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, another to a breeder and a third to the grower standing in front of the listing. A disappointing sativa grow usually traces back to a word that was read in the wrong sense: a flowering time taken as a fixed number, a “sativa-dominant” label read as a statement of effect, a landrace chosen as if it were a tent-bred hybrid. The entries below were written with the range at https://hazesativaseeds.com to hand as the concrete examples, because it runs heavily towards the long-flowering end of the spectrum where the words carry the most weight most; the meanings themselves hold to any sativa seed from any seller. They are in no particular order, because not one of them is sense without the others.
Hermaphroditism in long-flowering lines
The production of male flowers on a female plant, typically late in flower and frequently under stress. Every cannabis line has a degree of capacity to it; sativa lines express it more often, 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 to set it off, and an old that has waited beyond its intended finish often produces a few late male flowers on its own as a last effort to make seed.
Not one of this means a sativa strain weak as a matter of nature; it makes the grower’s discipline matter over a longer stretch. Light-tight room, stable temperatures and harvesting when the plant is done and not a week after remove most of the problem. A listing that mentions the breeder screens parents for hermaphrodite traits is saying something worth hearing on a long-flowering line than for any other category.
Sativa-dominant (the label)
The catalogue term rather than a measurable one. The phrase generally means that the larger share of a hybrid’s parents were described as sativa by whoever wrote the description, and occasionally means nothing more than a certain the flowers are airier or the aroma brighter than the same breeder’s other lines.
The effect people associate with a word, clear-headed rather than sedating, is governed far more by terpene chemistry and by THC balance than by ancestry, and plenty of “sativa-dominant” hybrids deliver a heavy sleepy effect while a good number of the opposite stock do exactly the reverse. For a buyer the percentage is worth something for a loose hint to growth habit, flowering time and stretch; as a predictor to how it feels it is close to worthless unless accompanied by the aroma notes.
Stretch (the doubling)
The surge of vertical growth that follows the switch to flowering. Indica-leaning plants gain around half their height again; sativas commonly double, and a few landrace types go further. The stretch continues three to five weeks and cannot be stopped once it has started, merely redirected by training.
In tent terms, a stretch figure is a fact to reading before choosing when to switch. A sativa switched at sixty centimetres inside a standard tent is touching the lamp before week four of flower; one flipped at thirty 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
Refers to plants out of latitudes in which daylength barely varies through the year, and that the plant never develop a sharp reaction to changing days. These plants frequently start flowering reluctantly at a standard twelve-hour schedule, because twelve hours is, to them, a mild unremarkable day rather than a signal.
The practical response, passed around among sativa growers over decades, is to shorten the light more: eleven hours, occasionally ten, particularly during the last weeks. It costs some little yield and gains a more clearer finish. A listing which uses “equatorial” is telling you about this with one word, and a grower that reads it as mere geography has missed the point hidden in it.
Flowering time (and what it is counted from)
The figure of weeks from the start of flowering and maturity, which is the single most frequently misread figure on a sativa pack. With photoperiod seed it is counted from the day the light drops to twelve hours, rather than from sowing, so a “fourteen-week” sativa started after a eight-week vegetative period is a twenty-two-week plant. Breeders additionally quote the shorter end of a spread, since the other end moves less seed.
Sativa plants take anywhere from ten weeks to well over twenty, and the slowest strain in the Haze Sativa Seeds range is at about 16 weeks from the switch. The catalogue can be sorted by that figure, which is the sensible first pass for a room on a tight timetable. A grower who adds four weeks on top of the figure the pack states is rarely disappointed.
Terpinolene
A terpene found in high amounts in many classic sativa lines and accounting for most of what growers describe as a “sativa” smell: fresh, piney, lemon and faintly floral at once. It is fragile, lost easily through fast drying, and it fades more quickly in storage than the earthier terpenes which lead most tent stock.
For a seed buyer the word earns two things. Where a listing names terpinolene among the leading terpene, the line probably has real old-sativa genetics whatever the percentage claims. And when the you are after that smell to survive to the jar, the cure has to be slow and slow; a warm dry flattens a terpinolene sativa to something that tastes of hay and nothing of what the pack promised.
Haze
Originally a specific family of plants put together in 1970s California from Colombian, Colombian and Thai parents, and later preserved and worked in the Netherlands. A true Haze runs tall, branches openly, takes for twelve to to sixteen weeks and carries a scent of incense, pine and something metallic that no other line exactly has.
In its looser sense “Haze” is any cross that carries some of that family, and by now is a great many of the sativa-leaning market. A listing which says “Haze” without parents may be mostly percent original classic family or one small fraction of it, and the grow character tracks the fraction, not the name. The useful question is not “is it a Haze” but “how much, and via which parent”.
Foxtailing (and when it is not a fault)
The tendency of certain flowers to grow fresh bud growth on top of existing ones, producing towered, irregular buds rather than dense ones. In most indica-leaning lines it is a stress response, typically from light that is too close or temperatures that is too high, and the advice is to fix the room.
In many sativas, especially Thai and some Haze hybrids, it is built in and will occur in a flawless room. A first-time sativa grower frequently spends weeks hunting a fault that is a problem, lowering lights and heat only delaying a slow flower even more. The breeder seldom warns which type you should expect; the lineage generally does.
Latitude
The one figure that decides whether a sativa can ripen outdoors, and a number that no pack prints. Equatorial lines need the autumn days to go on long 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. A further south, in the northern hemisphere, the longer the season runs, and coastal and low-latitude growers are able to finish plants that temperate growers never will.
The practical rule for a seed listing: an “outdoor” sativa finishing date is given for the breeder’s own latitude, normally somewhere in southern Europe or the west coast of the United States, and each step north of that pushes the date back towards the weather. A grower above roughly the fiftieth parallel who is after a long-flowering sativa in the garden is shopping for a sativa autoflower or else a greenhouse, not a longer summer.