Sativa seeds come with more jargon around them than any other kind of cannabis seed, and a good deal 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 listing. A disappointing sativa grow nearly always goes back to a word that was read in the wrong one of those senses: a flowering time taken as a fixed number, a “sativa-dominant” tag read as a statement of effect, a landrace bought like it were a tent-bred hybrid. The entries below are written with the range at https://hazesativaseeds.com open for the concrete examples, because it runs heavily to the classic end of the spectrum where the vocabulary carry the most weight most; the definitions themselves apply to any sativa seed from any seller. They are given in no special order, because none of them makes sense on its own without the others.

Flowering time

The number of weeks from the onset of flowering and harvest, which is the one most frequently misread number on a sativa pack. For photoperiod seed it is measured from the day the light drops to twelve hours, not from germination, so a “fourteen-week” sativa grown after an ordinary vegetative stage is a five-month plant. Breeders also give the optimistic end of a range, since the longer end moves fewer seed.

Sativa plants take anywhere from ten weeks to well over twenty, and the longest strain in the Haze Sativa Seeds range comes in at about 16 weeks after the flip. The catalogue can be filtered by that number, which is a sensible first pass for a room with a tight schedule. A grower who adds four weeks on top of the figure the pack states is seldom caught out.

Sativa-dominant

The catalogue term and not a measurable one. The phrase usually indicates that the larger share of a hybrid’s parents are described as sativa by the breeder who wrote the listing, and sometimes means nothing more than that the buds are longer or the aroma sharper than the that breeder’s other lines.

The experience people connect with a word, clear-headed rather than heavy, is governed more by terpene profile and by cannabinoid content than by the sativa fraction, and plenty of “sativa-dominant” releases produce a heavy sleepy result while a good number of indica-labelled lines deliver the reverse. For a grower 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 worthless unless accompanied by the aroma description.

Intersex tendency

The appearance of pollen-bearing flowers on a female plant, usually late in flower and frequently in response to stress. Almost every cannabis population has some capacity to do; long-flowering plants show it more, and the reason is a plain one: fourteen weeks of flower is fourteen weeks of exposure for a light leak, a temperature spike or a late watering that can trigger it going, and a old that has gone past its natural end often produces a few late pollen flowers on its own in a final attempt to make seed.

None of this makes a sativa strain weak as a matter of nature; it means the room’s discipline matter over longer. A sealed room, stable temperatures and harvesting when the plant is ready and not two week later remove most of the risk. A listing which mentions a breeder screens parents for intersex tendency is worth more for a long-flowering line than for any other category.

Foxtailing

The habit of certain flowers to push out fresh calyx clusters on top of existing ones, giving spired, open buds instead of dense ones. In the majority of indica-leaning strains it is a stress response, usually caused by light that is too close or temperatures that is too high, and the advice is to fix the cause.

In many sativas, especially Southeast Asian and some Haze hybrids, it is genetic and will occur under a perfect room. A first-time sativa grower often wastes weeks chasing a problem that was never there, dropping lights and heat and delaying a long flower even more. The listing rarely warns which kind to expect; the lineage usually tells you.

Haze (the family, not the smell)

Originally a particular line of plants put together in 1970s California from Colombian, Thai and Thai parents, and then preserved and refined in the Netherlands. A true Haze grows tall, fills out openly, flowers for twelve to to sixteen weeks and carries a scent of spice, pine and something metallic that no line exactly has.

In its looser sense “Haze” is whatever hybrid that carries some of that family, and today is a great many of the sativa-leaning catalogue. A listing which reads “Haze” without lineage could be eighty percent original classic family or one 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”.

Equatorial (the twelve-hour problem)

Refers to plants out of regions where daylength hardly varies through the year, and where the plant does not evolved a strong response to shortening days. These plants frequently flower slowly at a standard twelve-hour light cycle, since twelve hours is, for them, an ordinary day rather than a signal.

The practical response, handed down among sativa growers over decades, is to cut the light more: eleven hours, occasionally ten, especially during the last weeks. It costs a yield yield and buys a earlier decisive finish. A listing that says “equatorial” is telling you this in one word, and a grower who takes it as mere origin misses the instruction inside it.

Terpinolene (the “sativa smell”)

A aromatic compound found in high amounts in many old sativa strains and responsible for most of what people mean as the “sativa” aroma: green, piney, citrus and slightly floral at once. It is fragile, lost easily through fast drying, and it degrades faster in storage than the heavier terpenes that dominate indica-leaning lines.

For a seed buyer the word does two jobs. Where a listing names terpinolene among the lead terpene, the strain probably carries real old-sativa genetics whatever the percentage says. And where the you are after that profile to still be there by the jar, the cure is going to be slow and slow; a warm drying room flattens a terpinolene sativa into a flower that smells of hay and leaves nothing of what the pack described.

Stretch

The surge of vertical growth which follows the change to flowering. Indica-leaning plants gain half again; sativas routinely double, and a few equatorial types triple. The stretch continues three to five weeks and will not be stopped after it begins, merely bent sideways by training.

In tent terms, the stretch figure is a fact worth read before deciding when to switch. A sativa switched at sixty centimetres inside a two-metre tent is at the lamp before week four of flower; one flipped at thirty centimetres has room. Growers moving over from indica strains nearly always flip too late the first time, and the consequence is visible on the ceiling of the tent.

Landrace versus heirloom

A population of plants shaped through generations to one place by the local climate and growers alike, rather than by modern breeding. Colombian, Colombian, Malawian and Oaxacan lines are the sativa examples. A landrace is a spread, not a single plant: inside a pack the heights, finishing times and aromas range far more than in a tent-bred line, and that spread is the whole value of keeping one.

The mistake is treating a landrace like a finished hybrid. It brings traits that make sense in an equatorial field, such as height no tent can hold and a flowering clock set to a daylength most growers cannot provide. “Heirloom” in a listing usually refers to a landrace that has been grown out somewhere for some generations, often with a degree of selection for indoor life; it is closer to manageable but still far from uniform. A shop listing “landrace” that does not give a collection point and a reproduction history is applying the word loosely, and the pack should be judged accordingly.

Latitude (outdoor sativas)

The one number that determines if a sativa can finish outdoors, and a number no pack prints. Equatorial plants need the autumn days to continue late enough for the plant to ripen; in northern latitudes the frost arrives before that, and the grower cuts a unripe plant in the end of October or else watches it to mould in November. A closer south, within the northern hemisphere, the longer the season stretches, and Mediterranean or subtropical growers can finish plants that temperate growers never will.

The practical rule of a seed listing: an “outdoor” sativa finishing date is given for the breeder’s own latitude, normally a point in southern Europe or the west coast of the United States, and each degree north of that pushes the date back towards the weather. A grower above about the fiftieth parallel who is after a true sativa in the garden is looking for an autoflower or a greenhouse, not a better season.