Sativa seeds arrive with more vocabulary around them than any other category of cannabis seed, and most of it says one thing to a botanist, something else to a breeder and a third to the person trying to make a decision in front of the listing. A disappointing sativa grow usually 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 taken as a statement of character, a landrace bought as if it were a tent-bred hybrid. The entries below were put together with the range at https://hazesativaseeds.com to hand for reference, since it runs strongly towards the long-flowering end of the spectrum and that is where the vocabulary matter most; the meanings though hold to any sativa seed from any shop. They are in no special order, since not one of them makes usable without the others.

Sativa-dominant

The catalogue category and not a botanical one. The phrase usually indicates that the larger share of a hybrid’s parents were classed as sativa according to the breeder who wrote the description, which sometimes means nothing 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 a word, clear-headed instead of heavy, is driven far more by terpene chemistry and the THC content than by ancestry, and a good number of “sativa-dominant” hybrids produce a heavy sleepy effect while plenty of indica-labelled stock deliver exactly the reverse. To a grower the label is useful for a loose guide to growth habit, flowering time and stretch; as a guide to effect it is close to useless unless accompanied by the aroma description.

Hermaphroditism in long-flowering lines

The production of male flowers on a female plant, usually towards the end in flower and often in response to stress. Every cannabis population carries some tendency for do; long-flowering lines show it more often, for a simple one: sixteen weeks of flower is sixteen weeks of exposure for a light leak, a heat spike or a missed watering that can trigger it off, and an plant that has already gone beyond its natural finish often throws a few late male sacs on its own in a final effort to make seed.

Not one of this means a sativa strain weak as a matter of nature; it makes the room’s discipline matter over longer. Light-tight room, steady conditions and cutting the moment the plant is ready and not a week later remove the greater part of the risk. A listing that mentions a breeder tests parents for hermaphrodite tendency is saying something worth hearing for a sativa than for any else.

Stretch

The burst of vertical growth which follows the switch to flowering. Indica-leaning plants gain half their height again; sativas commonly double, and some landrace types triple. The stretch lasts two to five weeks and will not be halted once it has started, merely bent sideways by training.

In practical terms, a stretch multiplier is the number worth reading ahead of choosing when to flip. A sativa flipped at sixty centimetres in a standard tent is at the lamp by week four of flower; one flipped at thirty centimetres centimetres has room. People coming from indica stock almost always flip too late the first time, and the consequence is visible on the ceiling of the tent.

Equatorial

Describes plants from latitudes in which daylength hardly changes across the year, which means where the plant never develop a strong reaction to changing days. These lines frequently flower reluctantly at a conventional twelve-hour light cycle, because twelve hours is, to them, an unremarkable day rather than a signal.

The working fix, handed down among sativa growers over decades, is to cut the light more: eleven hours, occasionally ten, particularly in the last weeks. It costs a little yield and gains a more clearer end. A listing that uses “equatorial” is warning you this with one word, and a grower who reads it as mere geography has missed the instruction inside it.

Terpinolene

A terpene found in large amounts in a lot of old sativa strains and accounting for most of what growers mean as the “sativa” aroma: fresh, piney, citrus and faintly sweet all at once. It is fragile, driven off easily through fast drying, and terpinolene fades more quickly in storage than the earthier terpenes that lead indica-leaning stock.

For a seed buyer the word earns two jobs. When a listing lists terpinolene among the lead terpene, the line probably carries real Haze-era genetics whatever the percentage says. And where the grower are after that profile to still be there to the jar, the drying has to be cool and slow; a fast drying room turns a terpinolene line to a flower that smells of hay and leaves nothing of what the pack described.

Haze (the family, not the smell)

Originally a particular family of plants bred in coastal California from Mexican, Thai and Thai landraces, and then preserved and worked in the Netherlands. A true Haze grows tall, fills out sparsely, takes for twelve to sixteen weeks and carries a scent of incense, pine and a note sharp that no line quite reproduces.

In its second sense “Haze” is whatever hybrid which carries some of that family, which today is a great many of the sativa-leaning catalogue. A listing that reads “Haze” without parents could be mostly percent original old family or one small fraction of it, and the grow time follows the fraction, not the name. The working question is not “is it a Haze” but “how much, and through which parent”.

Foxtailing

The tendency of some flowers to grow new bud clusters on top of existing ones, giving spired, irregular buds instead of round ones. In most indica-leaning strains it is a stress response, typically caused by light that is too close or temperatures that is too high, and the standard response is to correct the cause.

In many sativas, especially Southeast Asian and certain Haze lines, it is built in and is going to occur under a perfect room. A first-time sativa grower frequently spends a month hunting a problem that is not there, lowering lights and temperatures and slowing an already long plant further. The breeder seldom warns which kind you should expect; the parentage generally tells you.

Flowering time (and what it is counted from)

The figure of weeks from the onset of flowering and maturity, which is the single most frequently misread number on a sativa pack. With photoperiod seed it is counted 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. Seed companies also quote the optimistic end of the range, since the longer end moves fewer seed.

Sativa lines run everywhere from ten weeks to well over twenty, and the longest line in the Haze Sativa Seeds range is at about 16 weeks after the flip. The catalogue can be filtered by this number, which is a reasonable first pass if you have a grower with a tight schedule. A grower who adds four weeks on top of the figure the pack states is seldom caught out.

Latitude (outdoor sativas)

The single number that decides if a sativa will finish outdoors, and a number no pack prints. Equatorial lines require a autumn days to go on long enough to let the plant finish; in high latitudes the frost arrives first, and the grower cuts a unripe plant in late October or watches it rot in November. The closer to the equator, in a northern hemisphere, the longer the season runs, and Mediterranean or low-latitude gardens can ripen lines that northern gardens never will.

The usable rule of a seed pack: an “outdoor” line finishing date is stated for the breeder’s own latitude, normally a point within temperate Europe or the western United States, and every degree north of it moves the finish back into the weather. A grower above about the fiftieth parallel that wants a true sativa in the garden needs to be shopping for a sativa autoflower or a covered space, and not a longer summer.