Sativa seeds arrive with more vocabulary around them than any other kind of cannabis seed, and a good deal of it means a certain thing to a botanist, another to a seed company and something different again to the person standing in front of the pack. A disappointing 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” tag taken as a description of effect, a landrace bought like it were a modern hybrid. The entries below were written with the range at https://hazesativaseeds.com to hand for the concrete examples, because it runs strongly to the classic end of the category and that is where the words carry the most weight most; the meanings though apply to any sativa seed from any seller. They are in no particular order, because not one of them makes sense without the rest.
Equatorial
Refers to lines out of latitudes where daylength barely varies across the year, and that the plant never develop a sharp reaction to shortening days. These plants often flower slowly under a standard twelve-hour light cycle, since twelve hours is, for them, an unremarkable day and not a signal.
The practical fix, handed down among sativa growers for decades, is to shorten the light more: eleven hours, sometimes ten, particularly in the final weeks. It loses some little yield and buys an more decisive end. A listing which says “equatorial” is telling you this with one word, and a grower that reads it as mere geography has missed the instruction hidden in it.
Flowering time
The figure of weeks from the start of flowering and harvest, which is the one most frequently misread figure on a sativa pack. With photoperiod seed it is measured from the day the light is cut to twelve hours, rather than from germination, so a “fourteen-week” sativa grown with a eight-week vegetative stage is a five-month plant. Breeders also quote the shorter end of a spread, because the longer end sells fewer seed.
Long-flowering lines run anywhere from ten weeks to more than twenty, and the longest strain in the Haze Sativa Seeds range is at around 16 weeks from the flip. The catalogue can be filtered by that figure, which is a sensible first pass for a room on a tight timetable. A grower who adds four weeks to whatever the pack says is rarely disappointed.
Haze (the family, not the smell)
In its first sense a particular family of plants bred in 1970s California from Mexican, Colombian and South Indian landraces, 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 incense, citrus and something metallic that no other line quite has.
In its second sense “Haze” is any cross which carries a share of that family, and by now is a great many of the sativa-leaning market. A listing that reads “Haze” without lineage may be mostly percent the old family or one small fraction of it, and the grow character tracks the share, not the name. The working question is not “is it a Haze” but “how much, and via which parent”.
Hermaphroditism in long-flowering lines
The appearance of pollen-bearing flowers on a female plant, typically towards the end in flower and frequently under stress. Every cannabis line carries some capacity for it; sativa lines express it more, for one plain one: fourteen weeks of flower is sixteen weeks of opportunity for a timer leak, a temperature spike or a late watering to set it going, and an old that has gone beyond its intended end frequently produces a few desperate pollen flowers on its own as a last effort to make seed.
Not one of this means a sativa strain unstable by nature; it makes the grower’s discipline matter for a longer stretch. A sealed room, steady temperatures and cutting the moment the plant is done and not a week later remove most of the problem. A listing which mentions a breeder screens parents for intersex tendency is worth worth hearing for a long-flowering line than on anything other category.
Stretch (the doubling)
The surge of upward growth which follows the switch to flowering. Most tent-bred plants add half again; sativas routinely double, and some equatorial lines triple. The stretch lasts three to five weeks and will not be halted after it has started, only redirected by training.
In practical terms, the stretch multiplier is a number worth reading ahead of deciding when to switch. A sativa flipped at sixty centimetres in a two-metre tent is at the lamp by week four of flower; one flipped at thirty centimetres centimetres has room. People moving over from indica strains almost always flip far too late the first time, and the lesson is written on the ceiling of the tent.
Landrace
A population of plants adapted through centuries to one place by local growers and climate together, and not by modern breeding. Thai, Thai, Congolese and Mexican stock are the classic sativa cases. A landrace is variable, rather than a single plant: inside a pack the flowering times, flowering times and smells spread widely than in any tent-bred line, and this variation is the whole value of keeping one.
The mistake is treating a landrace like a modern product. It brings traits that make sense in an open field, including a frame no tent can contain and a flowering rhythm tuned to an equatorial daylength most growers cannot provide. “Heirloom” on a listing usually means a landrace that has been reproduced away from its origin for some generations, often with light selection towards tent life; it is nearer to usable but still not uniform. A shop offering “landrace” that does not give an origin point and a generation count is using the word as a flavour, and the seeds should be priced with that in mind.
Foxtailing (and when it is not a fault)
The tendency of some flowers to push out new bud clusters on top of old ones, giving towered, open buds rather than dense ones. In most indica-leaning lines it is a heat response, typically from light that is too close or a room too high, and the standard response is to correct the cause.
In many sativas, above all Thai and some Haze hybrids, it is built in and will occur in a flawless room. A first-time sativa grower frequently wastes weeks hunting a problem that was never not there, lowering lights and temperatures and delaying a slow plant further. The listing seldom says which kind you should expect; the lineage usually tells you.
Sativa-dominant
A catalogue category and not a botanical one. The phrase usually means that more of a hybrid’s lineage were classed as sativa according to whoever wrote the listing, which occasionally signals nothing more than that the buds are longer or the smell sharper than the that breeder’s indica-labelled lines.
The experience people associate with a word, clear-headed rather than sedating, is governed more by terpene profile and the cannabinoid content than it is by the sativa fraction, and plenty of “sativa-dominant” hybrids produce a flat couch effect while plenty of indica-labelled lines deliver the reverse. To a grower the label is useful for a loose guide to growth habit, flowering time and stretch; as a guide to effect it is next to worthless without the aroma description.
Latitude (outdoor sativas)
The single number that determines if a sativa will ripen outdoors, and one that no pack states. Equatorial lines need a autumn days to continue long enough to let the plant to ripen; in high latitudes the frost comes before that, and the grower harvests an unripe plant in late October or else loses it rot in November. A further south, within the northern hemisphere, the later the season stretches, and Mediterranean or subtropical gardens can ripen lines that temperate growers cannot.
The practical rule of a seed listing: an “outdoor” sativa finishing month is stated for the breeder’s home latitude, usually somewhere within southern Europe or the west coast of the United States, and every step north of it moves the date back towards the frost. A grower north of roughly the fiftieth parallel that is after a long-flowering sativa in the garden is shopping for an autoflower or else a greenhouse, and not a longer season.
Terpinolene (the “sativa smell”)
A terpene found in high proportion in many classic sativa strains and accounting for most of what growers mean as a “sativa” aroma: fresh, piney, lemon and slightly floral all at once. It is fragile, driven off quickly by hot drying, and terpinolene fades faster in the cure than the earthier terpenes which lead indica-leaning stock.
For a seed buyer the word does two jobs. Where a listing names terpinolene as the lead terpene, the line most likely has real Haze-era genetics regardless of what the label claims. And when the you are after that profile to survive to the jar, the drying has to be cool and slow; a warm drying room turns a terpinolene sativa to something that tastes of hay and leaves no trace of what the pack described.