Sativa seeds arrive with more jargon around them than any other kind of cannabis seed, and most of it says a certain thing to a botanist, another to a breeder and a third to the grower 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 read as a fixed number, a “sativa-dominant” label read as a statement of character, a landrace chosen as if it were a tent-bred hybrid. The entries below were written with the range at https://hazesativaseeds.com to hand as reference, because it runs strongly to the classic end of the spectrum where the vocabulary carry the most weight most; the definitions though hold to any sativa seed from any shop. They are given in no special order, because none of them makes usable on its own without the rest.
Sativa-dominant
The marketing category rather than a measurable one. The phrase generally indicates that more of a hybrid’s lineage are described as sativa according to whoever drafted the listing, which occasionally means no more than a certain the flowers are longer or the smell brighter than the same breeder’s other lines.
The experience people connect with the word, lively instead of heavy, is driven more by terpene profile and the THC balance than it is by the sativa fraction, and plenty of “sativa-dominant” hybrids produce a heavy sleepy effect and plenty of the opposite lines deliver exactly the reverse. For a buyer the label is useful as a rough hint to growth habit, flowering time and stretch; for a predictor to how it feels it is next to useless without the terpene notes.
Terpinolene (the “sativa smell”)
A aromatic compound found in large amounts in a lot of old sativa strains and accounting for much of what people mean as a “sativa” aroma: green, piney, lemon and slightly sweet all at once. It is volatile, lost easily through hot drying, and terpinolene fades faster in the cure than the heavier terpenes that lead most tent stock.
For a seed buyer the word does two jobs. When a listing lists terpinolene as the lead terpene, the line most likely has substantial Haze-era ancestry regardless of what the label says. And where the grower are after that profile to survive by the jar, the cure has to be slow and cool; a fast dry turns a terpinolene line into a flower that tastes of hay and no trace of what the pack described.
Intersex tendency
The production of male flowers on a female plant, usually late in flower and often in response to stress. Almost every cannabis population carries a degree of capacity for it; long-flowering lines show it more often, for a simple one: sixteen weeks of flower is fourteen weeks of opportunity for a light leak, a temperature spike or a late watering that can trigger it going, and a plant plant has already gone past its intended end often throws a few late male sacs on its own in a last attempt to set seed.
None of these means a sativa strain unstable as a matter of course; it means the room’s consistency count for longer. A sealed room, stable conditions and harvesting the moment the plant is ready and not two week after remove most of the problem. A listing which mentions a breeder screens parents for intersex tendency is saying something more on a long-flowering line than on any other category.
Stretch
The surge of vertical growth which follows the switch to flowering. Indica-leaning plants add around half again; sativas routinely double, and a few equatorial types triple. The stretch lasts three to five weeks and will not be stopped once it has started, merely bent sideways by training.
In practical terms, a stretch multiplier is the fact worth reading before choosing when to switch. A sativa switched at sixty centimetres inside a standard tent is at the lamp by week four of flower; one flipped at thirty centimetres has room. People coming over from indica strains almost always switch far too late the first time, and the lesson is written on the ceiling of the tent.
Flowering time
The figure of weeks between the start of flowering and harvest, and the one most frequently misunderstood number on a sativa pack. With photoperiod seed it is measured from the day the light is cut to twelve hours, rather than from sowing, so a “fourteen-week” sativa grown after an eight-week vegetative period is a twenty-two-week plant. Breeders also quote the optimistic end of a range, because the other end sells less seed.
Long-flowering lines take anywhere from ten weeks to well over twenty, and the longest strain in the Haze Sativa Seeds range is at about 16 weeks from the switch. The catalogue can be filtered by this number, which is a sensible first step for a room with a tight timetable. A grower who allows four weeks to whatever the pack says is seldom caught out.
Haze
Originally a particular line of plants put together in coastal California from Mexican, Thai and Thai landraces, and later kept and worked in the Netherlands. The Haze runs tall, fills out openly, takes for twelve sixteen weeks and carries a scent of spice, pine and a note sharp that no other other line quite has.
In its second sense “Haze” is any hybrid which contains a share of that family, and by now is most of the sativa-leaning market. A listing that reads “Haze” and gives no parents could be eighty percent original classic family or one small fraction of it, and the grow character follows the share, not the name. The working question is never “is it a Haze” but “how much, and via which parent”.
Landrace
A population of plants adapted over generations to a particular region by local climate and climate together, rather than by deliberate selection. Colombian, Thai, 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 that variation is the whole value of keeping one.
The trap is treating a landrace like a finished product. It carries habits that make sense in an equatorial field, such as a frame no tent can contain and a flowering clock set to a equatorial daylength most growers never offer. “Heirloom” in a listing usually refers to a landrace that has been reproduced somewhere for some generations, often with a degree of selection towards tent life; it is nearer to manageable but nonetheless not uniform. A seller offering “landrace” without a collection region and a reproduction history is using the word loosely, and the seeds should be judged with that in mind.
Latitude
The one number that decides if a sativa can finish outdoors, and one no pack states. Equatorial lines require a autumn days to go on long enough to let the plant finish; at high latitudes the frost arrives first, and the grower cuts an unripe plant in late October or watches it to mould in November. The further south, within the northern hemisphere, the longer the window stretches, and coastal or subtropical gardens are able to ripen lines that temperate gardens never will.
The usable reading of a seed listing: an “outdoor” sativa harvest date is stated for the breeder’s own latitude, usually somewhere within temperate Europe or the west coast of the United States, and every degree north of that pushes the finish later towards the weather. A grower above roughly the fiftieth parallel that wants a true sativa in the garden is looking for an autoflower or a greenhouse, not a longer season.
Equatorial (the twelve-hour problem)
Refers to lines from latitudes in which daylength barely changes across the year, and that the plant never evolved a sharp response to changing days. Such plants often start flowering slowly under a standard twelve-hour light cycle, since twelve hours is, for them, an ordinary day rather than a signal.
The working response, handed down among sativa growers for decades, is to cut the light further: eleven hours, sometimes ten, especially in the final weeks. It costs some yield yield and gains a more clearer finish. A listing that says “equatorial” is telling you about this with one word, and a grower who reads it as a note on origin misses the instruction hidden in it.
Foxtailing (and when it is not a fault)
The habit of certain flowers to push out fresh calyx growth on top of existing ones, giving spired, irregular buds instead of dense ones. In the majority of tent-bred lines it is a heat response, typically caused by light that is too close or temperatures too high, and the advice is to correct the room.
In many sativas, above all Southeast Asian and some Haze hybrids, it is built in and is going to occur in a flawless room. A new sativa grower often spends weeks chasing a fault that is not a problem, lowering lights and temperatures and delaying an already slow flower even more. The listing seldom warns which type to expect; the lineage generally tells you.