Sativa seeds arrive with more vocabulary attached 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 something different again to the grower standing in front of the listing. The failed sativa grow usually goes back to a word that was understood in the wrong one of those senses: a flowering time read as a fixed number, a “sativa-dominant” tag read as a statement of character, a landrace chosen like it were a tent-bred hybrid. The entries below were written with the range at https://hazesativaseeds.com to hand as the concrete examples, since it leans heavily to the classic end of the spectrum and that is where the vocabulary matter most; the definitions though hold to any sativa seed from any seller. They are given in no particular order, because none of them is usable without the rest.

Intersex tendency

The appearance of pollen-bearing flowers on a female plant, usually towards the end in flower and often in response to stress. Every cannabis population carries some tendency to do; sativa plants express it more often, and the reason is a simple reason: sixteen weeks of flower is sixteen weeks of exposure for a light leak, a heat spike or a missed watering that can set it going, and an plant plant has already waited beyond its natural finish often produces a few desperate pollen sacs on its own as a final effort to set seed.

Not one of these means a sativa line unstable by nature; it makes the grower’s discipline count for longer. Light-tight room, steady temperatures and cutting when the plant is ready and not two week later remove the greater part of the risk. A listing which mentions the breeder screens parents for intersex traits is saying something more for a sativa than on anything other category.

Stretch (the doubling)

The burst of vertical growth which comes after the change to flowering. Most tent-bred plants add around half their height again; sativas commonly double, and some equatorial lines triple. The stretch continues three to five weeks and cannot be stopped once it has started, merely bent sideways by training.

In practical terms, a stretch multiplier is the number worth reading before choosing when to switch. A sativa switched at sixty centimetres centimetres in a two-metre tent is touching the lamp before week four of flower; one flipped at thirty centimetres centimetres has room. Growers coming over from indica stock almost always switch too late the first time, and the consequence is written on the ceiling of the tent.

Flowering time (and what it is counted from)

The figure of weeks between the onset of flowering and maturity, and the one most misread figure on a sativa pack. For photoperiod seed it is measured from the day the light drops to twelve hours, rather than from sowing, so a “fourteen-week” sativa started with an eight-week vegetative period is a five-month plant. Breeders additionally quote the optimistic end of a spread, since the other end moves less seed.

Sativa plants take everywhere from ten weeks to more than twenty, and the slowest line in the Haze Sativa Seeds range comes in at around 16 weeks after the switch. The catalogue can be filtered by that figure, which is a reasonable first step if you have a room with a tight timetable. A grower who allows four weeks on top of the figure the pack says is rarely disappointed.

Terpinolene

A aromatic compound present in large amounts in a lot of old sativa strains and responsible for much of what people describe as a “sativa” smell: green, piney, lemon and slightly sweet all at once. It is fragile, driven off quickly through hot drying, and it degrades faster during the cure than the earthier terpenes which lead most tent stock.

For a seed buyer the word does two jobs. Where a listing names terpinolene as the lead terpene, the line most likely carries substantial Haze-era ancestry regardless of what the label says. And where the grower wants that profile to still be there to the jar, the drying has to be slow and slow; a warm dry flattens a terpinolene line to something that tastes of hay and leaves no trace of what the pack promised.

Latitude

The single figure that determines if a sativa can ripen outdoors, and one no pack states. Equatorial lines need a run of shortening days to continue long enough for the plant to ripen; at northern latitudes the frost arrives first, and the grower harvests an unripe plant in the end of October or watches it rot in November. The further south, within the northern hemisphere, the longer the window runs, and coastal or subtropical gardens can finish lines that northern growers never will.

The usable reading of a seed listing: an “outdoor” line harvest date is stated for the breeder’s home latitude, usually somewhere within temperate Europe or the west coast of the United States, and each degree north of it pushes the date back towards the weather. A grower above about the fiftieth parallel who wants a long-flowering sativa outdoors is looking for a sativa autoflower or else a covered space, not a better summer.

Equatorial (the twelve-hour problem)

Refers to plants out of regions where daylength barely changes through the year, which means where the plant does not develop a sharp response to changing days. These lines frequently flower slowly under a standard twelve-hour light cycle, because twelve hours is, for them, an ordinary day and not a signal.

The working fix, handed down among sativa growers for decades, is to cut the light further: eleven hours, occasionally ten, especially during the last weeks. It costs some yield yield and gains a more decisive end. A listing that uses “equatorial” is warning you this in one word, and a grower who reads it as a note on geography has missed the point inside it.

Landrace

A population of plants adapted over centuries to one place by local growers and growers alike, and not by modern selection. Colombian, Thai, Malawian and Mexican lines are the sativa cases. A landrace is variable, not a single plant: inside a pack the heights, finishing times and aromas range widely than in any tent-bred hybrid, and this variation is the whole value of growing one.

The trap is treating a landrace as a finished product. It carries traits that make sense in an equatorial field, including a frame that no tent can contain and a flowering clock tuned to a equatorial daylength the majority of growers never provide. “Heirloom” on a listing generally means a landrace that has been grown out somewhere over some generations, often with light selection for indoor conditions; it is nearer to usable but nonetheless far from uniform. A shop listing “landrace” without an origin region and a reproduction history is applying the word loosely, and the pack should be judged accordingly.

Haze

Originally a specific family of plants bred in coastal California from Mexican, Thai and Thai landraces, and then kept and worked in the Netherlands. A true Haze runs tall, branches sparsely, flowers for twelve to to sixteen weeks and smells of spice, pine and a note metallic that no other line exactly has.

In its second sense “Haze” is any cross that contains some of that family, which by now is most of the sativa-leaning market. A listing which reads “Haze” and gives no parents may be mostly percent original old family or a sixteenth of it, and the grow character follows the fraction, not the name. The working question is never “is it a Haze” but “how much, and via which parent”.

Sativa-dominant (the label)

The catalogue term and not a measurable one. It usually means that the larger share of a hybrid’s lineage were classed as sativa by the breeder who wrote the description, and sometimes means nothing more than a certain the buds are airier or the aroma brighter than the that breeder’s indica-labelled releases.

The effect people associate with a word, lively instead of heavy, is driven far more by terpene profile and by cannabinoid content than by ancestry, and plenty of “sativa-dominant” releases deliver a flat sleepy effect while plenty of the opposite stock do exactly the reverse. To a buyer the percentage is useful as a loose hint to growth habit, flowering time and stretch; as a predictor to how it feels it is next to worthless without the aroma notes.