Sativa seeds arrive with more vocabulary around them than any other kind of cannabis seed, and most of it means a certain thing to a botanist, another 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 sense: a flowering time read as a fixed number, a “sativa-dominant” label read as a description of character, a landrace bought like it were a modern hybrid. The entries below are written with the range at https://hazesativaseeds.com to hand as the concrete examples, because it leans heavily towards the classic end of the category and that is where the words carry the most weight most; the meanings themselves hold to any sativa seed from any shop. They are in no particular order, since not one of them makes sense without the rest.
Flowering time (and what it is counted from)
The number of weeks from the onset of flowering and maturity, and the one most misread figure on a sativa pack. For photoperiod seed it is counted from the day the light drops to twelve hours, rather than from germination, so a “fourteen-week” sativa started after an ordinary vegetative stage is a twenty-two-week plant. Breeders additionally give the optimistic end of a range, because the other end sells less seed.
Long-flowering plants take everywhere from ten weeks to more than twenty, and the longest line in the Haze Sativa Seeds range is at about 16 weeks after the flip. The catalogue can be sorted by this figure, which is the reasonable first pass for a grower with a tight schedule. A grower who allows four weeks on top of the figure the pack says is seldom disappointed.
Hermaphroditism in long-flowering lines
The appearance of male flowers on a female plant, typically late in flower and frequently under stress. Every cannabis line carries some capacity for do; long-flowering plants express it more often, for a simple reason: fourteen weeks of flower is sixteen weeks of opportunity for a light leak, a temperature spike or a missed watering to trigger it off, and an old that has waited beyond its natural end frequently throws a few desperate pollen sacs on its own as a last attempt to set seed.
Not one of this means a sativa line weak by course; it makes the room’s consistency count over a longer stretch. A sealed tents, stable temperatures and cutting when the plant is ready rather than a week later remove the greater part of the risk. A listing which states a breeder screens parents for hermaphrodite traits is worth more for a sativa than for anything else.
Foxtailing (and when it is not a fault)
The habit of some flowers to grow new calyx clusters on top of existing ones, producing towered, open buds instead of round ones. In most tent-bred lines it is a stress symptom, usually caused by light that is too close or a room that is too high, and the advice is to correct the room.
In a good number of sativas, especially Thai and certain Haze lines, it is genetic and is going to happen under a perfect room. A new sativa grower frequently spends weeks hunting a fault that is a problem, dropping lights and temperatures and delaying an already slow plant even more. The breeder rarely warns which type to expect; the lineage generally does.
Landrace versus heirloom
A population of plants shaped through generations to a particular place by local growers and climate together, rather than by modern selection. Colombian, Thai, Malawian and Oaxacan stock are the classic sativa cases. A landrace is a spread, rather than a one plant: within a pack the flowering times, finishing times and smells spread far more than a tent-bred hybrid, and that spread 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, including a frame that no tent can hold and a flowering rhythm set to a daylength the majority of growers cannot provide. “Heirloom” on a listing generally means a landrace that has been reproduced away from its origin over a number of generations, typically with light selection towards tent conditions; it is nearer to manageable but nonetheless not a hybrid. A seller offering “landrace” that does not give a collection region and a reproduction history is using the word as a flavour, and the pack should be priced with that in mind.
Haze (the family, not the smell)
Originally a specific line of plants bred in coastal California from Mexican, Colombian and South Indian landraces, and later preserved and refined in the Netherlands. The Haze grows tall, fills out openly, takes for twelve sixteen weeks and smells of incense, citrus and a note metallic that no other line quite reproduces.
In its looser sense “Haze” is whatever cross that contains a share of that family, which today is most of the sativa-leaning catalogue. A listing that says “Haze” and gives no parents may be mostly percent the old family or a small fraction of it, and the flowering character tracks the share, not the name. The working question is never “is it a Haze” but “how much, and via which parent”.
Terpinolene
A terpene found in high amounts in many classic sativa lines and accounting for most of the thing people describe as the “sativa” aroma: green, piney, citrus and faintly sweet at once. It is volatile, lost quickly through hot drying, and terpinolene fades faster in the cure than the earthier terpenes that lead most tent lines.
For a seed buyer the name does two jobs. When a listing lists terpinolene among the leading terpene, the line most likely carries substantial Haze-era ancestry regardless of what the percentage says. And when the grower are after that profile to survive to the jar, the cure has to be cool and cool; a fast drying room flattens a terpinolene sativa into a flower that smells of hay and leaves no trace of what the pack promised.
Latitude
The one number that decides if a sativa can ripen outdoors, and one that no pack states. Long-flowering lines require a autumn days to go on long enough for the plant finish; in high latitudes the frost arrives first, and the grower cuts a unripe plant in the end of October or loses it to mould in November. The further to the equator, in a northern hemisphere, the later the season stretches, and coastal and subtropical gardens are able to ripen plants that temperate growers cannot.
The practical reading for a seed listing: an “outdoor” line harvest month is stated for the breeder’s home latitude, usually a point in southern Europe or the western United States, and each step north of that moves the date back into the frost. A grower above about the fiftieth parallel who is after a long-flowering sativa outdoors is looking for a sativa autoflower or else a greenhouse, not a longer season.
Stretch
The burst of upward growth which comes after the switch to flowering. Most tent-bred plants gain half their height again; sativas routinely double, and some landrace lines triple. The stretch lasts two to five weeks and will not be stopped once it begins, only redirected by training.
In tent terms, the stretch multiplier is the fact to read before choosing when to switch. A sativa flipped at sixty centimetres inside a standard tent is at the lamp before week four of flower; one switched at thirty centimetres centimetres has room. Growers coming from indica stock almost always flip far too late the first time, and the consequence is written on the ceiling of the tent.
Equatorial (the twelve-hour problem)
Describes lines from latitudes in which daylength barely varies through the year, and where the plant does not develop a strong response to shortening days. Such lines frequently flower slowly at a standard twelve-hour light cycle, because twelve hours is, to them, a mild ordinary day and not a signal.
The working response, passed down among sativa growers for decades, is to shorten the light more: eleven hours, sometimes ten, especially in the last weeks. It loses a yield yield and buys a more decisive end. A listing that uses “equatorial” is warning you this with one word, and a grower who reads it as a note on geography misses the instruction inside it.
Sativa-dominant
A marketing category and not a botanical one. It generally indicates that the larger share of a hybrid’s parents were described as sativa by whoever wrote the description, which sometimes means nothing more than that the buds are airier or the aroma brighter than the that breeder’s indica-labelled releases.
The effect people connect with a word, clear-headed instead of heavy, is driven more by terpene profile and by THC balance than it is by ancestry, and plenty of “sativa-dominant” releases produce a heavy couch result and a good number of indica-labelled lines deliver the reverse. To a buyer the label is worth something for a loose hint to growth habit, flowering time and stretch; as a guide to effect it is close to useless unless accompanied by the terpene notes.