Sativa seeds arrive with more jargon around them than any other kind of cannabis seed, and most of it means a certain thing to a botanist, another to a seed company and a third to the person standing in front of the pack. A failed sativa grow nearly always traces back to a word that was understood in the wrong one of those senses: a flowering time taken as a promise, a “sativa-dominant” label taken as a description of effect, a landrace chosen like it were a modern hybrid. The entries below were put together with the range at https://hazesativaseeds.com to hand as reference, because it leans heavily towards the long-flowering end of the category and that is where the words carry the most weight most; the definitions themselves apply to any sativa seed from any shop. They are given in no particular order, because not one of them is sense on its own without the rest.

Foxtailing

The tendency of some flowers to grow fresh calyx growth on top of old ones, producing spired, open buds rather than round ones. In most indica-leaning strains it is a heat response, typically caused by light that is too close or temperatures too high, and the standard response is to correct the cause.

In many sativas, above all Thai and some Haze hybrids, it is built in and will happen in a perfect room. A new sativa grower frequently wastes weeks hunting a problem that was never not a problem, lowering lights and temperatures only slowing an already slow flower further. The breeder seldom says which type you should expect; the parentage usually does.

Landrace

A population of plants shaped over centuries to one region by the local climate and growers together, rather than by deliberate breeding. Thai, Thai, Malawian and Mexican lines are the classic sativa cases. A landrace is a spread, not a one plant: within a pack the heights, finishing times and aromas range far more than a tent-bred hybrid, and that spread is the whole value of growing one.

The trap is treating a landrace as a modern hybrid. It carries traits that make sense in an equatorial field, including height that no tent can contain and a flowering clock tuned to a equatorial daylength the majority of growers cannot offer. “Heirloom” on a listing generally refers to a landrace that has been reproduced somewhere over some generations, often with a degree of selection for tent conditions; it is nearer to manageable but nonetheless not uniform. A shop listing “landrace” without an collection point and a reproduction count is using the word loosely, and the pack should be priced accordingly.

Haze

Originally a specific family of plants bred in coastal California from Colombian, Thai and Thai landraces, and then preserved and worked in the Netherlands. The Haze runs tall, branches openly, flowers for twelve sixteen weeks and carries a scent of incense, citrus and something sharp that no other line quite has.

In its looser sense “Haze” is whatever hybrid that carries a share of that family, and by now is a great many of the sativa-leaning catalogue. A listing that reads “Haze” and gives no parents could be eighty percent original old family or one small fraction of it, and the flowering time follows the share, not the name. The useful question is never “is it a Haze” but “how much, and through which parent”.

Stretch (the doubling)

The burst of vertical growth which comes after the switch to flowering. Most tent-bred plants gain around half again; sativas routinely double, and a few landrace types go further. The stretch lasts two to five weeks and cannot be stopped after it has started, merely redirected by training.

In tent terms, a stretch figure is a number worth read ahead of choosing when to switch. A sativa switched at sixty centimetres in a two-metre tent is touching the lamp by week four of flower; one flipped at thirty centimetres has room. Growers coming over from indica stock almost always flip far 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 number of weeks between the onset of flowering and maturity, and the single most frequently misread number on a sativa pack. For photoperiod seed it is measured from the day the light is cut to twelve hours, rather than from sowing, so a “fourteen-week” sativa grown with a ordinary vegetative stage is a twenty-two-week plant. Breeders also quote the optimistic end of a range, because the other end sells fewer seed.

Sativa plants run anywhere from ten weeks to well over twenty, and the slowest strain in the Haze Sativa Seeds range is at around 16 weeks from the switch. The catalogue can be filtered by that number, which is a sensible first pass if you have a grower with a tight timetable. A grower who allows four weeks to the figure the pack states is seldom caught out.

Latitude (outdoor sativas)

The one number that decides if a sativa will finish outdoors, and one that no pack states. Equatorial lines require the run of shortening days to continue long enough to let the plant to finish; at northern latitudes the frost arrives before that, and the grower cuts an half-finished plant in late October or else loses it to mould in November. A further to the equator, in a northern hemisphere, the later the season stretches, and Mediterranean and subtropical growers can ripen plants that temperate growers cannot.

The usable reading for a seed pack: an “outdoor” sativa finishing date is given for the breeder’s home latitude, normally somewhere within southern Europe or the western United States, and every degree north of it pushes the date back into the weather. A grower north of about the fiftieth parallel that is after a long-flowering sativa in the garden needs to be shopping for an autoflower or a covered space, and not a longer season.

Terpinolene (the “sativa smell”)

A terpene present in high amounts in a lot of old sativa strains and accounting for much of what growers mean as a “sativa” aroma: green, woody, citrus and slightly floral all at once. It is fragile, driven off easily through fast drying, and it fades more quickly during the cure than the heavier terpenes that dominate most tent stock.

For a seed buyer the word does two jobs. Where a listing lists terpinolene as the leading aromas, the strain probably carries substantial Haze-era genetics whatever the label says. And where the you wants that smell to survive to the jar, the drying has to be cool and cool; a warm drying room turns a terpinolene sativa into a flower that smells of hay and no trace of what the pack described.

Equatorial (the twelve-hour problem)

Describes lines from latitudes where daylength barely changes through the year, and that the plant never evolved a strong response to shortening days. Such lines frequently start flowering reluctantly at a conventional twelve-hour schedule, because twelve hours is, to them, a mild ordinary day rather than a signal.

The working response, handed around between sativa growers for decades, is to cut the light further: eleven hours, occasionally ten, especially during the last weeks. It costs some little yield and gains a more decisive end. A listing which says “equatorial” is telling you about this with one word, and a grower who takes it as a note on origin misses the instruction hidden in it.

Sativa-dominant (the label)

A catalogue term and not a measurable one. It generally means that more of a hybrid’s lineage were described as sativa according to the breeder who wrote the description, which sometimes signals no more than that the flowers are airier or the smell brighter than the that breeder’s other releases.

The experience people connect with the word, clear-headed instead of heavy, is driven far more by terpene chemistry and by THC content than by ancestry, and plenty of “sativa-dominant” releases deliver a flat sleepy effect while a good number of indica-labelled stock do the opposite. For a grower the percentage is worth something as a loose hint to growth habit, flowering time and stretch; for a predictor to how it feels it is next to useless unless accompanied by the aroma notes.