Sativa seeds arrive with more vocabulary attached than any other category of cannabis seed, and most of it says a certain thing to a botanist, something else to a seed company and something different again to the person trying to make a decision in front of the pack. The 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” label taken as a statement of character, a landrace bought as if 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 runs strongly towards the long-flowering end of the spectrum and that is where the words carry the most weight most; the meanings though apply to any sativa seed from any seller. They are given in no special order, because not one of them makes usable on its own without the others.
Terpinolene
A terpene found in high amounts in a lot of classic sativa strains and responsible for much of the thing growers describe as a “sativa” smell: green, woody, lemon and faintly floral all at once. It is volatile, lost easily through hot drying, and it degrades more quickly during the cure than the heavier terpenes that lead indica-leaning lines.
For a seed buyer the name earns two jobs. Where a listing names terpinolene among the leading aromas, the strain most likely carries real old-sativa genetics regardless of what the label claims. And when the you wants that smell to still be there to the jar, the cure has to be cool and cool; a warm drying room turns a terpinolene line to something that tastes of very little and nothing of what the pack described.
Equatorial (the twelve-hour problem)
Refers to plants out of regions where daylength barely varies through the year, and that the plant does not develop a strong response to changing days. These plants frequently flower slowly under a conventional twelve-hour schedule, since twelve hours is, to them, a mild ordinary day and not a signal.
The working response, handed down between sativa growers for decades, is to cut the light further: eleven hours, occasionally ten, especially during the last weeks. It loses some little yield and buys an earlier clearer end. A listing which uses “equatorial” is telling you about this with one word, and a grower that takes it as a note on origin misses the instruction inside it.
Haze
In its first sense a particular line of plants put together in coastal California from Colombian, Colombian and South Indian landraces, and later kept and refined in the Netherlands. The Haze grows tall, fills out openly, flowers for twelve to to sixteen weeks and carries a scent of spice, citrus and a note sharp that no other line exactly reproduces.
In its looser sense “Haze” is any hybrid which carries a share of that family, which today is a great many of the sativa-leaning market. A listing which reads “Haze” and gives no lineage may be mostly percent the classic family or a sixteenth of it, and the grow character tracks the fraction, not the name. The working question is never “is it a Haze” but “how much, and through which parent”.
Sativa-dominant
The marketing category and not a botanical one. The phrase usually means that more of a hybrid’s lineage are described as sativa by whoever wrote the description, and sometimes means nothing more than that the flowers are airier or the aroma brighter than the that breeder’s other releases.
The effect people associate with a word, lively instead of heavy, is driven far more by terpene profile and by THC balance than by the sativa fraction, and a good number of “sativa-dominant” hybrids deliver a flat couch result while plenty of the opposite lines deliver exactly the opposite. To a grower the percentage is useful for a loose guide to growth habit, flowering time and stretch; for a guide to how it feels it is next to worthless unless accompanied by the terpene notes.
Stretch
The surge of vertical growth which comes after the change to flowering. Indica-leaning plants gain around half again; sativas routinely double, and some equatorial lines triple. The stretch continues three to four weeks and cannot be halted after it has started, merely bent sideways by training.
In practical terms, a stretch figure is a number worth reading before choosing when to switch. A sativa flipped at sixty centimetres inside a standard tent is touching the lamp before week four of flower; one flipped at thirty centimetres has room. People moving over from indica strains nearly 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 number of weeks between the onset of flowering and maturity, and the one most misread number 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 started with an ordinary vegetative stage is a five-month plant. Seed companies additionally quote the shorter end of the spread, since the other end sells fewer seed.
Sativa lines take everywhere from ten weeks to well over twenty, and the slowest strain in the Haze Sativa Seeds range comes in at about 16 weeks after the flip. The catalogue can be sorted by that number, which is a sensible first pass if you have a room with a fixed timetable. A grower who allows four weeks to whatever the pack says is seldom disappointed.
Landrace
A population of plants shaped over generations to a particular place by local climate and growers together, rather than by deliberate breeding. Colombian, Thai, Malawian and Mexican stock are the sativa cases. A landrace is a spread, not a one plant: inside a pack the flowering times, flowering times and smells spread far more than a tent-bred hybrid, and that spread is the point of keeping one.
The trap is treating a landrace like a modern hybrid. It carries traits that made sense in an open field, such as height that no tent can hold and a flowering rhythm tuned to a equatorial daylength the majority of growers cannot provide. “Heirloom” on a listing usually refers to a landrace that has been grown out away from its origin over some generations, typically with light selection towards tent conditions; it is closer to usable but still not a hybrid. A seller offering “landrace” without an collection point and a reproduction history is applying the word loosely, and the pack should be priced with that in mind.
Hermaphroditism in long-flowering lines
The production of pollen-bearing flowers on a female plant, typically late in flower and frequently in response to stress. Every cannabis line has a degree of capacity for it; long-flowering lines show it more, for a simple reason: sixteen weeks of flower is fourteen weeks of opportunity for a timer leak, a temperature spike or a late watering that can set it off, and an old plant has already waited beyond its intended end frequently produces a few late male flowers on its own in a last effort to set seed.
None of this means a sativa line unstable by nature; it means the grower’s consistency matter for a longer stretch. A sealed room, stable conditions and harvesting the moment the plant is done rather than a weeks after take away the greater part of the problem. A listing which mentions a breeder tests parents for hermaphrodite tendency is saying something more on a sativa than for any other category.
Latitude (outdoor sativas)
The one number that decides if a sativa will finish outdoors, and one that no pack prints. Equatorial plants require the run of shortening days to go on late enough to let the plant finish; at high latitudes the frost arrives first, and the grower harvests an half-finished plant in the end of October or watches it to mould in November. The closer to the equator, in a northern hemisphere, the later the season runs, and coastal and low-latitude gardens are able to ripen lines that northern gardens never will.
The usable reading of a seed pack: an “outdoor” sativa harvest date is stated for the breeder’s home latitude, usually a point in southern Europe or the western United States, and each degree further north of it pushes the finish back towards the frost. A grower above roughly the fiftieth parallel who wants a long-flowering sativa outdoors is looking for an autoflower or a covered space, not a longer season.