Sativa seeds arrive with more jargon attached than any other category of cannabis seed, and most of it says a certain thing to a botanist, something else to a seed company and a third to the grower standing in front of the listing. 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 statement of effect, a landrace chosen like it were a tent-bred hybrid. The entries below are written with the range at https://hazesativaseeds.com to hand for reference, because it leans heavily to the classic end of the category where the words matter most; the meanings though apply to any sativa seed from any seller. They are in no particular order, because none of them makes usable on its own without the others.
Haze
In its first sense a specific family of plants put together in 1970s California from Colombian, Colombian and Thai parents, and then preserved and refined in the Netherlands. A true Haze runs tall, branches openly, takes for twelve sixteen weeks and carries a scent of spice, citrus and something metallic that no other line quite reproduces.
In its second sense “Haze” is any cross that carries some of that family, and today is a great many of the sativa-leaning market. A listing that reads “Haze” and gives no lineage may be mostly percent the old family or one sixteenth of it, and the flowering character follows the fraction, not the name. The working question is not “is it a Haze” but “how much, and through which parent”.
Landrace
A population of plants adapted over centuries to a particular place by local growers and climate alike, rather than by modern breeding. Thai, Thai, Congolese and Oaxacan stock are the sativa examples. A landrace is a spread, rather than a one plant: inside a pack the flowering times, flowering times and aromas spread widely than a tent-bred line, and this spread is the whole value of keeping one.
The mistake is buying a landrace like a finished product. It carries traits that make sense in an equatorial field, such as height no tent can hold and a flowering clock set to an daylength most growers never provide. “Heirloom” on a listing usually means a landrace that has been grown out somewhere for a number of generations, typically with light selection for indoor life; it is closer to usable but nonetheless not a hybrid. A seller offering “landrace” that does not give a origin point and a reproduction count is using the word as a flavour, and the pack should be priced accordingly.
Sativa-dominant (the label)
A catalogue term and not a botanical one. It generally means that more of a hybrid’s parents are described as sativa by whoever drafted the listing, and sometimes signals nothing more than a certain the buds are longer or the smell brighter than the same breeder’s other lines.
The effect people connect with the word, lively instead of heavy, is driven more by terpene profile and the cannabinoid content than it is by the sativa fraction, and a good number of “sativa-dominant” hybrids deliver a flat sleepy result and plenty of indica-labelled lines deliver the reverse. To a buyer the percentage is worth something as a rough guide to growth habit, flowering time and stretch; as a guide to how it feels it is close to worthless unless accompanied by the terpene notes.
Stretch
The surge of upward growth that follows the change to flowering. Indica-leaning plants gain around half again; sativas routinely double, and some landrace types go further. The stretch lasts three to five weeks and cannot be stopped after it has started, merely redirected by training.
In tent terms, the stretch figure is the fact worth read ahead of deciding when to switch. A sativa flipped at sixty centimetres in a two-metre tent is touching the lamp by week four of flower; one switched at thirty centimetres has room. Growers moving from indica stock almost always flip too late the first time, and the lesson is written on the ceiling of the tent.
Foxtailing
The tendency of some flowers to push out new calyx growth on top of old ones, giving towered, open buds rather than dense ones. In the majority of indica-leaning lines it is a heat response, usually from light that is too close or a room too high, and the advice is to correct the room.
In many sativas, above all Southeast Asian and some Haze hybrids, it is genetic and is going to occur under a flawless room. A first-time sativa grower frequently spends weeks chasing a problem that is a problem, dropping lights and temperatures and slowing a slow flower even more. The breeder seldom says which kind you should expect; the lineage generally does.
Terpinolene (the “sativa smell”)
A terpene found in large amounts in many classic sativa strains and responsible for most of what growers describe as a “sativa” smell: green, woody, citrus and faintly sweet all at once. It is fragile, driven off easily through fast drying, and terpinolene fades more quickly in storage than the heavier terpenes which lead most tent lines.
To a seed buyer the name does two jobs. When a listing names terpinolene as the lead terpene, the line most likely carries real old-sativa ancestry whatever the label claims. And when the grower are after that profile to still be there to the jar, the cure is going to be cool and cool; a warm dry flattens a terpinolene line to something that tastes of very little and leaves no trace of what the pack described.
Latitude
The single number that determines whether a sativa can ripen outdoors, and one no pack states. Long-flowering lines need the autumn days to continue long enough for the plant to finish; in northern latitudes the frost arrives before that, and the grower harvests a half-finished plant in the end of October or else watches it rot in November. A closer to the equator, in the northern hemisphere, the later the season stretches, and Mediterranean and subtropical gardens can finish lines that temperate growers cannot.
The practical reading of a seed pack: an “outdoor” line finishing date is stated for the breeder’s own latitude, normally a point within southern Europe or the west coast of the United States, and every step further north of it pushes the date later towards the weather. A grower above roughly the fiftieth parallel who wants a true sativa in the garden needs to be shopping for a sativa autoflower or a covered space, not a better summer.
Equatorial
Refers to plants from regions in which daylength hardly varies through the year, which means where the plant does not evolved a sharp response to shortening days. These plants often flower reluctantly at a conventional twelve-hour schedule, since twelve hours is, for them, an unremarkable day and not a signal.
The practical response, passed around among sativa growers over decades, is to shorten the light further: eleven hours, sometimes ten, especially during the last weeks. It loses a little yield and gains a earlier clearer finish. A listing which uses “equatorial” is warning you about this with one word, and a grower that takes it as a note on origin has missed the instruction hidden in it.
Intersex tendency
The production of male flowers on a female plant, typically towards the end in flower and frequently under stress. Every cannabis population has a degree of tendency for do; sativa plants express it more often, and the reason is a simple one: fourteen weeks of flower is sixteen weeks of exposure for a light leak, a heat spike or a late watering to trigger it going, and a plant that has waited past its intended finish often throws a few late male sacs on its own in a last effort to make seed.
None of this means a sativa strain weak as a matter of course; it makes the room’s discipline count for longer. Light-tight room, stable conditions and harvesting when the plant is done rather than two week after take away most of the problem. A listing which states the breeder screens parents for intersex tendency is worth more on a long-flowering line than on any other category.
