Sativa seeds arrive with more jargon attached than any other category 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 trying to make a decision in front of the listing. The disappointing sativa grow usually goes back to a word that was read in the wrong one of those senses: a flowering time read as a promise, a “sativa-dominant” tag taken as a statement of effect, a landrace chosen as if it were a tent-bred hybrid. The entries below are written with the range at https://hazesativaseeds.com to hand as reference, because it leans strongly to the classic end of the spectrum where the vocabulary matter most; the definitions themselves hold to any sativa seed from any seller. They are in no special order, since none of them is sense on its own without the rest.
Hermaphroditism in long-flowering lines
The production of pollen-bearing flowers on a female plant, usually late in flower and often in response to stress. Every cannabis line has some capacity for do; long-flowering plants show it more, and the reason is one plain reason: fourteen weeks of flower is sixteen weeks of exposure for a light leak, a heat spike or a late watering that can set it going, and an plant that has waited beyond its natural end often produces a few late male sacs on its own in a last effort to make seed.
None of this makes a sativa strain unstable as a matter of nature; it makes the grower’s consistency matter for a longer stretch. Light-tight tents, stable conditions and cutting when the plant is ready and not a weeks later take away most of the risk. A listing that states a breeder tests parents for intersex traits is saying something more on a long-flowering line than for anything other category.
Flowering time (and what it is counted from)
The number of weeks from the onset of flowering and maturity, 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 grown with an eight-week vegetative period is a five-month plant. Breeders additionally quote the shorter end of a range, because the other end sells less seed.
Long-flowering lines run anywhere from ten weeks to well over twenty, and the slowest strain in the Haze Sativa Seeds range comes in at around 16 weeks after the flip. The catalogue can be filtered by this figure, which is a sensible first step if you have a room with a tight schedule. A grower who allows four weeks to the figure the pack says is rarely disappointed.
Terpinolene
A aromatic compound present in high proportion in many classic sativa lines and accounting for much of the thing growers mean as the “sativa” aroma: green, piney, citrus and faintly sweet at once. It is fragile, lost easily through hot drying, and it fades faster during storage than the heavier terpenes which dominate most tent stock.
For a seed buyer the name earns two things. When a listing names terpinolene among the lead terpene, the strain probably carries substantial Haze-era ancestry regardless of what the label claims. And where the grower are after that profile to still be there to the jar, the drying is going to be slow and slow; a fast dry turns a terpinolene sativa to a flower that smells of hay and no trace of what the pack promised.
Foxtailing
The habit of some flowers to grow fresh calyx growth on top of old ones, giving towered, open buds rather than dense ones. In most indica-leaning lines it is a heat response, usually caused by light that is too close or temperatures that is too high, and the standard response is to correct the cause.
In a good number of sativas, above all Thai and some Haze hybrids, it is built in and is going to occur under a perfect room. A first-time sativa grower frequently wastes weeks chasing a fault that is there, lowering lights and temperatures only slowing a long plant further. The breeder seldom says which kind to expect; the parentage usually tells you.
Stretch
The burst of upward growth which follows the change to flowering. Most tent-bred plants add around half again; sativas routinely double, and a few equatorial types go further. The stretch lasts two to five weeks and cannot be halted once it begins, only redirected by training.
In tent terms, a stretch figure is a number to read ahead of deciding when to switch. A sativa flipped at sixty centimetres in a two-metre tent is touching the lamp before week four of flower; one flipped at thirty centimetres has room. Growers coming over from indica strains almost always flip too late the first time, and the consequence is written on the ceiling of the tent.
Landrace
A population of plants shaped through generations to a particular place by the local climate and growers together, rather than by deliberate breeding. Thai, Thai, Malawian and Oaxacan stock are the sativa cases. A landrace is a spread, not a single plant: within a pack the heights, finishing times and aromas spread widely than in a tent-bred hybrid, and this spread is the whole value of keeping one.
The trap is buying a landrace as a finished hybrid. It carries traits that made sense in an open field, such as a frame that no tent can contain and a flowering rhythm set to an equatorial daylength most growers cannot provide. “Heirloom” on a listing usually means a landrace that has been reproduced somewhere for a number of generations, typically with a degree of selection towards indoor conditions; it is nearer to usable but nonetheless not uniform. A shop listing “landrace” without an collection point and a reproduction count is using the word loosely, and the pack should be priced accordingly.
Haze
Originally a particular line of plants bred in 1970s California from Colombian, Thai and Thai parents, and later preserved and refined in the Netherlands. A true Haze runs tall, branches sparsely, flowers for twelve sixteen weeks and smells of spice, citrus and a note metallic that no other line exactly reproduces.
In its second sense “Haze” is any cross that contains some of that family, which by now is most of the sativa-leaning catalogue. A listing which reads “Haze” and gives no lineage may be mostly percent original classic family or one sixteenth of it, and the grow character tracks the share, not the name. The working question is not “is it a Haze” but “how much, and through which parent”.
Latitude
The single number that decides if a sativa will ripen outdoors, and a number no pack states. Equatorial plants need the autumn days to continue long enough for the plant finish; at northern latitudes the frost comes first, and the grower harvests a unripe plant in the end of October or else loses it rot in November. The further south, in the northern hemisphere, the later the window runs, and coastal or subtropical gardens are able to finish plants that temperate gardens never will.
The usable rule for a seed pack: an “outdoor” line finishing date is given for the breeder’s home latitude, normally a point within southern Europe or the western United States, and every degree north of it pushes the date back into the frost. A grower north of about the fiftieth parallel who wants a long-flowering sativa outdoors is shopping for a sativa autoflower or a covered space, not a longer season.
Equatorial
Describes plants out of regions where daylength barely changes across the year, which means where the plant never evolved a strong response to shortening days. These plants frequently flower reluctantly at a conventional twelve-hour schedule, since twelve hours is, to them, an unremarkable day and not a signal.
The practical response, handed around among sativa growers over decades, is to shorten the light further: eleven hours, occasionally ten, especially in the last weeks. It costs a yield yield and gains an more decisive finish. A listing that uses “equatorial” is telling you this with one word, and a grower that reads it as a note on origin misses the point hidden in it.