Sativa Seeds, Term by Term
Sativa seeds arrive with more vocabulary attached than any other category of cannabis seed, and a good deal of it says a certain thing to a botanist, something else to a breeder and something different again to the person standing in front of the pack. A failed sativa grow nearly always goes back to a word that was read in the wrong one of those senses: a flowering time taken as a fixed number, a “sativa-dominant” label read as a description of character, a landrace bought as if it were a tent-bred hybrid. The entries below were put together with the range at https://hazesativaseeds.com open as the concrete examples, since it runs strongly towards the classic end of the category where the vocabulary carry the most weight most; the definitions themselves apply to any sativa seed from any seller. They are in no particular order, since none of them is sense on its own without the rest.
Terpinolene (the “sativa smell”)
A terpene present in large amounts in a lot of old sativa lines and accounting for most of what people describe as the “sativa” aroma: green, piney, citrus and faintly sweet at once. It is volatile, driven off easily by fast drying, and it degrades more quickly during storage than the heavier terpenes which dominate indica-leaning stock.
To a seed buyer the word does two things. When a listing names terpinolene among the lead terpene, the strain most likely has real old-sativa genetics regardless of what the label claims. And when the grower wants that smell to still be there to the jar, the drying is going to be slow and slow; a fast dry turns a terpinolene line to a flower that smells of very little and nothing of what the pack promised.
Stretch
The surge of vertical growth that comes after the switch 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 will not be halted once it begins, only redirected by training.
In practical terms, the stretch multiplier is the fact worth reading before deciding when to switch. A sativa switched at sixty centimetres centimetres in a two-metre tent is touching the lamp before week four of flower; one flipped at thirty centimetres has room. People coming from indica stock nearly always flip too late the first time, and the lesson is visible on the ceiling of the tent.
Equatorial (the twelve-hour problem)
Refers to plants out of latitudes where daylength hardly varies across the year, which means that the plant never evolved a strong reaction to changing days. These plants often flower reluctantly under a conventional twelve-hour schedule, since twelve hours is, to them, a mild ordinary day rather than a signal.
The practical fix, passed down between sativa growers for decades, is to shorten the light more: eleven hours, occasionally ten, particularly in the last weeks. It loses a yield yield and gains an earlier clearer end. A listing which uses “equatorial” is warning you this in one word, and a grower that takes it as a note on origin misses the point inside it.
Sativa-dominant
A marketing term and not a measurable one. It usually indicates that the larger share of a hybrid’s parents were described as sativa according to the breeder who drafted the description, which occasionally signals no more than that the buds are longer or the aroma sharper than the that breeder’s other lines.
The effect people connect with the word, clear-headed rather than heavy, is driven far more by terpene chemistry and by cannabinoid balance than by the sativa fraction, and plenty of “sativa-dominant” hybrids deliver a heavy couch effect and plenty of indica-labelled stock do the opposite. To a grower the label is useful for a rough guide to growth habit, flowering time and stretch; as a predictor to how it feels it is next to useless unless accompanied by the aroma description.
Landrace versus heirloom
A population of plants shaped over centuries to a particular place by local climate and climate together, rather than by deliberate breeding. Thai, Colombian, Malawian and Oaxacan stock are the classic sativa cases. A landrace is a spread, rather than a single plant: within a pack the flowering times, flowering times and aromas spread widely than in a tent-bred line, and this variation is the whole value of growing one.
The mistake is buying a landrace like a finished product. It brings habits that made sense in an open field, including a frame no tent can hold and a flowering rhythm tuned to an equatorial daylength the majority of growers never provide. “Heirloom” in a listing usually refers to a landrace that has been reproduced away from its origin for some generations, often with light selection towards indoor life; it is closer to usable but still not uniform. A seller offering “landrace” that does not give an origin region and a generation count is using the word loosely, and the pack should be judged with that in mind.
Intersex tendency
The appearance of male flowers on a female plant, usually late in flower and frequently in response to stress. Every cannabis population carries a degree of tendency for do; sativa plants show it more, and the reason is a plain reason: sixteen weeks of flower is sixteen weeks of opportunity for a light leak, a heat spike or a missed watering that can trigger it off, and an old that has gone beyond its intended finish frequently produces a few late male sacs on its own in a final attempt to make seed.
None of this means a sativa strain weak by nature; it means the room’s consistency matter over a longer stretch. A sealed tents, steady temperatures and cutting when the plant is ready and not a weeks later take away the greater part of the problem. A listing that states the breeder tests parents for intersex tendency is saying something more on a long-flowering line than for anything other category.
Haze (the family, not the smell)
In its first sense a particular line of plants bred in coastal California from Colombian, Colombian and Thai landraces, and later preserved and worked in the Netherlands. The Haze grows tall, fills out sparsely, flowers for twelve to to sixteen weeks and carries a scent of spice, pine and a note metallic that no other line quite has.
In its second sense “Haze” is whatever hybrid that contains some of that family, and today is most of the sativa-leaning catalogue. A listing that says “Haze” and gives no parents could be mostly percent original classic family or one small fraction of it, and the flowering character follows the share, not the name. The useful question is not “is it a Haze” but “how much, and via which parent”.
Latitude (outdoor sativas)
The single number that decides if a sativa can finish outdoors, and a number that no pack prints. Equatorial plants require a autumn days to go on late enough for the plant finish; at high latitudes the frost arrives before that, and the grower harvests an half-finished plant in late October or watches it to mould in November. The further to the equator, within a northern hemisphere, the longer the season runs, and coastal or subtropical growers are able to finish plants that northern gardens never will.
The usable reading of a seed listing: an “outdoor” line finishing month is given for the breeder’s home latitude, usually somewhere in temperate Europe or the west coast of the United States, and every degree further north of that pushes the date later into the frost. A grower north of roughly the fiftieth parallel who is after a true sativa outdoors is looking for a sativa autoflower or a covered space, and not a better season.
Flowering time (and what it is counted from)
The number of weeks from the onset of flowering and maturity, which is the one most misread figure on a sativa pack. For photoperiod seed it is measured from the day the light is cut to twelve hours, not from sowing, so a “fourteen-week” sativa started with a ordinary vegetative stage is a five-month plant. Seed companies additionally give the optimistic end of the range, since the longer end moves fewer seed.
Sativa lines take everywhere from ten weeks to more than twenty, and the slowest strain in the Haze Sativa Seeds range comes in at around 16 weeks after the flip. The catalogue can be sorted by this number, which is the reasonable first pass if you have a grower on a fixed schedule. A grower who allows four weeks on top of whatever the pack says is seldom caught out.
Foxtailing
The habit of some flowers to push out new calyx clusters on top of old ones, producing towered, irregular buds instead of round ones. In most tent-bred lines it is a stress response, usually from light too close or temperatures too high, and the advice is to correct the room.
In many sativas, above all Thai and certain Haze hybrids, it is built in and will occur under a flawless room. A new sativa grower often wastes a month chasing a problem that is a problem, lowering lights and temperatures and slowing an already long plant further. The listing rarely warns which kind to expect; the lineage usually does.
