Sativa seeds arrive with more jargon attached than any other kind of cannabis seed, and a good deal of it says one thing to a botanist, another to a seed company and something different again to the grower standing in front of the pack. The disappointing sativa grow nearly always goes back to a word that was understood in the wrong sense: a flowering time read as a promise, a “sativa-dominant” label read as a description 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 runs strongly towards the classic end of the category and that is where the vocabulary carry the most weight most; the meanings themselves hold to any sativa seed from any shop. They are given in no particular order, because none of them is sense without the others.
Haze (the family, not the smell)
Originally a particular line of plants bred in coastal California from Mexican, Thai and South Indian parents, and later kept and worked in the Netherlands. The Haze grows tall, branches openly, flowers for twelve to sixteen weeks and carries a scent of incense, citrus and a note metallic that no line exactly has.
In its second sense “Haze” is whatever hybrid that carries a share of that family, which by now is most of the sativa-leaning catalogue. A listing which says “Haze” without lineage may be eighty percent the old family or a small fraction of it, and the flowering character follows the share, not the name. The working question is not “is it a Haze” but “how much, and through which parent”.
Latitude (outdoor sativas)
The one figure that determines if a sativa can ripen outdoors, and one no pack prints. Equatorial plants need the run of shortening days to continue late enough to let the plant finish; in northern latitudes the frost comes before that, and the grower cuts an unripe plant in the end of October or else watches it to mould in November. A closer south, in a northern hemisphere, the later the window stretches, and Mediterranean and subtropical gardens can ripen lines that northern growers cannot.
The practical rule of a seed listing: an “outdoor” line finishing date is given for the breeder’s home latitude, usually a point in temperate Europe or the western United States, and every degree north of it pushes the date back towards the weather. A grower north of roughly the fiftieth parallel who wants a true sativa outdoors needs to be looking for an autoflower or else a greenhouse, and not a better summer.
Landrace
A population of plants adapted over generations to one region by the local climate and growers together, and not by deliberate selection. Thai, Colombian, Congolese and Mexican lines are the sativa cases. A landrace is a spread, 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 point of keeping one.
The mistake is treating a landrace like a finished product. It brings habits that make sense in an equatorial field, including a frame that no tent can hold and a flowering clock tuned to a equatorial daylength most growers never offer. “Heirloom” in a listing usually means a landrace that has been grown out away from its origin for a number of generations, often with a degree of selection for indoor life; it is nearer to usable but still not uniform. A shop offering “landrace” that does not give an origin point and a generation history is applying the word loosely, and the pack should be priced with that in mind.
Equatorial (the twelve-hour problem)
Describes lines from latitudes in which daylength barely varies across the year, and that the plant does not evolved a strong reaction to shortening days. Such plants frequently start flowering slowly at a conventional twelve-hour light cycle, since twelve hours is, for them, an ordinary day and not a signal.
The working response, passed down between sativa growers over decades, is to cut the light more: eleven hours, sometimes ten, especially in the last weeks. It loses some yield yield and buys a more clearer finish. A listing that uses “equatorial” is warning you this with one word, and a grower who takes it as a note on origin misses the point hidden in it.
Stretch (the doubling)
The burst of vertical growth which comes after the switch to flowering. Most tent-bred plants gain around half their height again; sativas routinely double, and a few equatorial types triple. The stretch continues three to five weeks and will not be stopped after it begins, only redirected by training.
In practical terms, a stretch figure is the fact worth reading ahead of deciding when to flip. A sativa switched at sixty centimetres in a standard tent is at the lamp by week four of flower; one switched at thirty centimetres has room. People moving from indica strains almost always switch too late the first time, and the lesson is visible on the ceiling of the tent.
Intersex tendency
The production of pollen-bearing flowers on a female plant, usually towards the end in flower and often under stress. Almost every cannabis line carries a degree of capacity to it; long-flowering plants show it more often, and the reason is one plain reason: fourteen weeks of flower is fourteen weeks of opportunity for a timer leak, a heat spike or a late watering that can set it going, and an old plant has gone beyond its intended end often throws a few late male sacs on its own as a final effort to make seed.
Not one of these makes a sativa line unstable as a matter of nature; it makes the grower’s discipline matter for a longer stretch. Light-tight tents, steady temperatures and cutting the moment the plant is ready rather than a week later remove most of the problem. A listing that mentions the breeder tests parents for intersex tendency is saying something worth hearing for a long-flowering line than for anything other category.
Sativa-dominant
A marketing category rather than a measurable one. It usually means that the larger share of a hybrid’s lineage are classed as sativa by the breeder who wrote the listing, which occasionally means no more than that the buds are longer or the aroma sharper than the same breeder’s other releases.
The experience people associate with a word, clear-headed rather than heavy, is governed far more by terpene profile and by THC content than it is by the sativa fraction, and plenty of “sativa-dominant” hybrids produce a flat sleepy effect while a good number of the opposite lines do the opposite. To a buyer the label is worth something for a rough hint to growth habit, flowering time and stretch; as a guide to effect it is close to worthless without the terpene notes.
Flowering time (and what it is counted from)
The number of weeks from the start of flowering and harvest, which is the one most frequently misunderstood number on a sativa pack. For photoperiod seed it is counted from the day the light drops to twelve hours, rather than from sowing, so a “fourteen-week” sativa started after a ordinary vegetative stage is a five-month plant. Breeders additionally give the optimistic end of a spread, since the other end moves fewer seed.
Long-flowering plants take everywhere from ten weeks to more than twenty, and the longest strain in the Haze Sativa Seeds range is at around 16 weeks from the switch. The catalogue can be filtered by this number, which is a sensible first step if you have a room on a fixed timetable. A grower who allows four weeks to whatever the pack says is seldom disappointed.
Foxtailing (and when it is not a fault)
The tendency of some flowers to grow new calyx clusters on top of old ones, producing spired, open buds rather than round ones. In most tent-bred lines it is a heat symptom, usually from light too close or a room too high, and the standard response is to fix the room.
In many sativas, above all Southeast Asian and some Haze lines, it is genetic and will occur under a perfect room. A first-time sativa grower frequently spends a month chasing a fault that was never not a problem, dropping lights and temperatures only delaying an already slow flower even more. The breeder seldom says which kind you should expect; the lineage generally tells you.
Terpinolene (the “sativa smell”)
A aromatic compound found in high amounts in a lot of old sativa lines and accounting for most of the thing growers describe as a “sativa” smell: green, woody, lemon and faintly sweet at once. It is volatile, driven off easily by hot drying, and it degrades faster during the cure than the earthier terpenes that lead most tent lines.
To a seed buyer the name does two jobs. When a listing lists terpinolene among the lead aromas, the line probably has real Haze-era genetics regardless of what the percentage claims. And where the you are after that profile to survive to the jar, the cure has to be slow and cool; a fast dry flattens a terpinolene sativa into something that smells of very little and no trace of what the pack promised.