Sativa seeds come with more vocabulary around them than any other category of cannabis seed, and most of it means a certain thing to a botanist, another to a seed company and a third to the grower standing in front of the listing. A failed sativa grow nearly always traces back to a word that was understood in the wrong one of those senses: a flowering time read as a fixed number, a “sativa-dominant” label taken as a description of character, a landrace chosen as if it were a tent-bred hybrid. The entries below are put together with the range at https://hazesativaseeds.com to hand as reference, because it leans heavily to the long-flowering end of the spectrum and that is where the vocabulary matter most; the meanings themselves apply to any sativa seed from any seller. They are in no particular order, since none of them is usable without the rest.
Flowering time (and what it is counted from)
The figure of weeks between the onset of flowering and harvest, and the single most frequently misunderstood number on a sativa pack. With photoperiod seed it is measured from the day the light drops to twelve hours, rather than from germination, so a “fourteen-week” sativa started with a eight-week vegetative period is a twenty-two-week plant. Seed companies additionally give the optimistic end of the range, because the longer end sells fewer seed.
Long-flowering plants run anywhere from ten weeks to more than twenty, and the slowest strain in the Haze Sativa Seeds range is at about 16 weeks after the switch. The catalogue can be sorted by that number, which is a sensible first pass if you have a room on a fixed timetable. A grower who adds four weeks on top of whatever the pack states is seldom disappointed.
Equatorial (the twelve-hour problem)
Refers to lines out of latitudes in which daylength barely varies through the year, and where the plant does not develop a sharp reaction to shortening days. Such plants frequently flower reluctantly under a standard twelve-hour schedule, because twelve hours is, for them, a mild ordinary day rather than a signal.
The working response, passed around between sativa growers for decades, is to shorten the light more: eleven hours, occasionally ten, especially in the last weeks. It costs a yield yield and buys an earlier decisive end. A listing that uses “equatorial” is telling you this in one word, and a grower that reads it as a note on geography has missed the instruction hidden in it.
Stretch (the doubling)
The burst of vertical growth which comes after the switch to flowering. Indica-leaning plants add half their height again; sativas commonly double, and some equatorial lines triple. The stretch lasts three to five weeks and cannot be halted once it has started, only redirected by training.
In tent terms, the stretch multiplier is the number worth reading before choosing when to switch. A sativa switched at sixty centimetres centimetres in a two-metre tent is touching the lamp before week four of flower; one switched at thirty centimetres has room. Growers coming over from indica strains almost always switch far too late the first time, and the consequence is written on the ceiling of the tent.
Terpinolene (the “sativa smell”)
A aromatic compound found in high proportion in a lot of classic sativa lines and accounting for much of what growers mean as a “sativa” aroma: green, woody, citrus and faintly floral at once. It is volatile, driven off quickly by hot drying, and terpinolene degrades more quickly in the cure than the earthier terpenes that lead indica-leaning lines.
For a seed buyer the name does two jobs. When a listing names terpinolene among the lead terpene, the line probably has substantial old-sativa genetics regardless of what the percentage claims. And where the grower are after that profile to still be there to the jar, the cure is going to be cool and cool; a fast drying room flattens a terpinolene line to something that tastes of hay and no trace of what the pack described.
Haze (the family, not the smell)
In its first sense a particular line of plants put together in 1970s California from Colombian, Colombian and Thai landraces, and later preserved and refined in the Netherlands. A true Haze grows tall, fills out sparsely, takes for twelve to sixteen weeks and carries a scent of spice, citrus and something metallic that no other line quite reproduces.
In its looser sense “Haze” is any cross that carries some of that family, which today is a great many of the sativa-leaning catalogue. A listing which reads “Haze” without lineage may be mostly percent the classic family or one small fraction of it, and the flowering character follows the fraction, not the name. The working question is never “is it a Haze” but “how much, and via which parent”.
Sativa-dominant (the label)
A marketing term rather than a botanical one. It usually indicates that the larger share of a hybrid’s parents were classed as sativa according to the breeder who wrote the listing, which sometimes signals nothing more than a certain the flowers are airier or the aroma brighter than the that breeder’s other lines.
The experience people connect with the word, lively instead of sedating, is governed far more by terpene chemistry and the THC balance than by ancestry, and a good number of “sativa-dominant” hybrids deliver a flat sleepy result while plenty of indica-labelled lines deliver the opposite. To a buyer the percentage is worth something as a loose hint to growth habit, flowering time and stretch; for a predictor to effect it is next to useless without the terpene description.
Intersex tendency
The appearance of male flowers on a female plant, typically towards the end in flower and often in response to stress. Almost every cannabis population carries some tendency to do; long-flowering lines show it more, and the reason is a simple reason: sixteen weeks of flower is fourteen weeks of opportunity for a timer leak, a heat spike or a missed watering to trigger it going, and a plant plant has gone past its natural finish often produces a few late pollen flowers on its own in a last attempt to make seed.
None of these makes a sativa line weak by nature; it makes the room’s discipline count for a longer stretch. A sealed room, steady temperatures and harvesting when the plant is ready and not two week after take away the greater part of the problem. A listing which mentions a breeder screens parents for intersex traits is worth more for a long-flowering line than for anything else.
Foxtailing
The habit of certain flowers to grow fresh calyx clusters on top of existing ones, giving spired, irregular buds instead of dense ones. In the majority of indica-leaning lines it is a heat symptom, usually caused by light too close or a room too high, and the standard response is to fix the room.
In a good number of sativas, above all Southeast Asian and certain Haze hybrids, it is built in and will happen in a flawless room. A first-time sativa grower often spends a month chasing a fault that was never not a problem, dropping lights and temperatures only slowing a slow plant further. The listing seldom says which type you should expect; the parentage generally tells you.
Landrace versus heirloom
A population of plants shaped over generations to one place by local growers and climate together, rather than by modern breeding. Colombian, Thai, Congolese and Oaxacan lines are the sativa cases. A landrace is variable, not a single plant: inside a pack the heights, finishing times and aromas range widely than in a tent-bred hybrid, and this variation is the whole value of keeping one.
The trap is buying a landrace like a modern hybrid. It carries traits that make sense in an open field, including height that no tent can hold and a flowering rhythm tuned to an equatorial daylength the majority of growers cannot provide. “Heirloom” on a listing usually means a landrace that has been reproduced away from its origin over some generations, typically with light selection for tent conditions; it is nearer to usable but still not a hybrid. A seller listing “landrace” that does not give an origin region and a generation count is using the word loosely, and the pack should be priced accordingly.