Sativa seeds come with more vocabulary around them than any other category of cannabis seed, and a good deal of it means one thing to a botanist, another to a seed company and something different again to the person standing in front of the listing. The failed sativa grow nearly always goes 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 description of character, a landrace chosen like it were a tent-bred hybrid. The entries below were put together with the range at https://hazesativaseeds.com open as reference, because it runs strongly to the classic end of the category where the words matter most; the definitions themselves hold to any sativa seed from any seller. They are given in no special order, because none of them is usable without the rest.
Terpinolene (the “sativa smell”)
A aromatic compound found in large amounts in a lot of old sativa strains and responsible for most of the thing people describe as a “sativa” aroma: green, piney, lemon and faintly sweet at once. It is fragile, lost easily by fast drying, and it degrades more quickly during the cure than the earthier terpenes which dominate most tent stock.
For a seed buyer the name does two jobs. When a listing lists terpinolene as the lead aromas, the strain probably carries substantial old-sativa ancestry regardless of what the label claims. And when the grower are after that smell to survive to the jar, the drying is going to be cool and slow; a fast dry flattens a terpinolene sativa into a flower that smells of hay and no trace of what the pack described.
Sativa-dominant (the label)
A catalogue category rather than a measurable one. The phrase generally means that the larger share of a hybrid’s lineage were classed as sativa according to whoever wrote the description, and occasionally signals no more than a certain the flowers are longer or the smell brighter than the same breeder’s indica-labelled releases.
The experience people connect with the word, clear-headed rather than sedating, is governed more by terpene profile and by cannabinoid balance than by ancestry, and a good number of “sativa-dominant” hybrids deliver a heavy sleepy effect while a good number of the opposite stock deliver the opposite. For a buyer the label is worth something as a loose hint to growth habit, flowering time and stretch; for a guide to how it feels it is next to useless without the terpene description.
Haze (the family, not the smell)
Originally a particular line of plants put together in 1970s California from Mexican, Colombian and South Indian landraces, and then kept and worked in the Netherlands. The Haze grows tall, fills out openly, flowers for twelve sixteen weeks and carries a scent of spice, citrus and a note sharp that no line exactly has.
In its looser sense “Haze” is any cross which carries some of that family, which by now is most of the sativa-leaning market. A listing which says “Haze” without parents may be eighty percent the old family or a sixteenth of it, and the grow character tracks the share, not the name. The working question is never “is it a Haze” but “how much, and through which parent”.
Intersex tendency
The appearance of male flowers on a female plant, usually late in flower and frequently in response to stress. Almost every cannabis line has a degree of tendency for do; long-flowering plants show it more often, and the reason is a simple one: sixteen weeks of flower is fourteen weeks of exposure for a light leak, a temperature spike or a late watering that can trigger it off, and an old that has gone beyond its intended end frequently produces a few desperate pollen sacs on its own in a last attempt to make seed.
Not one of this means a sativa line weak by nature; it makes the room’s discipline count over longer. A sealed room, stable conditions and harvesting the moment the plant is done and not two week after take away most of the problem. A listing that states the breeder screens parents for hermaphrodite traits is saying something more for a long-flowering line than for any other category.
Stretch
The surge of upward growth that comes after the change to flowering. Most tent-bred plants add half again; sativas routinely double, and a few landrace lines triple. The stretch lasts three to four weeks and will not be stopped once it has started, merely redirected by training.
In tent terms, the stretch figure is a number worth read before deciding when to flip. A sativa switched at sixty centimetres inside a standard tent is at the lamp before week four of flower; one switched at thirty centimetres has room. People moving from indica stock almost always switch too late the first time, and the consequence is visible on the ceiling of the tent.
Flowering time (and what it is counted from)
The figure of weeks from the onset of flowering and harvest, and the single most misunderstood figure on a sativa pack. With photoperiod seed it is counted from the day the light is cut to twelve hours, rather than from germination, so a “fourteen-week” sativa grown after a eight-week vegetative period is a twenty-two-week plant. Seed companies also quote the shorter end of the range, since the other end sells fewer seed.
Sativa plants run everywhere from ten weeks to more than twenty, and the longest strain in the Haze Sativa Seeds range is at about 16 weeks from the switch. The catalogue can be sorted by that figure, which is the sensible first pass if you have a grower with a tight schedule. A grower who allows four weeks on top of whatever the pack states is seldom caught out.
Latitude (outdoor sativas)
The single figure that determines if a sativa can ripen outdoors, and a number no pack prints. Long-flowering lines need a run of shortening days to go on long enough for the plant to finish; at high latitudes the frost comes first, and the grower harvests an half-finished plant in late October or else loses it to mould in November. A closer south, within a northern hemisphere, the later the window runs, and coastal and low-latitude growers can ripen lines that temperate gardens never will.
The usable rule of a seed pack: an “outdoor” line harvest date is given for the breeder’s home latitude, usually somewhere in southern Europe or the western United States, and every degree north of that pushes the finish back towards the weather. A grower north of about the fiftieth parallel that wants a long-flowering sativa outdoors needs to be looking for a sativa autoflower or else a greenhouse, and not a longer season.
Equatorial
Describes lines from regions in which daylength barely changes through the year, which means that the plant does not develop a strong reaction to shortening days. These lines frequently flower reluctantly at a standard twelve-hour schedule, because twelve hours is, for them, an ordinary day rather than a signal.
The practical response, passed down between sativa growers over decades, is to cut the light more: eleven hours, sometimes ten, especially in the last weeks. It costs some yield yield and buys an earlier clearer end. A listing that says “equatorial” is warning you about this with one word, and a grower who takes it as a note on geography misses the point hidden in it.
Foxtailing (and when it is not a fault)
The tendency of some flowers to push out fresh bud clusters on top of existing ones, producing spired, irregular buds rather than round ones. In most indica-leaning lines it is a stress response, usually caused by light too close or temperatures that is too high, and the advice is to fix the cause.
In a good number of sativas, especially Thai and some Haze hybrids, it is genetic and will happen in a perfect room. A first-time sativa grower often wastes a month hunting a problem that was never not there, lowering lights and temperatures and delaying a slow plant further. The breeder rarely warns which kind you should expect; the parentage generally tells you.
Landrace
A population of plants shaped through centuries to one region by local growers and growers alike, and not by deliberate breeding. Colombian, Thai, Malawian and Oaxacan stock are the sativa cases. A landrace is variable, not a single plant: inside a pack the flowering times, flowering times and smells range widely than in a tent-bred hybrid, and that spread is the point of growing one.
The trap is treating a landrace like a modern product. It brings habits that make sense in an open field, including a frame that no tent can contain and a flowering rhythm set to an daylength most growers cannot provide. “Heirloom” in a listing generally means a landrace that has been grown out away from its origin over some generations, often with light selection towards tent conditions; it is closer to usable but still not uniform. A shop offering “landrace” that does not give a collection point and a reproduction history is using the word loosely, and the pack should be priced with that in mind.