Sativa seeds arrive with more vocabulary around them than any other kind of cannabis seed, and most of it says one thing to a botanist, another to a breeder and something different again to the person standing in front of the pack. The failed sativa grow nearly always goes back to a word that was understood in the wrong one of those senses: a flowering time read as a promise, a “sativa-dominant” tag read as a description of effect, a landrace bought as if it were a tent-bred hybrid. The entries below are written with the range at https://hazesativaseeds.com to hand as the concrete examples, since it leans heavily to the long-flowering end of the spectrum 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, since not one of them makes sense on its own without the others.
Flowering time
The figure of weeks from the start of flowering and harvest, which is the single most misread figure on a sativa pack. For photoperiod seed it is measured from the day the light is cut to twelve hours, rather than from sowing, so a “fourteen-week” sativa started after a eight-week vegetative stage is a twenty-two-week plant. Seed companies additionally give the shorter end of the range, because the longer end moves fewer seed.
Long-flowering lines take everywhere from ten weeks to well over twenty, and the slowest line 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 reasonable first step if you have a room on a fixed timetable. A grower who allows four weeks to whatever the pack states is seldom caught out.
Terpinolene
A terpene found in large proportion in many old sativa strains and responsible for much of what growers describe as the “sativa” smell: fresh, woody, lemon and slightly floral all at once. It is fragile, lost easily through hot drying, and terpinolene fades more quickly during storage than the heavier terpenes that dominate most tent stock.
To a seed buyer the word earns two things. When a listing names terpinolene as the lead terpene, the strain most likely has substantial Haze-era ancestry whatever the label says. And when the grower are after that profile to still be there to the jar, the drying is going to be cool and cool; a fast dry flattens a terpinolene sativa into a flower that tastes of hay and leaves no trace of what the pack described.
Sativa-dominant
A marketing term rather than a botanical one. The phrase usually means that the larger share of a hybrid’s lineage were described as sativa by the breeder who wrote the listing, which occasionally signals nothing more than that the buds are airier or the aroma brighter than the that breeder’s indica-labelled lines.
The effect people associate with a word, clear-headed instead of sedating, is driven more by terpene chemistry and by THC balance than by ancestry, and plenty of “sativa-dominant” hybrids deliver a heavy sleepy effect and a good number of indica-labelled stock do exactly the reverse. To a grower the percentage is worth something for a rough hint to growth habit, flowering time and stretch; for a guide to how it feels it is close to worthless without the terpene description.
Landrace
A population of plants shaped through centuries to one region by the local growers and climate alike, and not by deliberate breeding. Colombian, Colombian, Congolese and Mexican stock are the sativa cases. A landrace is variable, rather than a single plant: inside a pack the heights, finishing times and smells range far more than any tent-bred line, and this variation is the point of growing one.
The mistake is treating a landrace as a modern hybrid. It brings traits that make sense in an open field, including a frame that no tent can hold and a flowering rhythm tuned to a daylength most growers cannot offer. “Heirloom” on a listing generally means a landrace that has been grown out somewhere over a number of generations, typically with light selection towards tent conditions; it is closer to manageable but still not uniform. A shop offering “landrace” that does not give an origin region and a reproduction history is using the word loosely, and the pack should be priced with that in mind.
Stretch (the doubling)
The surge of upward growth which comes after the change to flowering. Most tent-bred plants add half their height again; sativas routinely double, and some landrace lines go further. The stretch continues three to four weeks and cannot be halted after it begins, merely bent sideways by training.
In tent terms, a stretch multiplier is a number worth read ahead of choosing when to flip. A sativa flipped at sixty centimetres centimetres inside a two-metre tent is touching the lamp by week four of flower; one flipped at thirty centimetres has room. People moving over from indica stock almost always switch too late the first time, and the lesson is written on the ceiling of the tent.
Hermaphroditism in long-flowering lines
The production of male flowers on a female plant, typically late in flower and frequently in response to stress. Almost every cannabis line carries some capacity to it; long-flowering plants express it more, for one simple one: sixteen weeks of flower is fourteen weeks of opportunity for a timer leak, a temperature spike or a missed watering that can set it off, and an plant plant has gone past its intended finish frequently throws a few late pollen sacs on its own as a last effort to make seed.
None of this means a sativa line unstable as a matter of course; it makes the grower’s consistency count over a longer stretch. A sealed room, stable temperatures and cutting when the plant is done and not two week later remove the greater part of the risk. A listing which mentions a breeder tests parents for intersex tendency is saying something more on a long-flowering line than on anything other category.
Haze
In its first sense a particular line of plants bred in 1970s California from Mexican, Colombian and Thai landraces, and later kept and refined in the Netherlands. A true Haze runs tall, fills out sparsely, flowers for twelve to to sixteen weeks and carries a scent of spice, pine and a note sharp that no other line quite has.
In its looser sense “Haze” is whatever hybrid which carries a share of that family, which today is most of the sativa-leaning catalogue. A listing that reads “Haze” without lineage could be eighty percent original old family or a sixteenth of it, and the flowering time follows the share, not the name. The working question is not “is it a Haze” but “how much, and via which parent”.
Latitude (outdoor sativas)
The one number that decides if a sativa can ripen outdoors, and a number no pack prints. Equatorial lines require a autumn days to continue late enough for the plant finish; in high latitudes the frost comes before that, and the grower cuts an half-finished plant in the end of October or loses it to mould in November. The further to the equator, within a northern hemisphere, the longer the window stretches, and Mediterranean or subtropical gardens are able to ripen lines that temperate gardens cannot.
The usable rule for a seed listing: an “outdoor” sativa harvest date is given for the breeder’s own latitude, normally a point in temperate Europe or the west coast of the United States, and each degree further north of that moves the finish back towards the frost. A grower north of roughly the fiftieth parallel who wants a true sativa outdoors needs to be shopping for a sativa autoflower or else a greenhouse, not a longer summer.
Equatorial (the twelve-hour problem)
Describes lines from regions where daylength barely changes across the year, and where the plant does not evolved a strong response to shortening days. Such plants often flower reluctantly at a conventional twelve-hour light cycle, since twelve hours is, for them, an ordinary day and not a signal.
The practical fix, passed around between sativa growers for decades, is to cut the light further: eleven hours, sometimes ten, particularly in the last weeks. It costs a yield yield and buys a more clearer finish. A listing which uses “equatorial” is telling you this in one word, and a grower who reads it as a note on geography misses the instruction hidden in it.