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 a third to the grower standing in front of the pack. The failed sativa grow usually goes back to a word that was read in the wrong one of those senses: a flowering time taken as a promise, a «sativa-dominant» label read as a description of character, a landrace bought as if it were a modern hybrid. The entries below are written with the range at https://hazesativaseeds.com to hand for reference, since it leans strongly towards the classic end of the spectrum where the vocabulary matter most; the meanings themselves hold to any sativa seed from any seller. They are given in no particular order, since none of them makes usable on its own without the others.
Landrace versus heirloom
A population of plants shaped through generations to a particular place by the local growers and growers together, rather than by modern breeding. Thai, Colombian, Congolese and Mexican stock are the classic sativa examples. A landrace is variable, not a single plant: inside a pack the heights, flowering times and aromas spread far more than in any tent-bred line, and that spread is the point of keeping one.
The trap is treating a landrace like a modern hybrid. It brings traits that make sense in an equatorial field, including height no tent can contain and a flowering clock set to a equatorial daylength the majority of growers cannot provide. «Heirloom» on a listing usually refers to a landrace that has been grown out somewhere for some generations, often with light selection for indoor conditions; it is nearer to usable but nonetheless far from uniform. A seller offering «landrace» without a origin point and a reproduction count is using the word as a flavour, and the pack should be judged with that in mind.
Flowering time
The figure of weeks between the onset of flowering and maturity, and the single most misunderstood number on a sativa pack. For photoperiod seed it is counted from the day the light is cut to twelve hours, rather than from germination, so a «fourteen-week» sativa grown with a eight-week vegetative stage is a twenty-two-week plant. Breeders additionally give the shorter end of the spread, because the other end sells fewer seed.
Long-flowering lines run everywhere from ten weeks to more than twenty, and the longest strain in the Haze Sativa Seeds range comes in at about 16 weeks after the switch. The catalogue can be sorted by that number, which is a sensible first pass if you have a room on a fixed timetable. A grower who allows four weeks to the figure the pack states is seldom caught out.
Intersex tendency
The appearance of male flowers on a female plant, typically late in flower and frequently under stress. Every cannabis line has some tendency to it; long-flowering plants show it more often, and the reason is a plain one: sixteen weeks of flower is fourteen weeks of exposure for a light leak, a heat spike or a late watering that can set it off, and a old that has already gone past its intended end often produces a few desperate male flowers on its own as a final effort to set seed.
Not one of this means a sativa strain unstable as a matter of nature; it makes the room’s consistency count over a longer stretch. A sealed tents, steady conditions and harvesting the moment the plant is ready and not two weeks later remove most of the risk. A listing which states the breeder screens parents for hermaphrodite tendency is saying something worth hearing on a sativa than on any else.
Stretch
The surge of vertical growth which follows the change to flowering. Indica-leaning plants gain half again; sativas routinely double, and some equatorial lines triple. The stretch continues three to four weeks and will not be stopped after it has started, only bent sideways by training.
In tent terms, the stretch figure is the number worth read ahead of deciding when to switch. A sativa switched at sixty centimetres in a standard tent is at the lamp by week four of flower; one switched at thirty centimetres centimetres has room. Growers moving over from indica stock nearly always switch too late the first time, and the consequence is visible on the ceiling of the tent.
Foxtailing (and when it is not a fault)
The tendency of certain flowers to push out new bud clusters on top of existing ones, producing spired, open buds rather than dense ones. In most tent-bred lines it is a heat symptom, usually caused by light that is too close or a room that is too high, and the advice is to fix the room.
In many sativas, especially Thai and certain Haze hybrids, it is genetic and is going to occur under a perfect room. A first-time sativa grower frequently wastes a month chasing a problem that was never not there, lowering lights and heat only delaying a slow plant further. The listing rarely says which type to expect; the parentage generally does.
Terpinolene
A terpene present in large amounts in many classic sativa lines and accounting for much of the thing growers describe as a «sativa» smell: green, woody, citrus and slightly floral at once. It is fragile, driven off easily by fast drying, and terpinolene degrades faster during storage than the heavier terpenes which dominate indica-leaning lines.
To a seed buyer the word does two jobs. Where a listing names terpinolene among the lead terpene, the strain probably carries substantial Haze-era ancestry whatever the percentage claims. And where the you wants that profile to survive by the jar, the drying is going to be cool and cool; a fast dry flattens a terpinolene sativa to a flower that tastes of very little and leaves nothing of what the pack described.
Sativa-dominant (the label)
The catalogue category and not a measurable one. It generally means that more of a hybrid’s parents are described as sativa by whoever wrote the listing, which sometimes means no more than a certain the buds are airier or the smell brighter than the same breeder’s indica-labelled lines.
The experience people associate with a word, clear-headed instead of heavy, is governed more by terpene chemistry and by cannabinoid balance than it is by the sativa fraction, and a good number of «sativa-dominant» releases deliver a flat sleepy effect and a good number of indica-labelled stock deliver exactly the reverse. To a buyer the percentage is worth something for a loose guide to growth habit, flowering time and stretch; for a guide to how it feels it is next to worthless unless accompanied by the terpene notes.
Haze (the family, not the smell)
In its first sense a specific line of plants bred in coastal California from Colombian, Colombian and Thai landraces, and then kept and refined in the Netherlands. The Haze runs tall, fills out openly, flowers for twelve sixteen weeks and carries a scent of incense, citrus and something metallic that no line exactly reproduces.
In its second sense «Haze» is any hybrid that carries a share of that family, which by now is most of the sativa-leaning market. A listing which reads «Haze» without lineage may be mostly percent original classic family or a small fraction of it, and the grow character follows the share, not the name. The useful question is never «is it a Haze» but «how much, and via which parent».
Equatorial (the twelve-hour problem)
Describes lines from regions in which daylength hardly varies across the year, and that the plant does not develop a sharp reaction to shortening days. These plants frequently start flowering reluctantly under a standard twelve-hour light cycle, since twelve hours is, to them, a mild ordinary day rather than a signal.
The working fix, passed around between sativa growers over decades, is to shorten the light more: eleven hours, occasionally ten, especially during the final weeks. It costs a little yield and buys an earlier clearer end. A listing that says «equatorial» is warning you this with one word, and a grower that reads it as a note on origin misses the instruction hidden in it.
Latitude
The single number that determines if a sativa can ripen outdoors, and a number no pack prints. Equatorial lines require a run of shortening days to continue long enough to let the plant ripen; at high latitudes the frost comes before that, and the grower cuts an half-finished plant in late October or else loses it to mould in November. A closer south, within the northern hemisphere, the later the window runs, and Mediterranean or subtropical growers are able to ripen lines that northern growers never will.
The practical rule of a seed listing: an «outdoor» sativa harvest month is stated for the breeder’s home latitude, normally a point in southern Europe or the western United States, and every step north of that pushes the finish later towards the weather. A grower north of roughly the fiftieth parallel who wants a true sativa outdoors needs to be shopping for an autoflower or a greenhouse, and not a better summer.
