Sativa seeds come with more jargon attached than any other kind of cannabis seed, and most of it means a certain thing to a botanist, another to a breeder and a third to the person standing in front of the listing. The failed sativa grow usually traces back to a word that was understood in the wrong one of those senses: a flowering time taken as a promise, a “sativa-dominant” label read as a statement of effect, a landrace bought as if it were a modern hybrid. The entries below are put together with the range at https://hazesativaseeds.com to hand as the concrete examples, since it leans strongly to the classic end of the spectrum and that is where the words matter most; the meanings though apply to any sativa seed from any seller. They are given in no particular order, since not one of them is usable without the rest.
Haze (the family, not the smell)
Originally a particular line of plants bred in coastal California from Colombian, Colombian and South Indian parents, and then kept and refined in the Netherlands. The Haze grows tall, fills out openly, takes for twelve to sixteen weeks and smells of spice, pine and a note metallic that no other line quite has.
In its looser sense “Haze” is whatever hybrid which contains some of that family, and today is a great many of the sativa-leaning catalogue. A listing which reads “Haze” and gives no parents could be eighty percent original classic family or a sixteenth of it, and the flowering time follows the fraction, not the name. The useful question is not “is it a Haze” but “how much, and through which parent”.
Latitude
The single number that decides whether a sativa will finish outdoors, and one that no pack prints. Equatorial lines need a autumn days to continue long enough for the plant finish; in northern latitudes the frost comes first, and the grower harvests a half-finished plant in the end of October or loses it to mould in November. A closer south, in the northern hemisphere, the later the season runs, and coastal and low-latitude gardens are able to ripen plants that northern growers cannot.
The practical rule of a seed listing: an “outdoor” sativa harvest month is stated for the breeder’s home latitude, usually somewhere within southern Europe or the western United States, and every step further north of it moves the finish back towards the frost. A grower above about the fiftieth parallel who is after a true sativa outdoors is shopping for an autoflower or else a greenhouse, not a longer summer.
Flowering time (and what it is counted from)
The number of weeks between the onset of flowering and maturity, which is the single most frequently misunderstood 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 a ordinary vegetative period is a twenty-two-week plant. Breeders additionally give the optimistic end of a range, because the longer end sells fewer seed.
Sativa lines run anywhere from ten weeks to well over twenty, and the slowest strain in the Haze Sativa Seeds range is at around 16 weeks from the switch. The catalogue can be filtered by that number, which is the reasonable first step for a grower on a fixed timetable. A grower who allows four weeks on top of whatever the pack states is seldom disappointed.
Landrace
A population of plants adapted through generations to a particular place by the local growers and climate together, and not by modern selection. Thai, Thai, Malawian and Oaxacan stock are the classic sativa cases. A landrace is variable, rather than a single plant: within a pack the heights, flowering times and aromas spread far more than in a tent-bred hybrid, and that variation is the whole value of growing one.
The mistake is buying a landrace like a modern product. It carries traits that make sense in an equatorial field, such as a frame no tent can contain and a flowering rhythm tuned to a equatorial daylength the majority of growers never provide. “Heirloom” on a listing generally means a landrace that has been reproduced away from its origin over a number of generations, often with a degree of selection towards tent conditions; it is nearer to usable but nonetheless far from uniform. A shop listing “landrace” that does not give a origin point and a reproduction count is using the word loosely, and the seeds should be priced accordingly.
Hermaphroditism in long-flowering lines
The production of male flowers on a female plant, usually towards the end in flower and frequently under stress. Every cannabis line carries some tendency for it; long-flowering plants show it more often, for a plain reason: sixteen weeks of flower is sixteen weeks of opportunity for a timer leak, a heat spike or a late watering to set it going, and a old that has waited beyond its natural finish often throws a few late pollen sacs on its own in a last attempt to make seed.
Not one of these makes a sativa line weak as a matter of nature; it means the room’s consistency matter over longer. A sealed room, steady temperatures and cutting when the plant is ready rather than a weeks after take away the greater part of the problem. A listing that states a breeder screens parents for hermaphrodite traits is worth more on a sativa than on anything else.
Terpinolene
A terpene found in high proportion in a lot of old sativa lines and accounting for most of what people describe as a “sativa” aroma: green, woody, lemon and faintly sweet all at once. It is fragile, driven off quickly by hot drying, and terpinolene fades more quickly during storage than the heavier terpenes that dominate most tent stock.
To a seed buyer the name does two things. When a listing names terpinolene as the lead terpene, the line probably carries real Haze-era genetics regardless of what the percentage says. And where the you are after that profile to survive by the jar, the cure has to be slow and slow; a fast drying room flattens a terpinolene line into something that smells of very little and no trace of what the pack described.
Stretch (the doubling)
The burst of upward growth that follows the change to flowering. Most tent-bred plants gain around half their height again; sativas routinely double, and a few equatorial types go further. The stretch lasts two to four weeks and cannot be stopped once it begins, only redirected by training.
In tent terms, the stretch figure is the number to reading before deciding when to switch. A sativa switched at sixty centimetres inside a standard tent is touching the lamp by week four of flower; one switched at thirty centimetres has room. Growers moving from indica strains almost always switch too late the first time, and the consequence is visible on the ceiling of the tent.
Sativa-dominant
A catalogue term and not a measurable one. It generally indicates that the larger share of a hybrid’s lineage are classed as sativa by whoever wrote the description, and sometimes signals no more than that the buds are airier or the aroma sharper than the same breeder’s other lines.
The experience people associate with the word, lively rather than heavy, is governed far more by terpene profile and by THC content than by the sativa fraction, and plenty of “sativa-dominant” releases produce a flat couch effect while plenty of indica-labelled lines do exactly the opposite. To a buyer the percentage is worth something for a rough guide to growth habit, flowering time and stretch; as a predictor to effect it is close to useless unless accompanied by the aroma notes.
Foxtailing
The habit of certain flowers to push out new bud growth on top of old ones, producing towered, open buds rather than dense ones. In the majority of indica-leaning strains it is a stress symptom, usually from light too close or a room that is too high, and the advice is to correct the room.
In many sativas, especially Thai and certain Haze hybrids, it is genetic and will happen in a perfect room. A new sativa grower often spends a month chasing a problem that was never there, dropping lights and heat and delaying an already slow plant further. The listing rarely warns which kind to expect; the lineage usually tells you.