Sativa seeds arrive with more vocabulary attached than any other category of cannabis seed, and a good deal of it says one thing to a botanist, something else to a breeder and a third to the grower trying to make a decision in front of the pack. The disappointing sativa grow nearly always 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 description of character, 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 spectrum and that is where the vocabulary matter most; the definitions though hold to any sativa seed from any shop. They are in no special order, since none of them makes sense without the others.
Flowering time (and what it is counted from)
The figure of weeks between the start of flowering and harvest, which is the one most misunderstood figure on a sativa pack. For photoperiod seed it is counted from the day the light drops to twelve hours, not from sowing, so a “fourteen-week” sativa started with an ordinary vegetative period is a five-month plant. Breeders also give the optimistic end of a range, because the other end moves fewer seed.
Long-flowering lines take anywhere from ten weeks to more than twenty, and the slowest line in the Haze Sativa Seeds range is at around 16 weeks from the switch. The catalogue can be sorted by this figure, which is a sensible first pass for a room with a tight timetable. A grower who adds four weeks on top of whatever the pack states is rarely caught out.
Latitude
The one number that determines if a sativa will ripen outdoors, and one no pack states. Equatorial plants require the run of shortening days to go on long enough to let the plant to finish; in northern latitudes the frost arrives first, and the grower harvests a half-finished plant in late October or else loses it to mould in November. A further south, within the northern hemisphere, the longer the window stretches, and Mediterranean or low-latitude gardens can finish lines that temperate growers cannot.
The usable reading of a seed pack: an “outdoor” line finishing month is stated for the breeder’s home latitude, usually somewhere within temperate Europe or the west coast of the United States, and each degree north of that pushes the date back towards the weather. A grower above about the fiftieth parallel that wants a long-flowering sativa in the garden is shopping for a sativa autoflower or else a greenhouse, and not a better season.
Haze
In its first sense a specific line of plants put together in 1970s California from Mexican, Colombian and Thai landraces, and then preserved and refined in the Netherlands. The Haze grows tall, fills out sparsely, takes for twelve sixteen weeks and carries a scent of spice, citrus and something sharp that no other line exactly has.
In its second sense “Haze” is whatever cross which carries a share of that family, which today is most of the sativa-leaning market. A listing that says “Haze” without lineage may be mostly percent original classic family or a small fraction of it, and the grow time follows the share, not the name. The useful question is never “is it a Haze” but “how much, and via which parent”.
Foxtailing
The tendency of some flowers to push out new bud growth on top of existing ones, producing towered, open buds instead of round ones. In the majority of tent-bred lines it is a stress response, typically from light too close or a room too high, and the standard response is to correct the room.
In many sativas, above all Southeast Asian and some Haze hybrids, it is built in and will occur in a flawless room. A first-time sativa grower often wastes a month chasing a fault that was never not there, dropping lights and temperatures and slowing an already slow flower even more. The listing rarely says which kind you should expect; the lineage generally does.
Stretch (the doubling)
The burst of upward growth that follows the switch to flowering. Most tent-bred plants add half their height again; sativas commonly double, and some landrace lines go further. The stretch continues two to five weeks and cannot be stopped once it begins, merely redirected by training.
In practical terms, the stretch multiplier is the fact to reading before choosing when to flip. A sativa switched at sixty centimetres inside a standard tent is at the lamp before week four of flower; one switched at thirty centimetres centimetres has room. Growers coming over from indica stock almost always switch far too late the first time, and the lesson is written on the ceiling of the tent.
Equatorial (the twelve-hour problem)
Refers to plants out of latitudes where daylength hardly changes across the year, and that the plant never evolved a sharp response to changing days. Such lines frequently start flowering reluctantly under a conventional twelve-hour schedule, since twelve hours is, to them, a mild unremarkable day and not a signal.
The working response, passed around among sativa growers for decades, is to shorten the light more: eleven hours, sometimes ten, particularly during the last weeks. It costs a little yield and buys an earlier decisive end. A listing that says “equatorial” is warning you about this in one word, and a grower that takes it as a note on geography misses the point hidden in it.
Terpinolene
A aromatic compound found in large amounts in a lot of classic sativa strains and responsible for most of what growers describe as a “sativa” smell: green, piney, citrus and faintly floral all at once. It is volatile, driven off quickly through fast drying, and terpinolene degrades more quickly during storage than the earthier terpenes which dominate most tent lines.
To a seed buyer the name earns two things. Where a listing lists terpinolene as the leading aromas, the line probably has real old-sativa ancestry regardless of what the label claims. And when the grower are after that profile to still be there by the jar, the drying is going to be cool and cool; a fast dry flattens a terpinolene sativa to something that smells of very little and no trace of what the pack described.
Intersex tendency
The production of pollen-bearing flowers on a female plant, usually late in flower and often under stress. Almost every cannabis line carries a degree of tendency for it; long-flowering plants show it more often, for one simple one: fourteen weeks of flower is sixteen weeks of exposure for a light leak, a heat spike or a missed watering that can trigger it off, and a plant plant has gone beyond its natural end frequently produces a few desperate pollen sacs on its own in a last effort to make seed.
Not one of these means a sativa line unstable as a matter of course; it means the grower’s discipline matter over longer. A sealed tents, stable conditions and harvesting the moment the plant is ready rather than two week after remove the greater part of the problem. A listing that states a breeder tests parents for intersex tendency is worth more for a long-flowering line than on any else.
Landrace
A population of plants adapted through generations to a particular place by the local growers and climate alike, rather than by deliberate selection. Thai, Colombian, Malawian and Mexican stock are the sativa examples. A landrace is variable, not a single plant: within a pack the flowering times, finishing times and aromas spread far more than in any tent-bred line, and this spread is the whole value of growing one.
The mistake is treating a landrace like a finished hybrid. It carries habits that made sense in an open field, such as a frame that no tent can hold and a flowering rhythm set to an daylength the majority of growers cannot provide. “Heirloom” in a listing generally refers to a landrace that has been grown out somewhere over a number of generations, typically with a degree of selection for indoor conditions; it is closer to manageable but still far from a hybrid. A shop offering “landrace” without a origin point and a generation history is using the word as a flavour, and the seeds should be judged with that in mind.
Sativa-dominant
The marketing term and not a measurable one. The phrase generally means that more of a hybrid’s lineage are described as sativa by whoever wrote the description, and sometimes means no more than that the flowers are airier or the aroma sharper than the same breeder’s indica-labelled releases.
The effect people associate with a word, lively rather than heavy, is driven far more by terpene profile and the THC balance than by the sativa fraction, and plenty of “sativa-dominant” hybrids produce a flat couch result while a good number of indica-labelled stock do exactly the reverse. To a buyer the label is worth something as a rough guide to growth habit, flowering time and stretch; for a predictor to effect it is next to useless unless accompanied by the aroma description.
