Sativa seeds come with more jargon attached than any other kind of cannabis seed, and a good deal of it means a certain thing to a botanist, another to a seed company and something different again to the grower standing in front of the pack. The disappointing sativa grow usually traces back to a word that was understood in the wrong sense: a flowering time read as a promise, a “sativa-dominant” tag read as a description of character, a landrace chosen like it were a tent-bred hybrid. The entries below were put together with the range at https://hazesativaseeds.com open for the concrete examples, since it leans strongly to the long-flowering end of the spectrum and that is where the words matter most; the meanings themselves hold to any sativa seed from any seller. They are given in no particular order, since none of them is usable without the rest.
Latitude
The one figure that determines whether a sativa will finish outdoors, and a number that no pack prints. Equatorial plants need a autumn days to continue long enough to let the plant to finish; in high latitudes the frost comes before that, and the grower harvests a half-finished plant in the end of October or loses it to mould in November. A further south, within the northern hemisphere, the longer the season stretches, and Mediterranean and subtropical growers can ripen lines that temperate growers never will.
The practical rule for a seed pack: an “outdoor” line harvest date is given for the breeder’s own latitude, normally a point in southern Europe or the western United States, and each degree north of that pushes the date later into the weather. A grower north of about the fiftieth parallel that wants a long-flowering sativa in the garden needs to be looking for an autoflower or a covered space, not a better season.
Flowering time
The figure of weeks between the onset of flowering and maturity, which is the single most misread figure on a sativa pack. With 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 eight-week vegetative period is a five-month plant. Seed companies additionally give the shorter end of the range, because the other end moves less seed.
Sativa plants run everywhere from ten weeks to well over twenty, and the longest strain in the Haze Sativa Seeds range comes in at about 16 weeks from the switch. The catalogue can be sorted by this figure, which is a sensible first step if you have a room on a tight schedule. A grower who adds four weeks to whatever the pack says is seldom disappointed.
Equatorial (the twelve-hour problem)
Refers to plants out of regions in which daylength barely varies across the year, which means that the plant does not develop a strong response to changing days. Such plants frequently flower reluctantly under a conventional twelve-hour light cycle, because twelve hours is, to them, a mild unremarkable day and not a signal.
The practical response, handed around between sativa growers over decades, is to cut the light further: eleven hours, sometimes ten, especially during the final weeks. It loses a little yield and buys an more clearer end. A listing that uses “equatorial” is telling you about this in one word, and a grower that reads it as mere origin misses the point inside it.
Foxtailing
The tendency of certain flowers to grow fresh bud clusters on top of existing ones, producing towered, irregular buds rather than dense ones. In the majority of indica-leaning lines it is a stress symptom, usually caused by light that is too close or a room too high, and the advice is to correct the cause.
In many sativas, above all Thai and certain Haze hybrids, it is genetic and will occur in a flawless room. A first-time sativa grower frequently spends a month hunting a fault that is not a problem, dropping lights and heat and slowing a long flower further. The breeder rarely says which kind you should expect; the lineage generally does.
Hermaphroditism in long-flowering lines
The production of pollen-bearing flowers on a female plant, typically late in flower and frequently in response to stress. Every cannabis population carries a degree of capacity to it; sativa lines express it more, for one plain reason: fourteen weeks of flower is fourteen weeks of exposure for a light leak, a temperature spike or a late watering to set it going, and an old that has waited beyond its intended end frequently throws a few late male flowers on its own as a last attempt to set seed.
Not one of these makes a sativa strain weak by nature; it means the room’s discipline count for a longer stretch. Light-tight tents, stable temperatures and cutting when the plant is done and not a weeks later remove the greater part of the risk. A listing which mentions the breeder screens parents for intersex tendency is saying something worth hearing on a sativa than for anything else.
Haze (the family, not the smell)
Originally a specific line of plants bred in coastal California from Mexican, Colombian and South Indian landraces, and then kept and refined in the Netherlands. The Haze grows tall, branches sparsely, flowers for twelve to sixteen weeks and smells of spice, pine and a note metallic that no other line exactly reproduces.
In its second sense “Haze” is any hybrid that contains a share of that family, which today is most of the sativa-leaning market. A listing which says “Haze” and gives no parents could be mostly percent original old family or one small fraction of it, and the grow character follows the share, not the name. The useful question is not “is it a Haze” but “how much, and through which parent”.
Terpinolene (the “sativa smell”)
A terpene present in high proportion in many classic sativa lines and responsible for most of the thing growers mean as the “sativa” smell: fresh, woody, citrus and faintly sweet at once. It is volatile, driven off quickly through hot drying, and terpinolene degrades faster in storage than the earthier terpenes which lead indica-leaning stock.
To a seed buyer the name does two jobs. When a listing names terpinolene among the leading terpene, the strain probably has substantial old-sativa ancestry regardless of what the label says. And where the you are after that smell to still be there to the jar, the drying is going to be slow and cool; a fast dry flattens a terpinolene sativa to a flower that tastes of very little and leaves no trace of what the pack promised.
Stretch
The burst of upward growth which comes after the change to flowering. Most tent-bred plants gain half again; sativas routinely double, and a few landrace lines go further. The stretch continues two to five weeks and cannot be stopped once it begins, only bent sideways by training.
In tent terms, a stretch multiplier is a number to reading ahead of choosing when to flip. A sativa flipped at sixty centimetres in a standard tent is at the lamp before week four of flower; one flipped at thirty centimetres centimetres has room. People moving from indica strains almost always switch too late the first time, and the lesson is visible on the ceiling of the tent.
Sativa-dominant
The catalogue term and not a measurable one. It usually indicates that the larger share of a hybrid’s parents were classed as sativa by the breeder who wrote the description, which occasionally means nothing more than a certain the buds are longer or the aroma brighter than the that breeder’s other lines.
The experience people associate with a word, clear-headed rather than heavy, is governed far more by terpene chemistry and by THC content than by ancestry, and plenty of “sativa-dominant” hybrids deliver a heavy couch effect while plenty of indica-labelled stock deliver the opposite. To a grower the percentage is worth something as a loose hint to growth habit, flowering time and stretch; as a predictor to effect it is next to worthless unless accompanied by the aroma notes.
Landrace versus heirloom
A population of plants shaped through generations to a particular region by the local growers and climate alike, and not by modern selection. Thai, Thai, Malawian and Mexican stock are the classic sativa examples. A landrace is variable, rather than a single plant: inside a pack the heights, finishing times and smells spread widely than in a tent-bred line, and that spread is the point of growing one.
The mistake is treating a landrace as a finished hybrid. It carries habits that made sense in an open field, including a frame that no tent can hold and a flowering rhythm set to a equatorial daylength the majority of growers cannot provide. “Heirloom” on a listing generally refers to a landrace that has been grown out away from its origin over a number of generations, typically with a degree of selection towards tent life; it is nearer to manageable but still far from uniform. A seller listing “landrace” that does not give an origin point and a generation count is using the word as a flavour, and the seeds should be judged accordingly.
