Sativa seeds come with more jargon around them than any other category of cannabis seed, and most of it means a certain thing to a botanist, something else to a breeder and something different again to the grower standing in front of the pack. A disappointing sativa grow nearly always goes back to a word that was understood in the wrong sense: a flowering time read as a fixed number, a “sativa-dominant” tag read as a statement of character, a landrace chosen as if it were a tent-bred hybrid. The entries below are written with the range at https://hazesativaseeds.com to hand for reference, because it runs strongly to the classic end of the spectrum where the words matter most; the definitions themselves apply to any sativa seed from any shop. They are in no special order, because none of them makes sense without the others.
Equatorial
Describes plants out of latitudes where daylength barely varies through the year, and where the plant never develop a strong response to changing days. Such plants often flower reluctantly at a conventional twelve-hour schedule, since twelve hours is, to them, an ordinary day and not a signal.
The practical fix, handed down among sativa growers over decades, is to shorten the light more: eleven hours, occasionally ten, particularly during the final weeks. It costs a little yield and gains a more decisive finish. A listing that says “equatorial” is telling you about this in one word, and a grower who takes it as a note on geography misses the point inside it.
Flowering time (and what it is counted from)
The number of weeks from the start of flowering and maturity, and the one most misread figure on a sativa pack. For photoperiod seed it is measured from the day the light drops to twelve hours, not from germination, so a “fourteen-week” sativa grown with an eight-week vegetative period is a five-month plant. Breeders also quote the shorter end of a range, because the longer end sells less seed.
Sativa lines take everywhere from ten weeks to well over twenty, and the longest strain in the Haze Sativa Seeds range comes in at about 16 weeks from the flip. The catalogue can be sorted by that number, which is the sensible first step for a grower with a tight schedule. A grower who adds four weeks to whatever the pack states is rarely caught out.
Haze (the family, not the smell)
In its first sense a particular line of plants put together in coastal California from Mexican, Colombian and Thai landraces, and then kept and worked in the Netherlands. The Haze runs tall, fills out sparsely, flowers for twelve to to sixteen weeks and smells of spice, pine and something sharp that no other line exactly has.
In its looser sense “Haze” is whatever cross that carries some of that family, which by now is most 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 time tracks the share, not the name. The useful question is never “is it a Haze” but “how much, and through which parent”.
Landrace
A population of plants shaped through centuries to a particular region by local growers and growers together, and not by modern selection. Thai, Thai, Congolese and Oaxacan stock are the sativa cases. A landrace is a spread, not a one plant: inside a pack the heights, flowering times and aromas spread far more than any tent-bred hybrid, and that spread is the point of growing one.
The mistake is treating a landrace like a modern hybrid. It carries traits that made sense in an open field, including height that no tent can contain and a flowering rhythm set to an equatorial daylength the majority of growers never provide. “Heirloom” in a listing usually means a landrace that has been grown out somewhere for some generations, typically with light selection towards indoor life; it is nearer to usable but still far from uniform. A seller offering “landrace” without an collection region and a reproduction count is using the word as a flavour, and the pack should be priced accordingly.
Latitude (outdoor sativas)
The single figure that determines if a sativa can ripen outdoors, and a number that no pack states. Long-flowering lines need the run of shortening days to continue long enough for the plant to finish; in high latitudes the frost arrives before that, and the grower harvests a half-finished plant in the end of October or else watches it to mould in November. The closer south, within a northern hemisphere, the later the season stretches, and coastal or low-latitude growers can ripen plants that northern growers cannot.
The usable rule for a seed pack: an “outdoor” sativa finishing month is stated for the breeder’s home latitude, usually somewhere within temperate Europe or the western United States, and each step north of that moves the finish back towards the frost. A grower north of roughly the fiftieth parallel that wants a true sativa in the garden is looking for an autoflower or else a covered space, and not a longer summer.
Foxtailing (and when it is not a fault)
The tendency of certain flowers to grow fresh bud clusters on top of old ones, producing towered, open buds instead of dense ones. In the majority of indica-leaning lines it is a stress response, usually from light too close or a room too high, and the advice is to fix the cause.
In a good number of sativas, above all Thai and some Haze lines, it is built in and will happen in a perfect room. A new sativa grower often spends a month hunting a fault that is not a problem, lowering lights and temperatures only slowing a slow flower further. The breeder seldom warns which kind to expect; the lineage generally tells you.
Sativa-dominant
The catalogue category and not a botanical one. The phrase generally means that the larger share of a hybrid’s lineage are classed as sativa by whoever wrote the description, and occasionally means no more than a certain the buds are longer or the aroma sharper than the same breeder’s indica-labelled lines.
The effect people associate with a word, lively instead of heavy, is governed more by terpene chemistry and the cannabinoid content than by the sativa fraction, and a good number of “sativa-dominant” releases deliver a heavy sleepy effect and plenty of indica-labelled lines deliver the opposite. For a grower the percentage is worth something as a rough guide to growth habit, flowering time and stretch; as a predictor to how it feels it is close to useless unless accompanied by the terpene notes.
Terpinolene
A terpene found in high proportion in many old sativa lines and accounting for most of the thing people describe as the “sativa” aroma: green, piney, lemon and faintly sweet at once. It is volatile, driven off quickly through fast drying, and terpinolene fades faster during storage than the earthier terpenes which dominate indica-leaning stock.
For a seed buyer the word earns two things. Where a listing names terpinolene as the lead aromas, the line most likely has substantial old-sativa ancestry regardless of what the label claims. And where the grower wants that profile to survive to the jar, the cure has to be cool and cool; a fast dry flattens a terpinolene line into a flower that tastes of hay and leaves nothing of what the pack promised.
Stretch (the doubling)
The surge of upward growth that follows the change to flowering. Indica-leaning plants add half their height again; sativas routinely double, and a few equatorial types go further. The stretch continues three to four weeks and cannot be stopped once it has started, merely bent sideways by training.
In tent terms, the stretch figure is the number to read ahead of choosing when to flip. A sativa switched at sixty centimetres centimetres inside a standard tent is at the lamp before week four of flower; one flipped at thirty centimetres has room. Growers moving from indica stock nearly always flip too late the first time, and the consequence is written on the ceiling of the tent.