Sativa seeds come with more jargon attached than any other kind of cannabis seed, and most of it says one thing to a botanist, another to a seed company and something different again to the person trying to make a decision in front of the pack. A disappointing sativa grow usually goes back to a word that was understood 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 like it were a tent-bred hybrid. The entries below were put together with the range at https://hazesativaseeds.com open for reference, since it runs strongly towards the classic end of the category where the words matter most; the definitions though apply to any sativa seed from any shop. They are in no particular order, because not one of them makes sense on its own without the others.
Landrace versus heirloom
A population of plants adapted over centuries to a particular region by local climate and climate alike, rather than by modern selection. Thai, Colombian, Congolese and Oaxacan lines are the classic sativa examples. A landrace is variable, not a one plant: inside a pack the heights, finishing times and smells spread far more than in a tent-bred hybrid, and that variation is the point of keeping one.
The trap is buying a landrace like a finished product. It carries traits that made sense in an open field, such as a frame that no tent can contain and a flowering clock tuned to a daylength the majority of growers never offer. “Heirloom” in a listing usually means a landrace that has been reproduced somewhere over some generations, typically with a degree of selection towards indoor life; it is nearer to manageable but nonetheless not a hybrid. A seller listing “landrace” without a origin point and a generation count is using the word as a flavour, and the seeds should be priced with that in mind.
Terpinolene
A terpene found in high amounts in many classic sativa strains and accounting for much of what growers describe as a “sativa” smell: fresh, woody, citrus and faintly sweet all at once. It is volatile, driven off quickly through hot drying, and it degrades faster during the cure than the heavier terpenes that dominate most tent lines.
To a seed buyer the name does two things. Where a listing names terpinolene among the leading aromas, the line most likely has real old-sativa ancestry whatever the percentage says. And when the grower wants that profile to still be there by the jar, the cure has to be cool and slow; a fast drying room turns a terpinolene line into a flower that smells of hay and nothing of what the pack promised.
Latitude (outdoor sativas)
The single figure that decides if a sativa will ripen outdoors, and one no pack prints. Long-flowering lines require a autumn days to continue late enough for the plant finish; in northern latitudes the frost arrives first, and the grower harvests an unripe plant in late October or loses it rot in November. The further to the equator, within the northern hemisphere, the later the season runs, and coastal and low-latitude gardens are able to ripen plants that northern growers never will.
The practical reading of a seed pack: an “outdoor” line harvest month is given for the breeder’s own latitude, normally a point in temperate Europe or the western United States, and every step further north of that moves the finish later towards the weather. A grower north of roughly the fiftieth parallel that is after a true sativa in the garden is looking for an autoflower or a greenhouse, and not a longer season.
Stretch (the doubling)
The burst of vertical growth that follows the switch to flowering. Indica-leaning plants gain around half again; sativas routinely double, and a few equatorial lines go further. The stretch lasts two to four weeks and will not be halted after it begins, merely bent sideways by training.
In practical terms, the stretch figure is the fact to read ahead of choosing when to flip. A sativa switched at sixty centimetres centimetres inside a standard tent is at the lamp by week four of flower; one flipped at thirty centimetres has room. Growers coming from indica strains nearly always switch too late the first time, and the consequence is written on the ceiling of the tent.
Haze (the family, not the smell)
Originally a specific family of plants put together in coastal California from Mexican, Colombian and Thai landraces, and later kept and worked in the Netherlands. The Haze runs tall, branches sparsely, takes for twelve sixteen weeks and carries a scent of incense, pine and something sharp that no other line quite has.
In its second sense “Haze” is whatever hybrid which carries a share of that family, and by now is most of the sativa-leaning catalogue. A listing that says “Haze” without parents could be eighty percent original old family or one small fraction of it, and the flowering time tracks the fraction, not the name. The useful question is never “is it a Haze” but “how much, and via which parent”.
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 lines it is a heat response, usually caused by light too close or a room that is too high, and the advice is to correct the room.
In many sativas, especially Thai and some Haze lines, it is genetic and is going to occur in a perfect room. A new sativa grower often spends weeks hunting a problem that was never not a problem, lowering lights and temperatures and slowing a long flower even more. The breeder seldom says which kind to expect; the lineage generally tells you.
Sativa-dominant
The catalogue term and not a measurable one. It generally means that more of a hybrid’s lineage were described as sativa by whoever drafted the listing, which sometimes signals nothing more than a certain the flowers are longer or the aroma sharper than the that breeder’s other lines.
The experience people associate with a word, lively instead of sedating, is governed far more by terpene profile and by cannabinoid balance than it is by ancestry, and plenty of “sativa-dominant” releases produce a heavy couch effect and plenty of indica-labelled stock deliver exactly the opposite. For a grower the percentage is useful as a loose guide to growth habit, flowering time and stretch; as a guide to how it feels it is close to useless without the terpene notes.
Equatorial
Refers to lines from regions where daylength hardly varies through the year, and that the plant does not develop a sharp response to changing days. Such lines frequently start flowering reluctantly at a standard twelve-hour light cycle, because twelve hours is, for them, a mild unremarkable day and not a signal.
The working fix, handed around between sativa growers over decades, is to shorten the light more: eleven hours, occasionally ten, particularly during the last weeks. It loses some little yield and gains an more decisive finish. A listing which uses “equatorial” is telling you this with one word, and a grower who reads it as mere origin misses the point hidden in it.
Flowering time
The number of weeks between the start of flowering and harvest, and the one most frequently 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 an ordinary vegetative period is a twenty-two-week plant. Seed companies also give the optimistic end of the range, because the other end moves fewer seed.
Long-flowering plants run everywhere from ten weeks to more than twenty, and the longest line in the Haze Sativa Seeds range comes in at around 16 weeks from the switch. The catalogue can be filtered by that number, which is the sensible first step for a grower with a fixed schedule. A grower who allows four weeks on top of the figure the pack states is rarely disappointed.
