Sativa seeds arrive with more jargon attached than any other category of cannabis seed, and a good deal of it means one thing to a botanist, something else to a seed company and a third to the person trying to make a decision 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 modern hybrid. The entries below were put together with the range at https://hazesativaseeds.com open as the concrete examples, because it leans heavily to the classic end of the category and that is where the vocabulary matter most; the definitions though hold to any sativa seed from any shop. They are in no particular order, since none of them is sense on its own without the others.
Equatorial
Refers to plants out of latitudes in which daylength hardly changes across the year, which means that the plant never evolved a strong reaction to changing days. Such plants frequently start flowering reluctantly at a standard twelve-hour schedule, because twelve hours is, to them, a mild ordinary day and not a signal.
The practical fix, passed down among sativa growers over decades, is to shorten the light further: eleven hours, occasionally ten, particularly during the last weeks. It loses some yield yield and buys a earlier clearer finish. A listing which uses “equatorial” is telling you this in one word, and a grower that reads it as a note on geography misses the point inside it.
Foxtailing (and when it is not a fault)
The tendency of certain flowers to push out new bud clusters on top of old ones, producing spired, irregular buds rather than dense ones. In most tent-bred lines it is a heat symptom, usually caused by light that is too close or temperatures too high, and the advice is to correct the cause.
In a good number of sativas, especially Southeast Asian and some Haze lines, it is genetic and is going to happen under a perfect room. A first-time sativa grower frequently wastes weeks hunting a fault that was never not a problem, lowering lights and temperatures and slowing a long flower further. The listing rarely warns which type you should expect; the parentage usually does.
Stretch
The burst of upward growth which follows the switch to flowering. Indica-leaning plants add around half their height again; sativas routinely double, and a few landrace types go further. The stretch lasts two to five weeks and will not be halted after it begins, only redirected by training.
In tent terms, a stretch figure is the fact to read before choosing when to flip. A sativa switched at sixty centimetres centimetres inside a standard tent is touching the lamp before week four of flower; one flipped at thirty centimetres centimetres has room. People moving from indica stock almost always switch too late the first time, and the lesson is written on the ceiling of the tent.
Flowering time
The figure of weeks from the start of flowering and maturity, and the single most misread figure on a sativa pack. With photoperiod seed it is counted from the day the light is cut to twelve hours, rather than from sowing, so a “fourteen-week” sativa grown with an eight-week vegetative stage is a twenty-two-week plant. Breeders also quote the optimistic end of a range, since the other end sells less seed.
Sativa plants take anywhere from ten weeks to more than twenty, and the longest line in the Haze Sativa Seeds range comes in at about 16 weeks from the flip. The catalogue can be filtered by this figure, which is the reasonable first pass for a room with a tight timetable. A grower who adds four weeks on top of whatever the pack says is seldom caught out.
Latitude
The single figure that decides if a sativa will finish outdoors, and one that no pack states. Equatorial plants need a run of shortening days to continue late enough to let the plant finish; at high latitudes the frost arrives before that, and the grower cuts an unripe plant in late October or else watches it to mould in November. The further to the equator, in a northern hemisphere, the longer the season runs, and coastal or subtropical growers can ripen plants that temperate gardens cannot.
The practical rule for a seed pack: an “outdoor” line harvest date is given for the breeder’s home latitude, usually a point within temperate Europe or the west coast of the United States, and every step north of it moves the finish later into the weather. A grower north of about the fiftieth parallel who wants a true sativa outdoors is shopping for an autoflower or else a greenhouse, and not a longer summer.
Terpinolene
A aromatic compound present in high proportion in a lot of old sativa lines and accounting for most of what growers describe as a “sativa” aroma: fresh, woody, lemon and faintly floral at once. It is volatile, driven off quickly by fast drying, and terpinolene degrades faster during storage than the earthier terpenes which dominate most tent lines.
For a seed buyer the name earns two jobs. When a listing lists terpinolene as the leading aromas, the line probably carries real Haze-era ancestry whatever the percentage claims. And where the you are after that profile to still be there by the jar, the drying has to be slow and slow; a warm dry turns a terpinolene line to a flower that smells of hay and nothing of what the pack promised.
Sativa-dominant (the label)
A marketing term rather than a botanical one. The phrase generally means that more of a hybrid’s lineage were described as sativa by whoever wrote the description, and sometimes signals nothing more than a certain the buds are airier or the aroma brighter than the same breeder’s indica-labelled releases.
The experience people associate with the word, clear-headed rather than sedating, is driven more by terpene chemistry and the THC balance than it is by ancestry, and plenty of “sativa-dominant” releases deliver a heavy sleepy result and a good number of indica-labelled lines deliver the reverse. For a buyer the percentage is useful as a loose guide to growth habit, flowering time and stretch; for a guide to how it feels it is next to worthless unless accompanied by the aroma notes.
Hermaphroditism in long-flowering lines
The production of male flowers on a female plant, typically late in flower and frequently under stress. Almost every cannabis line carries some capacity to it; long-flowering lines express it more often, for one plain one: fourteen weeks of flower is fourteen weeks of opportunity for a timer leak, a heat spike or a late watering to set it going, and a old plant has gone past its natural end often produces a few late male sacs on its own in a last effort to set seed.
None of these means a sativa strain weak by nature; it makes the grower’s discipline count over a longer stretch. A sealed room, stable conditions and cutting the moment the plant is ready rather than two week later remove the greater part of the risk. A listing which states the breeder tests parents for hermaphrodite tendency is worth worth hearing on a sativa than for anything other category.
Landrace versus heirloom
A population of plants adapted over centuries to one region by local climate and climate alike, and not by deliberate selection. Thai, Thai, Congolese and Mexican stock are the classic sativa examples. A landrace is a spread, not a one plant: inside a pack the heights, finishing times and aromas range far more than a tent-bred line, and this spread is the whole value of keeping one.
The mistake is treating a landrace as a finished product. It brings traits that make sense in an open field, including a frame that no tent can hold and a flowering rhythm set to a equatorial daylength most growers cannot offer. “Heirloom” on a listing usually means a landrace that has been grown out away from its origin for a number of generations, typically with light selection towards indoor conditions; it is nearer to usable but still not uniform. A seller listing “landrace” without an collection point and a reproduction history is applying the word loosely, and the seeds should be judged with that in mind.