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, something else to a seed company and a third to the person trying to make a decision in front of the listing. The 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 promise, a “sativa-dominant” tag read as a statement of character, a landrace bought like it were a modern hybrid. The entries below were put together with the range at https://hazesativaseeds.com to hand for the concrete examples, since it leans strongly towards the classic end of the spectrum and that is where the vocabulary carry the most weight most; the meanings though hold to any sativa seed from any shop. They are given in no special order, because not one of them makes usable on its own without the others.
Equatorial
Describes lines out of regions in which daylength hardly changes through the year, which means that the plant does not develop a strong reaction to changing days. These plants often flower reluctantly at a standard twelve-hour light cycle, since twelve hours is, for them, a mild unremarkable day rather than a signal.
The working response, passed around among sativa growers over decades, is to shorten the light further: eleven hours, sometimes ten, particularly in the final weeks. It loses a little yield and gains an earlier decisive finish. A listing that says “equatorial” is warning you this with one word, and a grower that reads it as mere origin misses the instruction hidden in it.
Hermaphroditism in long-flowering lines
The appearance of male flowers on a female plant, usually late in flower and often under stress. Almost every cannabis population carries a degree of tendency for do; sativa plants show it more often, and the reason is one plain reason: sixteen weeks of flower is sixteen weeks of opportunity for a light leak, a heat spike or a late watering to trigger it going, and a plant that has already waited beyond its natural end often produces a few desperate pollen flowers on its own in a final attempt to make seed.
Not one of these means a sativa strain weak as a matter of nature; it makes the room’s consistency count for a longer stretch. Light-tight room, stable conditions and cutting when the plant is done rather than a weeks later take away most of the risk. A listing that states the breeder tests parents for hermaphrodite tendency is worth worth hearing on a sativa than on anything else.
Terpinolene (the “sativa smell”)
A terpene present in large amounts in a lot of classic sativa lines and accounting for much of what people mean as the “sativa” aroma: green, woody, citrus and faintly floral all at once. It is volatile, driven off quickly by hot drying, and it fades faster during storage than the heavier terpenes which dominate indica-leaning stock.
For a seed buyer the word earns two jobs. When a listing names terpinolene as the leading terpene, the strain probably has real Haze-era ancestry regardless of what the label claims. And where the grower are after that profile to survive to the jar, the cure is going to be slow and cool; a warm dry flattens a terpinolene line into a flower that tastes of hay and no trace of what the pack promised.
Stretch (the doubling)
The surge of upward growth that comes after the switch to flowering. Most tent-bred plants gain half again; sativas commonly double, and some landrace types triple. The stretch lasts two to four weeks and cannot be halted after it has started, only redirected by training.
In practical terms, a stretch multiplier is a fact to read ahead of choosing when to switch. 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. Growers moving over from indica stock nearly always flip too late the first time, and the consequence is written on the ceiling of the tent.
Flowering time
The number of weeks between the start of flowering and maturity, and 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 sowing, so a “fourteen-week” sativa started with an ordinary vegetative period is a five-month plant. Seed companies also give the optimistic end of a range, because the longer end sells fewer seed.
Sativa plants take anywhere from ten weeks to more than twenty, and the longest strain in the Haze Sativa Seeds range is at around 16 weeks from the switch. The catalogue can be filtered by this figure, which is the reasonable first step for a room with a tight schedule. A grower who adds four weeks on top of the figure the pack states is rarely caught out.
Sativa-dominant (the label)
The catalogue term rather than a measurable one. It 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 no more than that the buds are airier or the aroma sharper than the that breeder’s indica-labelled releases.
The experience people connect with a word, clear-headed rather than sedating, is driven more by terpene chemistry and by cannabinoid content than by ancestry, and a good number of “sativa-dominant” releases produce a flat couch effect while plenty of the opposite lines deliver 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 effect it is next to worthless without the terpene description.
Landrace
A population of plants adapted through generations to one region by the local growers and climate alike, rather than by modern selection. Colombian, Colombian, Malawian and Mexican stock are the classic sativa cases. A landrace is a spread, not a one plant: within a pack the heights, finishing times and smells spread far more than any tent-bred line, and this spread is the whole value of growing one.
The mistake is treating a landrace as a finished hybrid. It carries habits that make sense in an open field, including height that no tent can hold and a flowering rhythm set to an daylength the majority of growers cannot offer. “Heirloom” on a listing generally refers to a landrace that has been reproduced somewhere over a number of generations, often with light selection for indoor conditions; it is nearer to usable but still far from uniform. A shop listing “landrace” without a collection region and a reproduction count is using the word as a flavour, and the pack should be judged accordingly.
Haze (the family, not the smell)
In its first sense a specific family of plants put together in coastal California from Mexican, Thai and Thai parents, and then preserved and worked in the Netherlands. The Haze grows tall, branches openly, flowers for twelve to to sixteen weeks and smells of spice, pine and a note sharp that no line quite has.
In its looser sense “Haze” is whatever hybrid which carries a share of that family, which today is most of the sativa-leaning market. A listing which says “Haze” and gives no parents could be mostly percent the old family or one sixteenth of it, and the flowering time follows the share, not the name. The useful question is not “is it a Haze” but “how much, and through which parent”.
Foxtailing (and when it is not a fault)
The habit of certain flowers to push out new calyx clusters on top of old ones, giving spired, open buds instead of dense ones. In the majority of tent-bred strains it is a heat response, typically caused by light that is too close or temperatures too high, and the standard response is to fix the room.
In a good number of sativas, especially Thai and certain Haze hybrids, it is built in and will happen in a perfect room. A first-time sativa grower frequently wastes weeks hunting a fault that was never a problem, dropping lights and temperatures only delaying an already slow plant even more. The breeder seldom warns which type you should expect; the parentage usually does.