Sativa seeds arrive with more vocabulary attached than any other category of cannabis seed, and most of it says one thing to a botanist, something else to a seed company and a third to the grower standing in front of the pack. The failed sativa grow usually goes back to a word that was understood in the wrong one of those senses: a flowering time read as a fixed number, a « sativa-dominant » label taken as a description of character, a landrace bought as if it were a tent-bred hybrid. The entries below were written with the range at https://hazesativaseeds.com open for reference, because it leans heavily to the long-flowering end of the spectrum and that is where the words carry the most weight most; the definitions though hold to any sativa seed from any shop. They are in no particular order, since not one of them is sense without the rest.
Intersex tendency
The production of male flowers on a female plant, typically towards the end in flower and frequently under stress. Every cannabis line carries some capacity to it; sativa lines express it more, and the reason is a simple reason: fourteen weeks of flower is sixteen weeks of exposure for a timer leak, a heat spike or a late watering to trigger it off, and an old that has already gone beyond its intended finish frequently throws a few late pollen flowers on its own in a last effort to make seed.
Not one of this makes a sativa line unstable as a matter of course; it makes the grower’s discipline count for a longer stretch. Light-tight room, stable temperatures and cutting when the plant is done and not two weeks after take away the greater part of the problem. A listing that states a breeder screens parents for hermaphrodite tendency is saying something worth hearing on a long-flowering line than on any else.
Latitude (outdoor sativas)
The one number that determines if a sativa will ripen outdoors, and a number that no pack states. Long-flowering plants require the autumn days to continue late enough to let the plant finish; in high latitudes the frost arrives first, and the grower cuts a half-finished plant in late October or loses it rot in November. The closer to the equator, in a northern hemisphere, the later the window stretches, and Mediterranean or low-latitude gardens can finish lines that northern gardens never will.
The usable rule for a seed listing: an « outdoor » line harvest date is stated for the breeder’s own latitude, normally somewhere within southern Europe or the west coast of the United States, and every degree further north of that pushes the date back into the frost. A grower north of roughly the fiftieth parallel that is after a true sativa in the garden is looking for a sativa autoflower or else a covered space, not a longer season.
Terpinolene (the « sativa smell »)
A terpene present in large amounts in a lot of classic sativa strains and accounting for much of the thing growers mean as the « sativa » aroma: fresh, woody, lemon and faintly sweet all at once. It is volatile, lost quickly by hot drying, and terpinolene degrades faster during the cure than the earthier terpenes which dominate indica-leaning lines.
To a seed buyer the word does two jobs. Where a listing names terpinolene among the leading aromas, the line most likely has substantial Haze-era genetics regardless of what the label says. And when the grower are after that profile to survive to the jar, the cure is going to be cool and slow; a fast dry flattens a terpinolene sativa to something that smells of very little and leaves nothing of what the pack described.
Foxtailing (and when it is not a fault)
The habit of some flowers to grow fresh bud clusters on top of existing ones, giving spired, open buds rather than round ones. In the majority of tent-bred lines it is a heat response, typically caused by light that is too close or temperatures too high, and the standard response is to correct the room.
In a good number of sativas, above all Thai and certain Haze lines, it is built in and is going to happen under a perfect room. A first-time sativa grower frequently spends weeks hunting a fault that was never not there, lowering lights and heat only slowing an already slow flower even more. The listing seldom says which type to expect; the lineage generally tells you.
Flowering time
The figure of weeks between the onset of flowering and harvest, which is the one most frequently misread figure on a sativa pack. For photoperiod seed it is counted from the day the light drops to twelve hours, rather than from sowing, so a « fourteen-week » sativa grown after a eight-week vegetative stage is a twenty-two-week plant. Seed companies also give the shorter end of a range, because the longer end moves fewer seed.
Long-flowering plants take everywhere from ten weeks to well over twenty, and the slowest line in the Haze Sativa Seeds range comes in at about 16 weeks after the switch. The catalogue can be filtered by this number, which is a sensible first step if you have a grower on a fixed schedule. A grower who adds four weeks on top of whatever the pack states is rarely disappointed.
Stretch
The burst of upward growth that follows the switch to flowering. Indica-leaning plants add around half their height again; sativas commonly double, and a few landrace types triple. The stretch continues three to five weeks and cannot be halted once it has started, only bent sideways by training.
In tent terms, the stretch figure is a number worth read before choosing when to switch. A sativa switched at sixty centimetres centimetres inside a two-metre tent is at the lamp before week four of flower; one flipped at thirty centimetres centimetres has room. People moving over from indica stock almost always flip far too late the first time, and the consequence is written on the ceiling of the tent.
Landrace
A population of plants adapted over generations to one place by the local growers and growers together, rather than by deliberate selection. Colombian, Thai, Malawian and Mexican stock are the classic sativa examples. A landrace is a spread, rather than a one plant: within a pack the flowering times, flowering times and smells range widely than in a tent-bred hybrid, and this spread is the point of keeping one.
The trap is buying a landrace as a finished product. It carries traits that make sense in an equatorial field, including a frame that no tent can contain and a flowering rhythm tuned to an daylength the majority of growers never offer. « Heirloom » in a listing usually means a landrace that has been reproduced somewhere for some generations, often with a degree of selection for tent conditions; it is closer to manageable but still not uniform. A seller listing « landrace » that does not give a origin point and a generation history is applying the word as a flavour, and the pack should be priced with that in mind.
Sativa-dominant (the label)
A catalogue term and not a botanical one. It usually indicates that more of a hybrid’s lineage were described as sativa according to the breeder who drafted the description, which occasionally signals nothing more than that the flowers are airier or the smell brighter than the same breeder’s indica-labelled releases.
The experience people associate with a word, lively instead of sedating, is driven more by terpene profile and by cannabinoid content than by the sativa fraction, and plenty of « sativa-dominant » hybrids deliver a heavy couch effect and a good number of the opposite lines deliver exactly the opposite. For a grower the label is worth something as a rough guide to growth habit, flowering time and stretch; for a predictor to how it feels it is close to useless without the aroma notes.
Equatorial (the twelve-hour problem)
Refers to lines out of latitudes where daylength barely varies through the year, which means that the plant never develop a sharp reaction to changing days. Such plants often start flowering reluctantly at a conventional twelve-hour light cycle, because twelve hours is, for them, a mild unremarkable day and not a signal.
The working response, handed around among sativa growers over decades, is to shorten the light more: eleven hours, occasionally ten, particularly in the final weeks. It costs a little yield and buys an more clearer end. A listing which says « equatorial » is warning you this in one word, and a grower who takes it as a note on geography misses the instruction inside it.
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