Sativa seeds come with more vocabulary around them than any other category of cannabis seed, and most of it says one thing to a botanist, another to a breeder and something different again to the grower standing in front of the listing. The failed sativa grow usually traces back to a word that was understood in the wrong one of those senses: a flowering time read 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 put together with the range at https://hazesativaseeds.com to hand for the concrete examples, because it leans strongly towards the long-flowering end of the category where the vocabulary carry the most weight most; the definitions themselves hold to any sativa seed from any shop. They are in no special order, because none of them makes usable on its own without the rest.

Latitude (outdoor sativas)

The single number that decides whether a sativa can finish outdoors, and a number that no pack states. Long-flowering plants need the run of shortening days to go on late enough to let the plant to finish; in northern latitudes the frost arrives before that, and the grower cuts a half-finished plant in the end of October or else watches it rot in November. The further to the equator, within the northern hemisphere, the later the window stretches, and coastal and low-latitude gardens are able to ripen plants that temperate growers cannot.

The usable reading for a seed pack: an «outdoor» line harvest month is given for the breeder’s own latitude, usually a point in temperate Europe or the western United States, and every degree further north of that pushes the date back towards the weather. A grower above about the fiftieth parallel who is after a long-flowering sativa in the garden needs to be shopping for a sativa autoflower or a greenhouse, and not a longer season.

Terpinolene (the «sativa smell»)

A terpene found in high proportion in many old sativa strains and responsible for most of the thing people mean as a «sativa» aroma: fresh, piney, citrus and faintly floral all at once. It is fragile, lost quickly through fast drying, and terpinolene degrades more quickly in storage than the heavier terpenes which dominate indica-leaning stock.

For a seed buyer the name earns two jobs. When a listing names terpinolene among the lead aromas, the strain probably carries real Haze-era ancestry regardless of what the percentage says. And where the you wants that smell 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 tastes of hay and nothing of what the pack promised.

Intersex tendency

The production of male flowers on a female plant, typically late in flower and frequently under stress. Every cannabis line carries a degree of tendency for do; sativa plants express it more, and the reason is one simple one: sixteen weeks of flower is sixteen weeks of exposure for a light leak, a heat spike or a late watering that can set it going, and a old plant has waited beyond its intended finish often throws a few desperate male sacs on its own in a last effort to set seed.

Not one of these means a sativa line weak by nature; it means the grower’s consistency matter over longer. Light-tight tents, steady temperatures and cutting the moment the plant is done rather than two weeks later take away most of the risk. A listing that mentions a breeder tests parents for intersex traits is saying something more on a long-flowering line than for anything else.

Flowering time (and what it is counted from)

The number of weeks from the start of flowering and maturity, which is the single most misread figure on a sativa pack. With photoperiod seed it is counted from the day the light is cut to twelve hours, not from germination, so a «fourteen-week» sativa started with a ordinary vegetative period is a five-month plant. Breeders also give the optimistic end of a spread, 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 around 16 weeks from the flip. The catalogue can be filtered by this figure, which is a reasonable first step if you have a room with a tight schedule. A grower who adds four weeks to whatever the pack says is seldom caught out.

Foxtailing

The tendency of some flowers to grow fresh bud clusters on top of old ones, giving spired, open buds instead of round ones. In most tent-bred strains it is a stress symptom, usually caused by light that is too close or a room that is too high, and the advice is to correct the cause.

In a good number of sativas, especially Thai and some Haze lines, it is genetic and is going to happen in a perfect room. A new sativa grower frequently wastes a month chasing a problem that is not there, dropping lights and heat and slowing a slow plant even more. The listing seldom warns which type to expect; the parentage usually tells you.

Sativa-dominant (the label)

A marketing term rather than a measurable one. It usually means that more of a hybrid’s parents are described as sativa by whoever wrote the description, and occasionally means no more than that the flowers are airier or the aroma sharper than the that breeder’s other lines.

The effect people associate with the word, clear-headed rather than sedating, is governed far more by terpene profile and by cannabinoid balance than it is by the sativa fraction, and plenty of «sativa-dominant» hybrids produce a flat couch effect and plenty of indica-labelled lines deliver exactly the opposite. To a grower the label is useful as a rough guide to growth habit, flowering time and stretch; as a guide to effect it is next to useless unless accompanied by the terpene notes.

Stretch (the doubling)

The burst of upward growth that comes after the change to flowering. Indica-leaning plants add around half again; sativas commonly double, and some landrace types go further. The stretch lasts three to five weeks and will not be stopped after it begins, merely redirected by training.

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

Equatorial

Describes plants from regions where daylength hardly changes through the year, which means where the plant never evolved a strong reaction to changing days. These lines frequently start flowering slowly at a standard twelve-hour light cycle, because twelve hours is, for them, a mild unremarkable day rather than a signal.

The practical fix, passed down among sativa growers over decades, is to cut the light further: eleven hours, sometimes ten, especially during the final weeks. It costs a little yield and gains an earlier clearer finish. A listing which uses «equatorial» is telling you about this in one word, and a grower that reads it as mere origin has missed the instruction inside it.

Landrace versus heirloom

A population of plants adapted through centuries to a particular place by the local growers and growers together, and not by modern breeding. Thai, Colombian, Malawian and Oaxacan stock are the sativa examples. A landrace is a spread, rather than a one plant: inside a pack the flowering times, flowering times and smells spread far more than any tent-bred hybrid, and this variation is the point of keeping one.

The mistake is treating a landrace as a finished product. It brings traits that made sense in an equatorial field, such as a frame that no tent can contain and a flowering clock tuned to a daylength most growers never provide. «Heirloom» in a listing generally refers to a landrace that has been grown out somewhere over a number of generations, typically with a degree of selection towards indoor life; it is closer to usable but nonetheless far from uniform. A seller offering «landrace» without a collection point and a reproduction count is using the word loosely, and the seeds should be judged accordingly.