Sativa seeds come with more vocabulary around them than any other kind of cannabis seed, and a good deal of it says a certain thing to a botanist, another to a breeder and something different again to the person trying to make a decision in front of the listing. The failed sativa grow nearly always goes back to a word that was read in the wrong sense: a flowering time taken as a fixed number, a “sativa-dominant” label taken as a statement of character, a landrace bought as if it were a modern hybrid. The entries below are written with the range at https://hazesativaseeds.com open for the concrete examples, since it leans heavily towards the classic end of the spectrum where the words matter most; the definitions themselves hold to any sativa seed from any seller. They are given in no particular order, because none of them makes usable on its own without the others.

Flowering time

The figure of weeks between the onset of flowering and maturity, and the single most misunderstood number on a sativa pack. For photoperiod seed it is counted from the day the light is cut to twelve hours, rather than from sowing, so a “fourteen-week” sativa started after an eight-week vegetative stage is a five-month plant. Breeders also quote the optimistic end of a range, because the other end sells fewer seed.

Long-flowering lines take anywhere from ten weeks to well over twenty, and the slowest line in the Haze Sativa Seeds range is at about 16 weeks after the switch. The catalogue can be filtered by this figure, which is the reasonable first step for a room on a tight timetable. A grower who allows four weeks on top of the figure the pack states is rarely caught out.

Terpinolene (the “sativa smell”)

A terpene present in large proportion in many classic sativa strains and accounting for much of the thing growers describe as the “sativa” smell: fresh, woody, lemon and slightly sweet all at once. It is volatile, driven off quickly by fast drying, and terpinolene degrades more quickly in storage than the heavier terpenes that dominate most tent lines.

For a seed buyer the word earns two jobs. When a listing lists terpinolene among the lead aromas, the strain probably has real Haze-era genetics regardless of what the label says. And where the grower wants that profile to survive by the jar, the cure has to be slow and slow; a fast dry turns a terpinolene sativa to something that smells of very little and nothing of what the pack described.

Haze

In its first sense a particular line of plants bred in 1970s California from Mexican, Thai and South Indian landraces, and then kept and refined in the Netherlands. The Haze runs tall, fills out openly, takes for twelve sixteen weeks and smells of spice, pine and something metallic that no line exactly has.

In its looser sense “Haze” is any hybrid that carries some of that family, and by now is most of the sativa-leaning market. A listing that reads “Haze” and gives no parents could be mostly percent original classic family or a small fraction of it, and the flowering character follows the fraction, not the name. The useful question is not “is it a Haze” but “how much, and through which parent”.

Stretch

The surge of upward growth which follows the change to flowering. Indica-leaning plants gain around half again; sativas commonly double, and a few equatorial lines triple. The stretch lasts three to four weeks and will not be stopped after it has started, merely redirected by training.

In practical terms, the stretch figure is the number to reading ahead of choosing when to switch. A sativa flipped at sixty centimetres centimetres inside a two-metre tent is at the lamp before week four of flower; one flipped at thirty centimetres has room. People moving over from indica stock almost always switch far too late the first time, and the lesson is written on the ceiling of the tent.

Foxtailing

The tendency of some flowers to push out fresh bud growth on top of old ones, giving towered, irregular buds rather than dense ones. In the majority of tent-bred lines it is a heat symptom, typically caused by light too close or temperatures too high, and the advice is to correct the room.

In many sativas, above all Thai and some Haze lines, it is built in and is going to happen under a perfect room. A new sativa grower often spends weeks hunting a fault that was never a problem, dropping lights and heat and delaying an already slow flower even more. The breeder rarely says which type you should expect; the lineage usually does.

Intersex tendency

The appearance of male flowers on a female plant, typically late in flower and frequently in response to stress. Almost every cannabis line carries a degree of capacity to it; sativa lines express it more, and the reason is one simple reason: fourteen weeks of flower is fourteen weeks of opportunity for a timer leak, a heat spike or a late watering that can trigger it going, and a old that has waited past its natural end frequently throws a few desperate pollen sacs on its own as a final effort to set seed.

Not one of these means a sativa line weak by nature; it makes the room’s consistency count for a longer stretch. A sealed tents, steady temperatures and harvesting when the plant is done rather than a weeks after remove most of the risk. A listing which mentions the breeder tests parents for hermaphrodite tendency is worth more for a long-flowering line than on anything other category.

Equatorial (the twelve-hour problem)

Describes plants from latitudes in which daylength barely varies across the year, which means that the plant does not evolved a sharp reaction to changing days. Such lines frequently flower reluctantly at a standard twelve-hour light cycle, since twelve hours is, for them, a mild unremarkable day and not a signal.

The practical fix, handed down among sativa growers over decades, is to cut the light further: eleven hours, sometimes ten, particularly in the final weeks. It costs a little yield and buys a earlier decisive end. A listing that says “equatorial” is warning you about this in one word, and a grower who reads it as mere geography misses the point hidden in it.

Sativa-dominant (the label)

The marketing category and not a measurable one. The phrase usually indicates that the larger share of a hybrid’s lineage were described as sativa by the breeder who drafted the description, and occasionally means no more than a certain the buds are longer or the aroma sharper than the same breeder’s indica-labelled lines.

The effect people associate with the word, lively instead of sedating, is governed more by terpene profile and by THC balance than it is by the sativa fraction, and a good number of “sativa-dominant” releases deliver a heavy couch effect while a good number of the opposite lines do the reverse. To a buyer the percentage is useful as a loose guide to growth habit, flowering time and stretch; for a guide to how it feels it is close to useless unless accompanied by the aroma description.

Latitude (outdoor sativas)

The one figure that decides if a sativa can ripen outdoors, and one that no pack prints. Equatorial plants require a run of shortening days to go on late enough for the plant to ripen; at high latitudes the frost arrives before that, and the grower cuts a half-finished plant in late October or else watches it to mould in November. The further to the equator, within a northern hemisphere, the later the season stretches, and Mediterranean or low-latitude growers can ripen lines that temperate gardens cannot.

The usable reading of a seed pack: an “outdoor” line harvest month is stated for the breeder’s own latitude, usually somewhere in temperate Europe or the western United States, and each degree north of that moves the finish later towards the frost. A grower north of about the fiftieth parallel that is after a true sativa in the garden is looking for an autoflower or a covered space, not a longer season.