Sativa seeds arrive with more vocabulary attached than any other category of cannabis seed, and most of it says one thing to a botanist, another to a seed company and a third to the grower standing in front of the pack. The failed sativa grow usually traces back to a word that was understood in the wrong one of those senses: a flowering time read as a promise, a “sativa-dominant” label read as a statement 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 for the concrete examples, since it runs heavily towards the long-flowering end of the spectrum where the vocabulary matter most; the definitions themselves apply to any sativa seed from any shop. They are in no particular order, since not one of them makes usable without the others.
Terpinolene
A aromatic compound present in high amounts in many classic sativa lines and accounting for most of what people describe as a “sativa” smell: green, piney, lemon and faintly sweet all at once. It is fragile, lost easily through hot drying, and it degrades faster during storage than the heavier terpenes that dominate indica-leaning lines.
For a seed buyer the word does two things. Where a listing names terpinolene as the lead terpene, the strain probably has substantial Haze-era ancestry whatever the label says. And where the grower wants that profile to still be there by the jar, the cure has to be slow and cool; a warm drying room turns a terpinolene line into a flower that smells of hay and leaves nothing of what the pack promised.
Intersex tendency
The appearance of pollen-bearing flowers on a female plant, typically towards the end in flower and often under stress. Almost every cannabis population has a degree of capacity for do; sativa plants show it more, and the reason is one simple reason: fourteen weeks of flower is fourteen weeks of opportunity for a timer leak, a temperature spike or a missed watering that can trigger it off, and an plant plant has gone past its intended end often throws a few late pollen sacs on its own as a final effort to make seed.
Not one of these makes a sativa line weak as a matter of nature; it makes the grower’s discipline count over a longer stretch. Light-tight tents, steady conditions and cutting the moment the plant is done and not two weeks after remove most of the problem. A listing that states the breeder screens parents for hermaphrodite traits is saying something more on a long-flowering line than for anything other category.
Foxtailing (and when it is not a fault)
The habit of some flowers to push out new calyx growth on top of old ones, giving towered, irregular buds rather than dense ones. In most tent-bred strains it is a stress symptom, typically caused by light that is too close or temperatures too high, and the advice is to correct the cause.
In many sativas, especially Thai and certain Haze hybrids, it is built in and is going to happen under a flawless room. A first-time sativa grower often spends a month chasing a problem that is not there, dropping lights and temperatures and slowing a long flower even more. The breeder seldom says which type to expect; the lineage usually tells you.
Sativa-dominant (the label)
A marketing category and not a measurable one. The phrase usually indicates that more of a hybrid’s lineage are described as sativa according to the breeder who wrote the listing, and occasionally signals no more than that the buds are longer or the aroma sharper than the that breeder’s other releases.
The experience people associate with a word, lively rather than heavy, is governed more by terpene chemistry and by THC balance than it is by the sativa fraction, and plenty of “sativa-dominant” releases produce a flat sleepy result while plenty of the opposite stock deliver the reverse. For a grower the label is worth something for a loose hint to growth habit, flowering time and stretch; for a guide to how it feels it is next to worthless without the aroma description.
Equatorial
Refers to lines out of regions in which daylength hardly varies across the year, and that the plant does not develop a strong reaction to changing days. Such plants frequently start flowering reluctantly under a conventional twelve-hour schedule, since twelve hours is, to them, an unremarkable day and not a signal.
The working response, passed down between sativa growers for decades, is to cut the light further: eleven hours, sometimes ten, particularly during the last weeks. It loses some little yield and buys an earlier decisive finish. A listing which uses “equatorial” is telling you this with one word, and a grower who reads it as a note on geography misses the point inside it.
Landrace versus heirloom
A population of plants shaped over generations to one region by local climate and growers alike, rather than by deliberate breeding. Colombian, Thai, Congolese and Mexican stock are the classic sativa cases. A landrace is variable, rather than a one plant: within a pack the flowering times, flowering times and aromas spread far more than any tent-bred line, and that variation is the point of keeping one.
The trap is treating a landrace as a finished hybrid. It brings traits that make sense in an open field, such as height that no tent can contain and a flowering clock tuned to an daylength the majority of growers cannot provide. “Heirloom” in a listing generally means a landrace that has been reproduced away from its origin over some generations, often with light selection for tent conditions; it is nearer to manageable but still far from uniform. A shop listing “landrace” that does not give an collection point and a generation count is applying the word loosely, and the pack should be judged accordingly.
Stretch
The surge of upward growth that follows the switch to flowering. Most tent-bred plants add around half their height again; sativas commonly double, and a few equatorial lines go further. The stretch lasts two to five weeks and will not be stopped once it has started, only bent sideways by training.
In practical terms, a stretch figure is a fact worth read ahead of choosing when to flip. A sativa flipped at sixty centimetres centimetres in a standard tent is touching the lamp before week four of flower; one flipped at thirty centimetres has room. People moving over from indica stock almost always switch too late the first time, and the consequence is written on the ceiling of the tent.
Haze
Originally a particular line of plants put together in coastal California from Mexican, Colombian and Thai parents, and then kept and worked in the Netherlands. A true Haze grows tall, branches openly, takes for twelve to sixteen weeks and carries a scent of spice, pine and a note metallic that no other other line exactly reproduces.
In its second sense “Haze” is whatever hybrid that carries some of that family, and today is most of the sativa-leaning market. A listing that says “Haze” without parents may be eighty percent original classic family or a small fraction of it, and the flowering character follows the fraction, not the name. The useful question is never “is it a Haze” but “how much, and via which parent”.
Flowering time (and what it is counted from)
The figure of weeks between the start of flowering and maturity, and the one most misunderstood number on a sativa pack. With photoperiod seed it is measured from the day the light is cut to twelve hours, not from germination, so a “fourteen-week” sativa started after a eight-week vegetative stage is a twenty-two-week plant. Seed companies also quote the optimistic end of the spread, because the longer end moves fewer seed.
Long-flowering plants take everywhere from ten weeks to more than twenty, and the slowest strain in the Haze Sativa Seeds range comes in at around 16 weeks from the flip. The catalogue can be filtered by this number, which is the reasonable first step for a room with a fixed schedule. A grower who allows four weeks to whatever the pack states is seldom caught out.
Latitude
The single number that determines whether a sativa will finish outdoors, and a number that no pack states. Long-flowering plants require the autumn days to go on long enough to let the plant to ripen; at northern latitudes the frost arrives first, and the grower harvests a half-finished plant in the end of October or else watches it rot in November. A further to the equator, in a northern hemisphere, the later the window stretches, and coastal and subtropical growers can finish lines that temperate gardens cannot.
The usable rule for a seed listing: an “outdoor” line finishing month is given for the breeder’s home latitude, normally a point in temperate Europe or the western United States, and every degree further north of it pushes the date later into the weather. A grower north of roughly the fiftieth parallel who wants a long-flowering sativa in the garden is looking for an autoflower or else a covered space, and not a better season.