Sativa seeds arrive with more jargon around them than any other category of cannabis seed, and a good deal of it says one thing to a botanist, another to a seed company and a third to the person trying to make a decision in front of the pack. The failed sativa grow usually traces 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 character, a landrace bought as if it were a tent-bred hybrid. The entries below are put together with the range at https://hazesativaseeds.com open for reference, since it leans strongly towards the long-flowering end of the category and that is where the vocabulary carry the most weight most; the meanings though apply to any sativa seed from any shop. They are given in no special order, since not one of them is sense on its own without the others.
Landrace
A population of plants adapted through centuries to one place by local growers and growers alike, and not by deliberate breeding. Thai, Colombian, Congolese and Mexican stock are the classic sativa examples. A landrace is a spread, rather than a single plant: inside a pack the flowering times, finishing times and smells spread far more than any tent-bred hybrid, and this variation is the point of keeping one.
The mistake is buying a landrace as a finished hybrid. It brings habits that made sense in an equatorial field, including height no tent can hold and a flowering rhythm set to an equatorial daylength most growers cannot provide. “Heirloom” on a listing generally refers to a landrace that has been grown out somewhere for a number of generations, typically with light selection towards indoor conditions; it is closer to manageable but still not uniform. A shop listing “landrace” that does not give a collection region and a generation count is using the word as a flavour, and the seeds should be judged with that in mind.
Sativa-dominant (the label)
A marketing category and not a botanical one. It usually means that the larger share of a hybrid’s parents were classed as sativa by the breeder who wrote the listing, and sometimes means nothing more than a certain the flowers are airier or the aroma brighter than the same breeder’s other releases.
The experience people connect with the word, clear-headed rather than heavy, is governed more by terpene profile and the THC balance than it is by ancestry, and plenty of “sativa-dominant” releases produce a flat couch effect while a good number of indica-labelled stock do the opposite. To a grower the label is worth something as a rough guide to growth habit, flowering time and stretch; for a predictor to how it feels it is close to worthless without the terpene description.
Foxtailing
The tendency of certain flowers to push out new bud clusters on top of existing ones, giving spired, open buds rather than round ones. In most tent-bred lines it is a stress response, typically caused by light too close or a room too high, and the advice is to correct the room.
In many sativas, especially Thai and certain Haze hybrids, it is genetic and will happen under a flawless room. A new sativa grower frequently spends a month chasing a fault that was never not a problem, lowering lights and heat and slowing a long flower even more. The breeder rarely says which kind you should expect; the parentage generally tells you.
Latitude
The one number that determines whether a sativa will finish outdoors, and a number that no pack prints. Long-flowering plants require the autumn days to go on late enough to let the plant ripen; in northern latitudes the frost comes first, and the grower harvests an unripe plant in late October or else watches it to mould in November. The closer to the equator, in the northern hemisphere, the longer the window runs, and coastal and subtropical gardens are able to ripen plants that northern growers never will.
The practical reading of a seed pack: an “outdoor” line finishing date is given for the breeder’s home latitude, normally somewhere in temperate Europe or the west coast of the United States, and each degree further north of it pushes the date later into the frost. A grower above about the fiftieth parallel who wants a true sativa outdoors needs to be shopping for a sativa autoflower or a greenhouse, and not a better summer.
Stretch (the doubling)
The surge of upward growth that comes after the change to flowering. Indica-leaning plants add around half again; sativas commonly double, and a few equatorial lines triple. The stretch continues three to four weeks and cannot be stopped once it has started, merely bent sideways by training.
In tent terms, a stretch figure is a number to read before deciding when to switch. A sativa switched at sixty centimetres in a two-metre tent is touching the lamp by week four of flower; one switched at thirty centimetres has room. Growers moving from indica stock nearly always flip far too late the first time, and the consequence is written on the ceiling of the tent.
Equatorial (the twelve-hour problem)
Describes plants from regions where daylength barely varies across the year, and where the plant does not evolved a strong response to shortening days. Such lines frequently start flowering slowly at a standard twelve-hour schedule, because twelve hours is, to them, a mild unremarkable day and not a signal.
The working response, handed down among sativa growers for decades, is to shorten the light further: eleven hours, sometimes ten, particularly in the last weeks. It costs a yield yield and gains an earlier clearer finish. A listing which uses “equatorial” is warning you this in one word, and a grower who reads it as mere geography has missed the point inside it.
Haze (the family, not the smell)
Originally a particular line of plants put together in 1970s California from Colombian, Thai and South Indian landraces, and later preserved and worked in the Netherlands. A true Haze runs tall, branches sparsely, takes for twelve to to sixteen weeks and smells of incense, pine and a note metallic that no other line quite has.
In its looser sense “Haze” is whatever hybrid which carries some of that family, which by now is a great many of the sativa-leaning market. A listing which says “Haze” without lineage could be mostly percent original old family or a small fraction of it, and the flowering time tracks the share, not the name. The working question is not “is it a Haze” but “how much, and through which parent”.
Flowering time (and what it is counted from)
The figure of weeks between the onset of flowering and maturity, which is the single most misread number on a sativa pack. With photoperiod seed it is measured from the day the light drops to twelve hours, not from germination, so a “fourteen-week” sativa started with an eight-week vegetative period is a five-month plant. Seed companies also quote the optimistic end of the spread, since the other end moves less seed.
Sativa lines run 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 number, which is a sensible first step for a room on a tight schedule. A grower who allows four weeks on top of the figure the pack states is seldom caught out.
Intersex tendency
The appearance of pollen-bearing flowers on a female plant, typically towards the end in flower and frequently in response to stress. Every cannabis population has some capacity to it; sativa plants express it more often, for a simple reason: sixteen weeks of flower is fourteen weeks of opportunity for a light leak, a heat spike or a late watering that can set it going, and a old that has gone past its natural end frequently throws a few desperate pollen sacs on its own in a final attempt to make seed.
Not one of these means a sativa strain weak as a matter of course; it means the grower’s discipline count for longer. Light-tight tents, steady temperatures and cutting when the plant is done rather than a week later take away the greater part of the risk. A listing that states the breeder tests parents for intersex traits is saying something more on a long-flowering line than for any other category.
Terpinolene (the “sativa smell”)
A terpene present in high amounts in many classic sativa lines and accounting for most of the thing growers mean as a “sativa” aroma: green, woody, lemon and faintly sweet at once. It is fragile, lost easily through fast drying, and terpinolene degrades faster during storage than the earthier terpenes that dominate most tent stock.
For a seed buyer the name earns two things. Where a listing lists terpinolene as the leading aromas, the line probably has real old-sativa genetics whatever the label says. And where the you wants that profile to still be there by the jar, the drying is going to be slow and slow; a fast dry flattens a terpinolene sativa to a flower that smells of very little and no trace of what the pack described.