Sativa seeds come with more jargon attached than any other kind of cannabis seed, and most of it means one 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. A failed sativa grow nearly always traces back to a word that was read in the wrong sense: a flowering time taken as a fixed number, a “sativa-dominant” tag read as a statement of character, a landrace bought like it were a tent-bred hybrid. The entries below were written with the range at https://hazesativaseeds.com open for reference, because it leans heavily towards the classic end of the spectrum and that is where the words matter most; the meanings though apply to any sativa seed from any seller. They are in no special order, since not one of them makes sense without the others.
Haze
In its first sense a specific line of plants bred in coastal California from Mexican, Colombian and South Indian landraces, and then kept and worked in the Netherlands. A true Haze grows tall, branches openly, takes for twelve to to sixteen weeks and carries a scent of spice, citrus and a note sharp that no other line exactly has.
In its second sense “Haze” is any cross that contains some of that family, and by now is most of the sativa-leaning catalogue. A listing that reads “Haze” and gives no lineage could be mostly percent the classic family or a sixteenth of it, and the flowering time follows the share, not the name. The useful question is never “is it a Haze” but “how much, and through which parent”.
Equatorial
Refers to plants from latitudes in which daylength hardly varies through the year, which means where the plant never develop a strong response to changing days. Such plants frequently flower slowly at a conventional twelve-hour light cycle, since twelve hours is, to them, an ordinary day and not a signal.
The working response, handed down between sativa growers over decades, is to cut the light further: eleven hours, occasionally ten, especially during the final weeks. It costs some yield yield and buys a earlier clearer finish. A listing that uses “equatorial” is telling you about this in one word, and a grower that takes it as a note on origin has missed the point inside it.
Sativa-dominant
A catalogue category rather than a measurable one. It usually indicates that more of a hybrid’s parents are classed as sativa according to the breeder who drafted the description, which occasionally means no more than that the flowers are airier or the aroma brighter than the same breeder’s indica-labelled releases.
The experience people connect with a word, clear-headed rather than heavy, is driven far more by terpene profile and by THC content than by the sativa fraction, and a good number of “sativa-dominant” hybrids deliver a flat couch effect while plenty of indica-labelled lines do the reverse. For a buyer the percentage is useful as a rough guide to growth habit, flowering time and stretch; for a guide to effect it is close to useless without the terpene notes.
Landrace versus heirloom
A population of plants shaped through centuries to a particular region by local growers and climate together, rather than by modern selection. Thai, Thai, Congolese and Oaxacan lines are the classic sativa cases. A landrace is a spread, not a one plant: inside a pack the flowering times, flowering times and smells spread widely than any tent-bred line, and this spread is the point of keeping one.
The mistake is buying a landrace as a finished product. It carries traits that make sense in an equatorial field, such as a frame that no tent can contain and a flowering clock tuned to a daylength most growers cannot offer. “Heirloom” on a listing usually means a landrace that has been reproduced somewhere over some generations, typically with a degree of selection towards tent life; it is closer to usable but still far from a hybrid. A seller listing “landrace” without an origin region and a reproduction count is applying the word loosely, and the pack should be priced with that in mind.
Intersex tendency
The appearance of male flowers on a female plant, typically towards the end in flower and frequently under stress. Almost every cannabis line carries some capacity for it; long-flowering lines show it more often, and the reason is one simple reason: sixteen weeks of flower is sixteen weeks of opportunity for a timer leak, a heat spike or a late watering that can trigger it off, and a plant plant has already gone beyond its intended end frequently produces a few desperate pollen flowers on its own in a last attempt to set seed.
None of this makes a sativa strain weak by course; it means the grower’s discipline count over longer. A sealed room, steady conditions and harvesting when the plant is ready rather than a week later take away the greater part of the risk. A listing that mentions the breeder screens parents for intersex tendency is saying something more for a sativa than on any other category.
Stretch (the doubling)
The surge of upward growth that comes after the change to flowering. Indica-leaning plants add half their height again; sativas routinely double, and a few equatorial types go further. The stretch continues three to five weeks and will not be stopped after it has started, only redirected by training.
In practical terms, a stretch figure is a number to read ahead of deciding when to flip. A sativa switched at sixty centimetres in a standard tent is touching the lamp by week four of flower; one switched at thirty centimetres centimetres has room. Growers coming over from indica strains nearly always flip far too late the first time, and the lesson is visible on the ceiling of the tent.
Latitude (outdoor sativas)
The single number that decides whether a sativa will ripen outdoors, and a number no pack prints. Long-flowering lines require the autumn days to go on late enough for the plant to ripen; at northern latitudes the frost arrives first, and the grower harvests a unripe plant in the end of October or loses it to mould in November. The closer to the equator, within the northern hemisphere, the later the season stretches, and coastal and low-latitude gardens can ripen lines that northern growers never will.
The practical reading of a seed listing: an “outdoor” line finishing date is stated for the breeder’s own latitude, normally a point within southern Europe or the western United States, and every degree further north of it pushes the finish back towards the frost. A grower above about the fiftieth parallel who is after a long-flowering sativa in the garden needs to be looking for a sativa autoflower or else a greenhouse, and not a better summer.
Flowering time
The number of weeks from the onset of flowering and harvest, which is the single most misunderstood figure on a sativa pack. For photoperiod seed it is counted from the day the light drops to twelve hours, rather than from germination, so a “fourteen-week” sativa grown with a eight-week vegetative stage is a five-month plant. Seed companies additionally give the shorter end of a spread, because the longer end moves less seed.
Long-flowering plants take anywhere from ten weeks to well over twenty, and the longest strain in the Haze Sativa Seeds range is at around 16 weeks after the switch. The catalogue can be sorted by that number, which is a sensible first step if you have a room with a tight timetable. A grower who adds four weeks to whatever the pack says is rarely caught out.
Terpinolene (the “sativa smell”)
A aromatic compound found in high amounts in a lot of old sativa lines and responsible for much of the thing people mean as the “sativa” aroma: fresh, woody, citrus and slightly sweet at once. It is fragile, driven off easily through hot drying, and it fades faster during the cure than the earthier terpenes that dominate indica-leaning stock.
For a seed buyer the name earns two jobs. Where a listing names terpinolene among the lead terpene, the strain probably has substantial old-sativa ancestry regardless of what the label says. And where the you wants that profile to still be there to the jar, the cure has to be slow and cool; a fast dry turns a terpinolene line into a flower that smells of hay and no trace of what the pack promised.
Foxtailing
The tendency of certain flowers to push out new bud growth on top of old ones, producing towered, open buds instead of dense ones. In the majority of indica-leaning strains it is a heat response, typically from light that is too close or temperatures that is too high, and the standard response is to correct the room.
In many sativas, above all Thai and some Haze hybrids, it is genetic and will happen under a flawless room. A new sativa grower often wastes a month hunting a fault that was never a problem, lowering lights and heat only slowing a long plant even more. The listing rarely says which kind to expect; the parentage generally does.