, lost quickly through fast drying, and it fades faster during the cure than the heavier terpenes that lead most tent stock.
To a seed buyer the word does two things. Where a listing names terpinolene as the lead aromas, the strain most likely has real old-sativa genetics whatever the label claims. And where the grower wants that smell to survive to the jar, the drying has to be cool and cool; a fast dry flattens a terpinolene sativa into something that tastes of hay and leaves nothing of what the pack promised.
Latitude (outdoor sativas)
The one number that determines whether a sativa will ripen outdoors, and a number no pack states. Long-flowering plants require the autumn days to continue late enough to let the plant ripen; at northern latitudes the frost arrives before that, and the grower harvests a half-finished plant in the end of October or loses it rot in November. A closer south, in a northern hemisphere, the longer the season runs, and coastal or low-latitude growers are able to finish lines that temperate growers never will.
The practical rule for a seed listing: an “outdoor” sativa finishing month is given for the breeder’s own latitude, normally a point in temperate Europe or the west coast of the United States, and each step further north of that pushes the finish back towards the frost. A grower above roughly the fiftieth parallel that is after a true sativa outdoors is looking for a sativa autoflower or else a greenhouse, not a longer summer.
Hermaphroditism in long-flowering lines
The production of pollen-bearing flowers on a female plant, usually late in flower and often under stress. Every cannabis population has a degree of tendency to it; sativa plants express it more, and the reason is a plain one: sixteen weeks of flower is sixteen weeks of exposure for a light leak, a heat spike or a missed watering that can trigger it going, and an plant that has waited past its natural end frequently produces a few desperate pollen flowers on its own as a final attempt to make seed.
None of these makes a sativa strain weak as a matter of nature; it makes the grower’s discipline count over a longer stretch. Light-tight tents, stable temperatures and harvesting the moment the plant is done and not a week later remove most of the problem. A listing that mentions the breeder tests parents for hermaphrodite tendency is saying something worth hearing for a long-flowering line than on any else.
Equatorial (the twelve-hour problem)
Describes lines from latitudes in which daylength barely varies across the year, and where the plant never develop a sharp response to shortening days. Such lines often start flowering slowly under a conventional twelve-hour light cycle, since twelve hours is, for them, an ordinary day and not a signal.
The working fix, passed around between sativa growers over decades, is to cut the light more: eleven hours, sometimes ten, particularly in the last weeks. It costs a yield yield and buys a earlier clearer finish. A listing that says “equatorial” is warning you this with one word, and a grower who reads it as a note on geography has missed the instruction hidden in it.