Sativa Seeds, Term by Term

Sativa seeds come with more jargon attached than any other kind of cannabis seed, and most of it means one thing to a botanist, something else to a seed company and something different again to the person trying to make a decision in front of the listing. A failed sativa grow usually goes back to a word that was understood in the wrong sense: a flowering time read as a fixed number, a “sativa-dominant” tag taken as a description of effect, a landrace bought like it were a tent-bred hybrid. The entries below were put together with the range at https://hazesativaseeds.com to hand for the concrete examples, because it runs heavily towards the long-flowering end of the spectrum and that is where the vocabulary matter most; the meanings themselves hold to any sativa seed from any seller. They are given in no special order, because not one of them is sense without the rest.

Stretch (the doubling)

The burst of vertical growth that comes after the switch to flowering. Most tent-bred plants add half their height again; sativas commonly double, and some landrace lines go further. The stretch lasts two to five weeks and cannot be halted once it has started, merely redirected by training.

In practical terms, the stretch multiplier is the number worth reading ahead of choosing when to switch. A sativa flipped at sixty centimetres in a standard tent is at the lamp before week four of flower; one switched at thirty centimetres has room. People moving from indica stock almost always flip far too late the first time, and the lesson is visible on the ceiling of the tent.

Intersex tendency

The appearance of pollen-bearing flowers on a female plant, typically towards the end in flower and frequently under stress. Every cannabis population has some capacity for do; sativa plants express it more often, for one plain one: sixteen weeks of flower is fourteen weeks of exposure for a light leak, a heat spike or a missed watering to set it off, and an plant that has gone beyond its intended end frequently produces a few desperate male sacs on its own as a final attempt to set seed.

Not one of these makes a sativa line weak by course; it makes the room’s discipline matter for a longer stretch. Light-tight room, steady conditions and harvesting when the plant is done and not two week after remove the greater part of the problem. A listing which states a breeder screens parents for intersex traits is worth more for a sativa than on anything other category.

Landrace versus heirloom

A population of plants adapted through centuries to one place by local growers and climate alike, and not by modern breeding. Colombian, Colombian, Malawian and Oaxacan stock are the sativa examples. A landrace is a spread, rather than a single plant: inside a pack the flowering times, finishing times and aromas spread widely than in a tent-bred hybrid, and this variation is the whole value of growing one.

The mistake is treating a landrace like a finished hybrid. It brings traits that made sense in an open field, including a frame that no tent can hold and a flowering rhythm set to a daylength the majority of growers cannot offer. “Heirloom” in a listing generally refers to a landrace that has been reproduced somewhere for a number of generations, typically with light selection for tent life; it is closer to manageable but nonetheless far from uniform. A seller offering “landrace” without a collection point and a generation history is using the word loosely, and the seeds should be priced accordingly.

Foxtailing (and when it is not a fault)

The tendency of some flowers to grow fresh calyx growth on top of existing ones, giving spired, open buds rather than dense ones. In the majority of tent-bred lines it is a heat response, typically from light that is too close or a room too high, and the standard response is to fix the cause.

In many sativas, above all Southeast Asian and some Haze lines, it is genetic and will happen in a flawless room. A new sativa grower often spends weeks hunting a fault that is not there, lowering lights and temperatures and slowing an already slow flower further. The listing seldom warns which type to expect; the lineage generally tells you.

Equatorial (the twelve-hour problem)

Refers to plants out of latitudes in which daylength barely varies across the year, and that the plant does not evolved a strong response to shortening days. Such plants frequently flower reluctantly under a conventional twelve-hour light cycle, since twelve hours is, to them, a mild unremarkable day and not a signal.

The practical fix, passed around among sativa growers over decades, is to cut the light further: eleven hours, occasionally ten, especially during the final weeks. It costs some yield yield and buys an earlier decisive end. A listing that uses “equatorial” is telling you this in one word, and a grower who takes it as mere geography misses the instruction hidden in it.

Sativa-dominant

A marketing category and not a measurable one. The phrase usually means that the larger share of a hybrid’s parents are classed as sativa according to the breeder who drafted the description, which occasionally signals nothing more than that the buds are longer or the smell sharper than the that breeder’s other releases.

The experience people connect with a word, lively rather than heavy, is driven more by terpene profile and the cannabinoid balance than by the sativa fraction, and a good number of “sativa-dominant” hybrids deliver a heavy couch effect and plenty of the opposite stock do exactly the opposite. To a grower the percentage is useful as a rough hint to growth habit, flowering time and stretch; for a predictor to how it feels it is next to useless without the aroma notes.

Flowering time (and what it is counted from)

The figure of weeks between the start of flowering and harvest, which is the one most frequently misunderstood number on a sativa pack. For photoperiod seed it is counted from the day the light is cut to twelve hours, not from sowing, so a “fourteen-week” sativa grown after an eight-week vegetative stage is a twenty-two-week plant. Breeders also give the shorter end of the range, because the longer end moves fewer seed.

Sativa plants take anywhere from ten weeks to well over twenty, and the slowest strain in the Haze Sativa Seeds range comes in at around 16 weeks from the switch. The catalogue can be sorted by that figure, which is a sensible first step if you have a grower with a tight schedule. A grower who adds four weeks to whatever the pack says is rarely caught out.

Haze (the family, not the smell)

In its first sense a specific family of plants bred in coastal California from Mexican, Thai and Thai landraces, and then kept and refined in the Netherlands. A true Haze runs tall, branches openly, flowers for twelve to sixteen weeks and smells of spice, pine and something sharp that no other other line exactly reproduces.

In its second sense “Haze” is any cross which contains some of that family, and today is a great many of the sativa-leaning market. 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 time follows the share, not the name. The useful question is not “is it a Haze” but “how much, and via which parent”.

Latitude (outdoor sativas)

The one figure that decides whether a sativa will ripen outdoors, and a number that no pack states. Equatorial lines need the autumn days to continue late enough for the plant ripen; in high latitudes the frost arrives before that, and the grower harvests a half-finished plant in late October or watches it rot in November. A further to the equator, in the northern hemisphere, the longer the window stretches, and Mediterranean or low-latitude gardens are able to finish lines that northern growers cannot.

The usable reading of a seed pack: an “outdoor” sativa harvest month is given for the breeder’s own latitude, usually a point within southern Europe or the west coast of the United States, and each degree further north of it pushes the date back into the weather. A grower north of about the fiftieth parallel who wants a long-flowering sativa outdoors is shopping for an autoflower or else a greenhouse, not a longer summer.

Terpinolene

A aromatic compound present in high amounts in a lot of old sativa lines and accounting for most of what growers describe as a “sativa” aroma: fresh, piney, lemon and faintly sweet all at once. It is volatile, driven off easily through hot drying, and it degrades more quickly in storage than the heavier terpenes which dominate indica-leaning lines.

For a seed buyer the name earns two things. Where a listing lists terpinolene as the leading aromas, the line probably carries real old-sativa ancestry whatever the label says. And where the you wants that smell to still be there to the jar, the drying has to be slow and cool; a warm drying room flattens a terpinolene sativa to something that tastes of very little and nothing of what the pack described.