Sativa seeds come with more vocabulary attached than any other kind 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 grower standing in front of the listing. The failed 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” tag taken as a statement of effect, a landrace bought as if it were a tent-bred hybrid. The entries below are put together with the range at https://hazesativaseeds.com to hand as reference, because it leans heavily to the classic end of the category and that is where the vocabulary matter most; the definitions though apply to any sativa seed from any shop. They are in no special order, since not one of them makes usable on its own without the rest.
Flowering time (and what it is counted from)
The figure of weeks from the start of flowering and maturity, which is the single most misunderstood number on a sativa pack. For photoperiod seed it is measured from the day the light drops to twelve hours, rather than from germination, so a “fourteen-week” sativa grown after a eight-week vegetative period is a five-month plant. Seed companies also give the optimistic end of a spread, because the other end sells fewer seed.
Sativa plants run everywhere from ten weeks to more than twenty, and the slowest strain in the Haze Sativa Seeds range comes in at about 16 weeks from the switch. The catalogue can be filtered by that figure, which is the reasonable first step for a grower with a tight timetable. A grower who adds four weeks to the figure the pack says is seldom disappointed.
Landrace versus heirloom
A population of plants shaped through generations to one place by local growers and climate alike, rather than by modern selection. Thai, Thai, Malawian and Mexican stock are the classic sativa examples. A landrace is a spread, not a single plant: within a pack the heights, finishing times and aromas range widely than in a tent-bred line, and this spread is the point of keeping one.
The trap is treating a landrace like a modern hybrid. It carries habits that made sense in an equatorial field, such as height no tent can contain and a flowering clock set to an equatorial daylength most growers never offer. “Heirloom” on a listing generally means a landrace that has been reproduced away from its origin for some generations, often with light selection towards indoor life; it is nearer to manageable but nonetheless not a hybrid. A seller listing “landrace” without an origin region and a generation count is using the word loosely, and the seeds should be priced with that in mind.
Latitude
The single number that determines if a sativa will ripen outdoors, and one that no pack states. Long-flowering plants need a run of shortening days to go on late enough to let the plant to ripen; at high latitudes the frost comes first, and the grower harvests an half-finished plant in late October or else watches it to mould in November. A further south, within a northern hemisphere, the later the window stretches, and coastal and low-latitude gardens can finish lines that northern gardens never will.
The practical rule for a seed listing: an “outdoor” line finishing date is given for the breeder’s home latitude, usually somewhere within temperate Europe or the west coast of the United States, and every degree north of that pushes the date back towards the weather. A grower north of roughly the fiftieth parallel that wants a true sativa in the garden is shopping for an autoflower or a covered space, and not a longer summer.
Sativa-dominant
A catalogue term rather than a measurable one. It usually indicates that the larger share of a hybrid’s parents were described as sativa by the breeder who drafted the description, and sometimes signals nothing more than a certain the flowers are longer or the smell sharper than the same breeder’s indica-labelled lines.
The effect people connect with a word, clear-headed rather than sedating, is governed more by terpene chemistry and the THC balance than by ancestry, and plenty of “sativa-dominant” hybrids deliver a heavy sleepy effect and a good number of the opposite lines do exactly the reverse. To a grower the percentage is useful for a loose guide to growth habit, flowering time and stretch; as a predictor to how it feels it is close to worthless without the aroma description.
Hermaphroditism in long-flowering lines
The appearance of pollen-bearing flowers on a female plant, typically late in flower and often under stress. Almost every cannabis population has some tendency for do; long-flowering plants express it more often, and the reason is a simple one: fourteen weeks of flower is fourteen weeks of exposure for a light leak, a temperature spike or a missed watering that can set it going, and a old that has already gone beyond its natural end often produces a few desperate male sacs on its own as a last attempt to make seed.
Not one of this makes a sativa line weak as a matter of nature; it means the grower’s consistency matter over longer. Light-tight room, steady conditions and cutting the moment the plant is done and not two weeks later take away most of the problem. A listing that states a breeder tests parents for intersex tendency is saying something more on a long-flowering line than for anything other category.
Stretch
The burst of upward growth which comes after the change to flowering. Indica-leaning plants gain half their height again; sativas commonly double, and a few equatorial types triple. The stretch lasts three to five weeks and cannot be stopped once it has started, only redirected by training.
In tent terms, the stretch figure is a fact worth read before deciding when to flip. A sativa flipped at sixty centimetres in a standard tent is at the lamp by week four of flower; one switched at thirty centimetres has room. People coming from indica strains almost always flip far too late the first time, and the consequence is written on the ceiling of the tent.
Foxtailing (and when it is not a fault)
The tendency of certain flowers to grow new bud clusters on top of old ones, producing towered, irregular buds instead of dense ones. In the majority of indica-leaning lines it is a heat symptom, typically from light that is too close or temperatures too high, and the advice is to fix the cause.
In a good number of sativas, above all Thai and some Haze lines, it is built in and is going to occur under a perfect room. A new sativa grower frequently spends weeks chasing a fault that is there, dropping lights and temperatures only slowing a long flower further. The listing rarely says which type you should expect; the lineage generally does.
Haze
In its first sense a specific family of plants put together in 1970s California from Mexican, Colombian and Thai parents, and later preserved and refined in the Netherlands. A true Haze runs tall, branches openly, takes for twelve to sixteen weeks and carries a scent of spice, pine and something metallic that no other other line exactly has.
In its second sense “Haze” is whatever cross that carries some of that family, which by now is a great many of the sativa-leaning catalogue. A listing that reads “Haze” and gives no parents may be mostly percent original old family or one sixteenth of it, and the grow time tracks the fraction, not the name. The useful question is never “is it a Haze” but “how much, and via which parent”.
Terpinolene (the “sativa smell”)
A terpene present in large amounts in many classic sativa lines and responsible for most of what people mean as a “sativa” aroma: fresh, piney, citrus and faintly sweet all at once. It is fragile, lost quickly through fast drying, and it degrades more quickly during storage than the earthier terpenes that lead indica-leaning stock.
For a seed buyer the word does two jobs. Where a listing names terpinolene among the lead aromas, the strain probably has real Haze-era ancestry whatever the label claims. And where the you wants that smell to still be there by the jar, the cure has to be slow and cool; a fast drying room turns a terpinolene line into something that smells of very little and nothing of what the pack described.
Equatorial
Describes plants out of latitudes in which daylength barely varies across the year, which means where the plant never evolved a strong response to shortening days. These lines frequently flower reluctantly under a conventional twelve-hour light cycle, since twelve hours is, to them, a mild unremarkable day rather than a signal.
The working response, handed around among sativa growers for decades, is to shorten the light more: eleven hours, sometimes ten, especially during the final weeks. It loses a yield yield and buys a more decisive finish. A listing that uses “equatorial” is warning you this in one word, and a grower that takes it as mere origin misses the point hidden in it.
