Sativa seeds come with more jargon around them than any other kind of cannabis seed, and a good deal of it means a certain thing to a botanist, something else to a seed company and a third to the person standing in front of the listing. The disappointing sativa grow nearly always goes back to a word that was understood in the wrong one of those senses: a flowering time taken as a promise, a “sativa-dominant” label read as a statement of effect, a landrace bought like it were a modern hybrid. The entries below are put together with the range at https://hazesativaseeds.com open for the concrete examples, because it leans strongly to the classic end of the spectrum and that is where the vocabulary carry the most weight most; the definitions though hold to any sativa seed from any shop. They are in no special order, because not one of them is sense on its own without the rest.
Hermaphroditism in long-flowering lines
The appearance of pollen-bearing flowers on a female plant, usually late in flower and frequently under stress. Every cannabis line has a degree of tendency to it; sativa lines show it more often, and the reason is a plain one: fourteen weeks of flower is sixteen weeks of opportunity for a timer leak, a heat spike or a late watering that can set it going, and a old plant has already gone past its intended end often produces a few late pollen sacs on its own in a last effort to make seed.
None of this means a sativa strain unstable by nature; it makes the room’s discipline matter over longer. Light-tight room, steady temperatures and cutting when the plant is ready and not two weeks after remove most of the risk. A listing that mentions a breeder tests parents for hermaphrodite tendency is saying something worth hearing on a sativa than on any other category.
Sativa-dominant
A marketing term and not a botanical one. It generally means that more of a hybrid’s parents were described as sativa according to whoever drafted the description, which sometimes means no more than that the buds are longer or the aroma sharper than the that breeder’s indica-labelled lines.
The effect people associate with the word, clear-headed rather than sedating, is governed more by terpene profile and by cannabinoid balance than it is by the sativa fraction, and plenty of “sativa-dominant” hybrids deliver a flat sleepy effect while plenty of indica-labelled lines do exactly the opposite. For a grower the percentage is worth something as a loose guide to growth habit, flowering time and stretch; for a guide to effect it is next to useless without the terpene description.
Foxtailing (and when it is not a fault)
The tendency of certain flowers to push out new bud growth on top of existing ones, producing spired, irregular buds instead of dense ones. In most tent-bred strains it is a heat symptom, usually caused by light that is too close or a room that is too high, and the standard response is to fix the room.
In many sativas, above all Thai and some Haze lines, it is built in and will happen in a flawless room. A new sativa grower frequently wastes a month chasing a problem that is there, dropping lights and temperatures only delaying an already long plant even more. The breeder seldom says which type to expect; the parentage generally does.
Stretch
The surge of vertical growth that follows the change to flowering. Indica-leaning plants gain around half their height again; sativas commonly double, and a few landrace lines triple. The stretch continues two to five weeks and cannot be halted once it has started, merely bent sideways by training.
In practical terms, the stretch multiplier is a fact worth read before choosing when to flip. A sativa switched at sixty centimetres centimetres inside a two-metre tent is touching the lamp by week four of flower; one switched at thirty centimetres centimetres has room. Growers moving over from indica strains almost always switch too late the first time, and the lesson is visible on the ceiling of the tent.
Latitude (outdoor sativas)
The single figure that decides whether a sativa will finish outdoors, and a number no pack prints. Equatorial lines need the run of shortening days to go on late enough to let the plant finish; at northern latitudes the frost arrives before that, 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 coastal and low-latitude gardens can ripen plants that temperate gardens never will.
The practical rule of a seed pack: an “outdoor” line harvest date is stated for the breeder’s home latitude, usually somewhere in temperate Europe or the western United States, and every step north of it pushes the finish later towards the frost. A grower north of about the fiftieth parallel that wants a true sativa outdoors is shopping for a sativa autoflower or a greenhouse, and not a longer summer.
Haze
Originally a particular family of plants put together in 1970s California from Mexican, Thai and South Indian parents, and then preserved and refined in the Netherlands. A true Haze runs tall, fills out openly, takes for twelve to sixteen weeks and smells of spice, pine and a note metallic that no line quite has.
In its looser sense “Haze” is whatever cross that carries some of that family, and by now is a great many of the sativa-leaning market. A listing that reads “Haze” and gives no lineage may be mostly percent the old family or one sixteenth of it, and the flowering character follows the fraction, not the name. The useful question is never “is it a Haze” but “how much, and through which parent”.
Landrace
A population of plants shaped through generations to a particular region by local growers and growers together, rather than by modern breeding. Thai, Thai, Congolese and Oaxacan lines are the sativa examples. A landrace is variable, rather than a one plant: inside a pack the heights, flowering times and smells range widely than in a tent-bred hybrid, and that variation is the point of growing one.
The mistake is treating a landrace as a modern product. It carries habits that made sense in an equatorial field, including a frame no tent can hold and a flowering rhythm tuned to an daylength the majority of growers never offer. “Heirloom” in a listing generally means a landrace that has been grown out somewhere for some generations, typically with a degree of selection towards indoor life; it is nearer to manageable but nonetheless far from a hybrid. A shop listing “landrace” without a origin region and a generation count is using the word loosely, and the pack should be priced accordingly.
Equatorial (the twelve-hour problem)
Refers to lines out of regions in which daylength hardly varies across the year, which means that the plant never evolved a strong response to shortening days. Such plants often start flowering slowly at a standard twelve-hour light cycle, because twelve hours is, to them, a mild unremarkable day and not a signal.
The working response, handed down among sativa growers for decades, is to cut the light more: eleven hours, occasionally ten, particularly in the last weeks. It costs a little yield and buys a earlier decisive end. A listing that says “equatorial” is telling you this in one word, and a grower that reads it as a note on geography misses the point inside it.
Terpinolene
A aromatic compound found in large amounts in a lot of old sativa strains and accounting for most of what growers describe as a “sativa” smell: green, woody, citrus and faintly floral all at once. It is fragile, driven off easily by fast drying, and terpinolene fades faster in storage than the earthier terpenes which dominate most tent stock.
To a seed buyer the name earns two things. When a listing names terpinolene among the lead aromas, the line most likely carries real old-sativa ancestry whatever the percentage says. And when the you are after that profile to still be there to the jar, the cure is going to be slow and slow; a fast drying room flattens a terpinolene sativa into a flower that tastes of very little and leaves no trace of what the pack described.