Sativa seeds come with more vocabulary attached than any other kind of cannabis seed, and a good deal of it means 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 usually goes back to a word that was read in the wrong one of those senses: a flowering time read as a promise, a „sativa-dominant“ tag taken 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 open for reference, because it leans strongly towards the long-flowering end of the category where the words carry the most weight most; the meanings themselves apply to any sativa seed from any seller. They are in no particular order, since not one of them is sense on its own without the rest.

Stretch (the doubling)

The burst of vertical growth which comes after the change to flowering. Indica-leaning plants add half again; sativas commonly double, and some landrace lines go further. The stretch continues three to five weeks and will not be stopped once it has started, only redirected by training.

In practical terms, a stretch multiplier is the fact to read ahead of choosing when to flip. A sativa switched at sixty centimetres in a standard tent is at the lamp by week four of flower; one flipped at thirty centimetres has room. People coming over from indica strains nearly always flip far too late the first time, and the lesson is visible on the ceiling of the tent.

Haze (the family, not the smell)

Originally a particular family of plants put together in coastal California from Mexican, Colombian and Thai landraces, and then kept and worked in the Netherlands. The Haze grows tall, branches openly, flowers for twelve sixteen weeks and carries a scent of incense, citrus and a note metallic that no line quite reproduces.

In its looser sense „Haze“ is whatever hybrid that contains a share of that family, which by now is most of the sativa-leaning catalogue. A listing which reads „Haze“ without parents may be mostly percent original old family or a sixteenth of it, and the flowering time follows the fraction, not the name. The working question is not „is it a Haze“ but „how much, and via which parent“.

Hermaphroditism in long-flowering lines

The appearance of pollen-bearing flowers on a female plant, usually late in flower and frequently in response to stress. Almost every cannabis population carries some tendency for do; long-flowering lines show it more often, and the reason is one plain reason: fourteen weeks of flower is sixteen weeks of opportunity for a light leak, a temperature spike or a missed watering to trigger it going, and an old plant has waited beyond its intended finish frequently produces a few late pollen flowers on its own as a last effort to set seed.

None of these makes a sativa line unstable by course; it makes the grower’s consistency count over longer. Light-tight room, steady temperatures and cutting when the plant is done and not two weeks later remove most of the problem. A listing that mentions a breeder tests parents for hermaphrodite traits is saying something more on a sativa than for anything other category.

Flowering time

The number of weeks between the onset of flowering and harvest, and the one most misread figure on a sativa pack. With photoperiod seed it is measured from the day the light drops to twelve hours, rather than from sowing, so a „fourteen-week“ sativa started after an eight-week vegetative period is a five-month plant. Breeders also quote the shorter end of a range, because the other end moves less seed.

Sativa lines run 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 sorted by that number, which is the sensible first step if you have a room on a tight schedule. A grower who allows four weeks to the figure the pack states is rarely caught out.

Sativa-dominant

A catalogue term rather than a measurable one. It generally means that the larger share of a hybrid’s parents were described as sativa by the breeder who drafted the listing, which sometimes signals nothing more than that the flowers are airier or the smell brighter than the same breeder’s other lines.

The effect people associate with the word, lively rather than heavy, is governed far more by terpene profile and by THC content than it is by ancestry, and plenty of „sativa-dominant“ hybrids produce a flat sleepy result and plenty of indica-labelled stock deliver the opposite. For a grower the label is useful for a rough hint to growth habit, flowering time and stretch; for a predictor to effect it is close to worthless without the terpene description.

Foxtailing (and when it is not a fault)

The habit of certain flowers to grow new calyx growth on top of existing ones, giving spired, irregular buds rather than round ones. In the majority of indica-leaning strains it is a heat response, typically caused by light too close or a room too high, and the standard response is to fix the cause.

In a good number of sativas, especially Southeast Asian and certain Haze hybrids, it is built in and will happen under a flawless room. A new sativa grower frequently wastes weeks chasing a fault that is there, dropping lights and heat and slowing a long flower even more. The breeder seldom warns which type to expect; the lineage generally tells you.

Landrace versus heirloom

A population of plants shaped over generations to one region by the local growers and climate together, and not by deliberate breeding. Colombian, Colombian, Congolese and Mexican stock are the classic sativa cases. A landrace is variable, rather than a single plant: within a pack the heights, finishing times and smells range far more than in any tent-bred line, and this spread is the whole value of keeping one.

The mistake is buying a landrace like a finished product. It brings habits that made sense in an open field, including height that no tent can hold and a flowering rhythm tuned to an equatorial daylength most growers never offer. „Heirloom“ in a listing usually means a landrace that has been grown out somewhere over some generations, often with a degree of selection towards tent conditions; it is nearer to usable but still far from a hybrid. A shop offering „landrace“ that does not give an origin point and a reproduction history is applying the word as a flavour, and the pack should be judged with that in mind.

Latitude (outdoor sativas)

The single number that determines if a sativa can ripen outdoors, and one no pack states. Long-flowering lines require the autumn days to continue late enough for the plant ripen; at northern latitudes the frost comes before that, and the grower cuts an unripe plant in the end of October or else watches it to mould in November. The further to the equator, within the northern hemisphere, the longer the season runs, and coastal and low-latitude gardens are able to finish plants that northern growers never will.

The usable rule for a seed pack: an „outdoor“ line finishing date is stated for the breeder’s home latitude, usually somewhere in temperate Europe or the western United States, and every step further north of that pushes the finish later into the frost. A grower north of about the fiftieth parallel who wants a true sativa outdoors needs to be looking for an autoflower or a covered space, not a longer season.

Terpinolene

A aromatic compound found in high amounts in a lot of old sativa strains and accounting for most of what people describe as a „sativa“ smell: fresh, woody, lemon and slightly floral all at once. It is fragile, driven off quickly through hot drying, and terpinolene degrades more quickly in storage than the heavier terpenes which lead most tent lines.

To a seed buyer the name does two things. Where a listing names terpinolene as the lead terpene, the line most likely carries substantial old-sativa ancestry whatever the label claims. And where the you are after that smell to still be there to the jar, the drying has to be slow and slow; a warm drying room turns a terpinolene line into something that tastes of hay and no trace of what the pack promised.

Equatorial (the twelve-hour problem)

Describes plants from latitudes where daylength barely changes across the year, and where the plant does not develop a strong response to changing days. Such plants often flower slowly under a conventional twelve-hour light cycle, since twelve hours is, to them, an ordinary day and not a signal.

The working response, passed around among sativa growers for decades, is to cut the light further: eleven hours, occasionally ten, particularly during the final weeks. It loses some yield yield and buys an earlier clearer finish. A listing that says „equatorial“ is telling you this in one word, and a grower that takes it as mere origin misses the instruction hidden in it.