Sativa seeds arrive with more jargon attached than any other kind of cannabis seed, and most of it says one thing to a botanist, another to a breeder and a third to the person trying to make a decision in front of the pack. A disappointing sativa grow usually traces back to a word that was understood in the wrong sense: a flowering time read 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 were put together with the range at https://hazesativaseeds.com to hand for reference, since it runs heavily towards the long-flowering end of the spectrum and that is where the words matter most; the meanings themselves apply to any sativa seed from any shop. They are in no particular order, since not one of them is usable without the others.
Stretch (the doubling)
The surge of upward growth that comes after the switch to flowering. Indica-leaning plants gain half again; sativas routinely double, and some equatorial types go further. The stretch continues three to five weeks and will not be halted once it has started, merely bent sideways by training.
In practical terms, the stretch multiplier is the fact to reading ahead of choosing when to switch. A sativa flipped at sixty centimetres centimetres inside a standard tent is touching the lamp before week four of flower; one flipped at thirty centimetres centimetres has room. People moving from indica strains nearly always flip too late the first time, and the lesson is visible on the ceiling of the tent.
Latitude (outdoor sativas)
The one figure that decides if a sativa can finish outdoors, and a number no pack prints. Equatorial lines need a autumn days to go on long enough for the plant ripen; in northern latitudes the frost arrives first, and the grower harvests an unripe plant in late October or watches it to mould in November. The closer to the equator, within a northern hemisphere, the longer the window runs, and coastal and low-latitude growers are able to ripen plants that northern gardens never will.
The usable rule for a seed pack: an “outdoor” sativa finishing date is given for the breeder’s home latitude, normally a point in southern Europe or the western United States, and every degree north of it pushes the date back towards the weather. A grower north of about the fiftieth parallel who is after a long-flowering sativa outdoors is shopping for a sativa autoflower or else a covered space, and not a better summer.
Haze (the family, not the smell)
Originally a particular line of plants put together in 1970s California from Mexican, Thai and Thai parents, and later kept and worked in the Netherlands. A true Haze runs tall, branches sparsely, flowers for twelve to to sixteen weeks and smells of spice, pine and something metallic that no other line quite reproduces.
In its looser sense “Haze” is whatever cross which carries a share of that family, and today is most of the sativa-leaning catalogue. A listing that says “Haze” without lineage may be mostly percent the classic family or one small fraction of it, and the grow time follows the share, not the name. The useful question is never “is it a Haze” but “how much, and through which parent”.
Foxtailing
The tendency of certain flowers to grow new calyx growth on top of old ones, producing towered, open buds rather than dense ones. In most tent-bred strains it is a stress response, typically caused by light too close or temperatures that is too high, and the advice is to fix the room.
In many sativas, above all Southeast Asian and certain Haze lines, it is genetic and is going to occur under a perfect room. A first-time sativa grower often spends weeks hunting a fault that is a problem, dropping lights and temperatures and delaying an already long plant even more. The breeder rarely says which kind to expect; the lineage usually tells you.
Sativa-dominant
A catalogue term and not a botanical one. The phrase usually means that more of a hybrid’s lineage were described as sativa according to the breeder who drafted the listing, and occasionally signals nothing more than a certain the buds are airier or the smell sharper than the same breeder’s other releases.
The experience people connect with the word, clear-headed rather than heavy, is driven far more by terpene chemistry and by cannabinoid balance than it is by ancestry, and a good number of “sativa-dominant” hybrids deliver a flat sleepy result and a good number of the opposite lines do the reverse. For a grower the label is useful as a rough hint to growth habit, flowering time and stretch; for a guide to effect it is close to useless unless accompanied by the aroma description.
Terpinolene (the “sativa smell”)
A terpene found in high proportion in many classic sativa strains and accounting for much of the thing growers describe as a “sativa” smell: green, woody, lemon and slightly floral all at once. It is volatile, driven off easily by fast drying, and terpinolene fades more quickly during the cure than the earthier terpenes that dominate most tent lines.
To a seed buyer the word does two things. Where a listing lists terpinolene among the lead aromas, the line probably has real old-sativa genetics whatever the percentage says. And where the you are after that profile to survive to the jar, the cure is going to be cool and slow; a warm dry flattens a terpinolene sativa into something that smells of very little and leaves no trace of what the pack promised.
Flowering time
The figure of weeks between the start of flowering and harvest, and the single most frequently 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 started with a ordinary vegetative period is a twenty-two-week plant. Breeders also give the shorter end of a range, because the longer end sells less seed.
Sativa plants take anywhere from ten weeks to more than twenty, and the longest line in the Haze Sativa Seeds range is at about 16 weeks from the flip. The catalogue can be sorted by that figure, which is a sensible first pass for a grower on a tight timetable. A grower who adds four weeks to whatever the pack says is seldom caught out.
Landrace
A population of plants adapted through generations to a particular place by local climate and growers together, rather than by modern breeding. Colombian, Colombian, Malawian and Mexican stock are the sativa cases. A landrace is a spread, rather than a one plant: within a pack the heights, finishing times and smells spread far more than a tent-bred line, and that variation is the point of growing one.
The trap is buying a landrace as a modern hybrid. It carries habits that made sense in an equatorial field, such as a frame that no tent can hold and a flowering clock set to an daylength the majority of growers cannot offer. “Heirloom” on a listing generally means a landrace that has been reproduced somewhere for a number of generations, often with a degree of selection for tent life; it is closer to manageable but nonetheless far from a hybrid. A shop offering “landrace” without a origin region and a reproduction history is applying the word loosely, and the pack should be judged accordingly.
Intersex tendency
The production of male flowers on a female plant, typically late in flower and often in response to stress. Every cannabis line carries a degree of tendency for it; sativa lines show it more often, and the reason is a simple one: sixteen weeks of flower is sixteen weeks of exposure for a light leak, a temperature spike or a late watering that can trigger it going, and an old plant has already waited beyond its intended end frequently produces a few late pollen sacs on its own in a final effort to set seed.
None of these means a sativa line unstable by nature; it means the room’s consistency matter for a longer stretch. A sealed room, steady conditions and harvesting the moment the plant is done and not two weeks later remove the greater part of the problem. A listing that mentions a breeder screens parents for intersex tendency is saying something worth hearing for a sativa than on any other category.