Sativa seeds arrive with more jargon around them 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 something different again to the person standing in front of the listing. A disappointing sativa grow nearly always goes back to a word that was read in the wrong one of those senses: a flowering time taken as a promise, a “sativa-dominant” label taken as a description of effect, a landrace bought like it were a tent-bred hybrid. The entries below are written with the range at https://hazesativaseeds.com to hand for the concrete examples, because it leans heavily to the long-flowering end of the spectrum where the vocabulary carry the most weight most; the definitions themselves hold to any sativa seed from any seller. They are given in no particular order, because none of them makes sense without the rest.
Flowering time (and what it is counted from)
The figure of weeks from the start of flowering and harvest, and the one most frequently misread number on a sativa pack. For photoperiod seed it is measured from the day the light is cut to twelve hours, not from germination, so a “fourteen-week” sativa started with a eight-week vegetative stage is a five-month plant. Breeders also give the optimistic end of a spread, since the longer end sells less seed.
Long-flowering lines run anywhere from ten weeks to well over twenty, and the slowest line in the Haze Sativa Seeds range is at around 16 weeks from the flip. The catalogue can be filtered by this figure, which is a reasonable first step if you have a room with a fixed timetable. A grower who adds four weeks to whatever the pack says is seldom disappointed.
Sativa-dominant
The marketing category rather than a measurable one. The phrase usually indicates that the larger share of a hybrid’s parents are classed as sativa by the breeder who drafted the listing, and occasionally means nothing more than a certain the buds are airier or the aroma sharper than the that breeder’s other lines.
The experience people connect with the word, clear-headed rather than sedating, is governed more by terpene chemistry and by cannabinoid balance than by ancestry, and a good number of “sativa-dominant” releases produce a flat sleepy effect and plenty of indica-labelled stock do the opposite. For a buyer the percentage is worth something as a loose guide to growth habit, flowering time and stretch; as a guide to how it feels it is next to useless without the aroma description.
Equatorial (the twelve-hour problem)
Refers to lines from regions where daylength hardly varies through the year, which means where the plant never evolved a strong reaction to changing days. These lines often start flowering reluctantly at a standard twelve-hour schedule, since twelve hours is, for them, a mild unremarkable day rather than a signal.
The working response, handed around among sativa growers over decades, is to shorten the light further: eleven hours, sometimes ten, particularly during the final weeks. It costs some yield yield and gains a more decisive end. A listing that says “equatorial” is telling you this in one word, and a grower who takes it as mere origin has missed the point hidden in it.
Foxtailing
The tendency of certain flowers to push out fresh bud growth on top of old ones, giving spired, open buds instead of round ones. In most tent-bred strains it is a stress symptom, usually from light too close or temperatures that is too high, and the advice is to fix the room.
In a good number of sativas, especially Southeast Asian and certain Haze hybrids, it is built in and is going to occur in a flawless room. A new sativa grower frequently wastes a month chasing a problem that is not there, lowering lights and temperatures only delaying an already slow plant further. The listing rarely says which type you should expect; the lineage usually tells you.
Haze
In its first sense a specific line of plants bred in 1970s California from Mexican, Colombian and Thai landraces, and later kept and refined in the Netherlands. The Haze grows tall, fills out openly, flowers for twelve to sixteen weeks and smells of spice, pine and a note sharp that no other line quite reproduces.
In its second sense “Haze” is any cross which contains some of that family, which by now is a great many of the sativa-leaning catalogue. A listing which reads “Haze” and gives no lineage may be eighty percent the old family or one sixteenth of it, and the grow character tracks the share, not the name. The useful question is never “is it a Haze” but “how much, and via which parent”.
Terpinolene
A aromatic compound present in large proportion in many classic sativa lines and accounting for much of what growers mean as the “sativa” smell: green, woody, citrus and slightly sweet at once. It is volatile, driven off easily by fast drying, and it fades faster during the cure than the earthier terpenes that lead most tent stock.
To a seed buyer the name does two jobs. When a listing names terpinolene among the lead aromas, the strain probably carries real Haze-era ancestry regardless of what the percentage says. And when the you are after that smell to survive to the jar, the cure is going to be slow and cool; a fast dry flattens a terpinolene sativa into a flower that smells of hay and leaves no trace of what the pack described.
Hermaphroditism in long-flowering lines
The appearance of pollen-bearing flowers on a female plant, typically late in flower and often in response to stress. Every cannabis line carries a degree of tendency to do; long-flowering lines show it more often, for a plain reason: sixteen weeks of flower is sixteen weeks of exposure for a timer leak, a temperature spike or a missed watering that can set it off, and a plant plant has already waited beyond its intended finish often produces a few desperate male sacs on its own as a last effort to set seed.
None of these means a sativa strain unstable as a matter of nature; it makes the grower’s discipline count for a longer stretch. Light-tight room, steady conditions and harvesting the moment the plant is done rather than two weeks after remove most of the problem. A listing which states a breeder tests parents for intersex traits is worth more for a sativa than for anything else.
Landrace
A population of plants shaped through generations to a particular region by local climate and growers alike, rather than by modern selection. Colombian, Thai, Malawian and Mexican stock are the classic sativa examples. A landrace is variable, not a single plant: inside a pack the heights, finishing times and aromas spread widely than any tent-bred hybrid, and this variation is the point of growing one.
The trap is buying a landrace as a finished product. It carries habits that made 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 provide. “Heirloom” on a listing generally means a landrace that has been grown out somewhere for some generations, typically with a degree of selection for indoor life; it is nearer to usable but nonetheless not uniform. A seller listing “landrace” without an collection point and a generation count is using the word loosely, and the pack should be priced accordingly.
Latitude (outdoor sativas)
The one figure that decides whether a sativa can ripen outdoors, and a number that no pack states. Equatorial lines require the autumn days to continue late enough to let the plant finish; at high latitudes the frost arrives before that, and the grower harvests an half-finished plant in the end of October or watches it rot in November. The further south, within a northern hemisphere, the later the season runs, and Mediterranean and low-latitude gardens can finish lines that temperate gardens never will.
The usable rule for a seed listing: an “outdoor” sativa harvest date is given for the breeder’s home latitude, usually a point in temperate Europe or the western United States, and every step north of it pushes the finish back 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 season.
Stretch
The burst of vertical growth that follows the switch to flowering. Indica-leaning plants add around half again; sativas commonly double, and some landrace types go further. The stretch lasts two to four weeks and cannot be halted after it begins, only redirected by training.
In tent terms, the stretch multiplier is a fact worth read ahead of deciding when to switch. A sativa flipped at sixty centimetres centimetres inside a two-metre tent is touching the lamp before week four of flower; one flipped at thirty centimetres has room. People moving over from indica strains almost always flip far too late the first time, and the consequence is visible on the ceiling of the tent.
