Sativa seeds come with more vocabulary around them than any other kind of cannabis seed, and a good deal of it means one thing to a botanist, another to a seed company and a third to the person standing in front of the listing. The disappointing sativa grow usually goes back to a word that was read in the wrong one of those senses: a flowering time read as a promise, a “sativa-dominant” tag read as a description of effect, 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 reference, because it runs strongly towards the classic end of the spectrum and that is where the vocabulary matter most; the definitions themselves apply to any sativa seed from any shop. They are in no special order, because none of them makes sense on its own without the others.
Flowering time
The figure of weeks from the start of flowering and maturity, and the one most misread number on a sativa pack. With photoperiod seed it is measured from the day the light is cut to twelve hours, not from sowing, so a “fourteen-week” sativa grown with an eight-week vegetative period is a five-month plant. Breeders additionally quote the shorter end of the spread, since the other end moves less seed.
Sativa lines take everywhere from ten weeks to well over twenty, and the longest line in the Haze Sativa Seeds range is at about 16 weeks after the switch. The catalogue can be sorted by this number, which is a sensible first pass if you have a grower on a fixed schedule. A grower who adds four weeks to the figure the pack states is seldom disappointed.
Haze (the family, not the smell)
In its first sense a particular line of plants bred in 1970s California from Mexican, Thai and Thai landraces, and later preserved and worked in the Netherlands. The Haze grows tall, fills out sparsely, flowers for twelve to sixteen weeks and smells of spice, pine and something metallic that no line quite has.
In its second sense “Haze” is any cross that carries some of that family, and by now is most of the sativa-leaning market. A listing that says “Haze” and gives no parents may be eighty percent original old family or one small fraction of it, and the grow character follows the share, not the name. The working question is not “is it a Haze” but “how much, and through which parent”.
Terpinolene
A aromatic compound found in high amounts in many old sativa lines and responsible for most of the thing growers describe as the “sativa” aroma: fresh, woody, lemon and slightly sweet at once. It is volatile, driven off easily through fast drying, and terpinolene fades more quickly during storage than the heavier terpenes which lead most tent lines.
To a seed buyer the name earns two jobs. When a listing names terpinolene as the leading terpene, the line probably has real old-sativa ancestry whatever the percentage claims. And where the you wants that smell to still be there by the jar, the drying has to be cool and slow; a fast drying room flattens a terpinolene sativa into a flower that tastes of very little and leaves nothing of what the pack promised.
Equatorial
Describes lines out of regions where daylength hardly changes across the year, and that the plant does not develop a sharp reaction to shortening days. Such plants often start flowering slowly under a standard twelve-hour schedule, since twelve hours is, to them, an unremarkable day rather than a signal.
The practical fix, handed around among sativa growers for decades, is to cut the light further: eleven hours, occasionally ten, particularly during the final weeks. It costs a yield yield and gains an more clearer finish. A listing which says “equatorial” is warning you this with one word, and a grower who takes it as mere geography has missed the instruction inside it.
Foxtailing (and when it is not a fault)
The tendency of some flowers to push out fresh calyx growth on top of existing ones, producing towered, irregular buds rather than dense ones. In most indica-leaning strains it is a heat response, usually caused by light too close or temperatures too high, and the standard response is to correct the cause.
In a good number of sativas, above all Thai and some Haze lines, it is built in and is going to happen under a flawless room. A new sativa grower often spends weeks hunting a fault that was never a problem, dropping lights and heat and slowing a slow plant further. The listing rarely says which type you should expect; the lineage usually does.
Intersex tendency
The production of male flowers on a female plant, usually late in flower and frequently under stress. Every cannabis population carries a degree of capacity to do; long-flowering lines express it more often, and the reason is a plain one: fourteen weeks of flower is fourteen weeks of opportunity for a light leak, a temperature spike or a late watering that can trigger it off, and an old that has gone beyond its intended finish frequently produces a few late pollen sacs on its own as a last effort to make seed.
None of these makes a sativa strain unstable as a matter of nature; it means the grower’s discipline count for a longer stretch. Light-tight tents, stable temperatures and harvesting when the plant is ready rather than a week after remove most of the risk. A listing that states the breeder screens parents for hermaphrodite traits is saying something more on a long-flowering line than for anything else.
Sativa-dominant
A marketing term rather than a botanical one. The phrase usually indicates that more of a hybrid’s lineage were classed as sativa by the breeder who wrote the description, which occasionally means nothing more than that the buds are longer or the smell sharper than the that breeder’s other lines.
The effect people associate with a word, clear-headed instead of sedating, is governed far more by terpene profile and by THC balance than by the sativa fraction, and plenty of “sativa-dominant” hybrids produce a flat sleepy result while plenty of the opposite stock deliver exactly the reverse. For a buyer the label is worth something as a rough guide to growth habit, flowering time and stretch; as a predictor to effect it is next to useless without the aroma description.
Landrace
A population of plants shaped through generations to one place by local climate and climate alike, and not by modern breeding. Colombian, Thai, Malawian and Mexican lines are the classic sativa examples. A landrace is a spread, not a one plant: within a pack the flowering times, finishing times and aromas range widely than in any tent-bred line, and this spread is the whole value of growing one.
The mistake is treating a landrace like a modern hybrid. It brings habits that made sense in an open field, including height that no tent can hold and a flowering clock tuned to a daylength most growers cannot provide. “Heirloom” in a listing generally refers to a landrace that has been grown out away from its origin for some generations, often with a degree of selection for indoor life; it is closer to usable but still far from uniform. A shop listing “landrace” without a collection region and a reproduction count is applying the word as a flavour, and the seeds should be judged with that in mind.
Latitude (outdoor sativas)
The single number that decides if a sativa will finish outdoors, and one that no pack states. Long-flowering lines need the autumn days to go on late enough to let the plant finish; at high latitudes the frost comes first, and the grower cuts a half-finished plant in the end of October or loses it rot in November. The closer to the equator, within a northern hemisphere, the longer the season stretches, and coastal or subtropical gardens can ripen plants that temperate gardens cannot.
The usable reading of a seed listing: an “outdoor” sativa finishing date is given for the breeder’s home latitude, usually a point within southern Europe or the western United States, and every degree north of that moves the date back towards the weather. A grower north of about the fiftieth parallel who is after a true sativa outdoors needs to be shopping for an autoflower or else a covered space, not a better summer.
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