Sativa seeds come with more jargon attached than any other category of cannabis seed, and most of it means a certain thing to a botanist, another to a breeder and something different again to the person standing in front of the listing. The disappointing sativa grow usually goes back to a word that was read in the wrong sense: a flowering time taken as a promise, a “sativa-dominant” label taken as a statement of character, a landrace bought as if it were a modern hybrid. The entries below were written with the range at https://hazesativaseeds.com open as reference, because it runs heavily towards the long-flowering end of the spectrum where the vocabulary matter most; the meanings though hold to any sativa seed from any shop. They are given in no special order, since not one of them makes sense without the rest.
Sativa-dominant
A catalogue category and not a botanical one. It generally indicates that the larger share of a hybrid’s parents are classed as sativa by the breeder who wrote the description, which occasionally means nothing more than that the flowers are longer or the smell brighter than the same breeder’s other lines.
The experience people associate with a word, lively rather than sedating, is governed more by terpene profile and the THC balance than it is by the sativa fraction, and plenty of “sativa-dominant” hybrids produce a heavy sleepy result while a good number of the opposite lines deliver the opposite. To a buyer the percentage is worth something for a rough hint to growth habit, flowering time and stretch; for a predictor to effect it is next to useless unless accompanied by the aroma description.
Intersex tendency
The appearance of male flowers on a female plant, usually late in flower and frequently under stress. Every cannabis line has some capacity to do; long-flowering lines express it more, and the reason is one plain reason: sixteen weeks of flower is fourteen weeks of exposure for a timer leak, a heat spike or a late watering that can trigger it off, and an plant that has gone past its natural end frequently produces a few desperate male sacs on its own as a final effort to make seed.
Not one of these makes a sativa strain unstable by course; it makes the grower’s discipline matter for a longer stretch. A sealed tents, steady temperatures and cutting when the plant is ready and not a weeks later remove the greater part of the problem. A listing that mentions a breeder tests parents for intersex traits is worth worth hearing on a long-flowering line than for any else.
Foxtailing
The habit of certain flowers to push out new bud growth on top of existing ones, producing towered, irregular buds instead of round ones. In the majority of indica-leaning lines it is a stress response, usually from light too close or a room that is too high, and the advice is to fix the cause.
In many sativas, above all Thai and some Haze hybrids, it is genetic and is going to happen in a flawless room. A first-time sativa grower frequently spends a month hunting a fault that was never a problem, dropping lights and heat and delaying a slow flower even more. The breeder seldom warns which kind you should expect; the lineage usually does.
Equatorial
Describes plants from latitudes in which daylength hardly varies across the year, which means where the plant never evolved a strong response to changing days. Such plants frequently flower reluctantly under a conventional twelve-hour schedule, since twelve hours is, to them, an ordinary day rather than a signal.
The practical fix, passed down between sativa growers for decades, is to shorten the light more: eleven hours, occasionally ten, especially in the final weeks. It costs a little yield and buys an earlier decisive finish. A listing that uses “equatorial” is warning you about this with one word, and a grower who reads it as mere geography misses the point hidden in it.
Flowering time
The number of weeks from the onset of flowering and harvest, and the one 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 after an ordinary vegetative stage is a twenty-two-week plant. Seed companies additionally give the optimistic end of the range, because the longer end sells less seed.
Sativa plants take anywhere from ten weeks to well over twenty, and the slowest line in the Haze Sativa Seeds range comes in at about 16 weeks after the flip. The catalogue can be sorted by this number, which is a reasonable first pass if you have a room with a tight timetable. A grower who allows four weeks to the figure the pack says is rarely caught out.
Stretch (the doubling)
The surge of vertical growth that follows the switch to flowering. Indica-leaning plants gain around half again; sativas commonly double, and some landrace types go further. The stretch continues two to four weeks and cannot be stopped after it has started, only bent sideways by training.
In tent terms, a stretch multiplier is a fact worth reading ahead of deciding when to switch. A sativa flipped at sixty centimetres in a two-metre tent is at the lamp by week four of flower; one flipped at thirty centimetres has room. People coming from indica strains almost always switch far too late the first time, and the consequence is visible on the ceiling of the tent.
Haze
Originally a particular line of plants bred in 1970s California from Mexican, Colombian and Thai landraces, and later preserved and refined in the Netherlands. The Haze runs tall, fills out openly, takes for twelve to sixteen weeks and carries a scent of spice, citrus and a note metallic 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 that reads “Haze” and gives no parents could be mostly percent the classic family or a small fraction 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”.
Landrace versus heirloom
A population of plants adapted over centuries to a particular place by local growers and climate together, and not by modern selection. Thai, Thai, Congolese and Mexican stock are the classic sativa cases. A landrace is variable, rather than a one plant: within a pack the heights, finishing times and aromas range widely than any tent-bred hybrid, and this spread is the point of keeping one.
The trap is buying a landrace like a modern product. It carries traits that made sense in an open field, including height no tent can hold and a flowering clock set to a equatorial daylength the majority of growers never offer. “Heirloom” on a listing generally means a landrace that has been reproduced somewhere for some generations, often with a degree of selection for tent conditions; it is nearer to usable but still far from a hybrid. A shop offering “landrace” without a collection point and a reproduction history is using the word as a flavour, and the seeds should be judged accordingly.
Latitude
The one number that determines if a sativa will finish outdoors, and a number that no pack prints. Equatorial plants require a autumn days to continue long enough to let the plant ripen; at northern latitudes the frost arrives first, and the grower harvests a half-finished plant in the end of October or loses it to mould in November. A further to the equator, in a northern hemisphere, the longer the window stretches, and coastal or low-latitude gardens are able to ripen lines that temperate growers cannot.
The practical reading for a seed pack: an “outdoor” line finishing month is stated for the breeder’s own latitude, normally a point in southern Europe or the western United States, and every step north of that moves the date back towards the weather. A grower north of roughly the fiftieth parallel who wants a true sativa outdoors is looking for a sativa autoflower or a covered space, and not a better summer.
Terpinolene (the “sativa smell”)
A aromatic compound found in high amounts in a lot of classic sativa strains and accounting for much of the thing people mean as the “sativa” smell: fresh, piney, citrus and faintly sweet at once. It is fragile, driven off easily by hot drying, and it fades more quickly during the cure than the earthier terpenes which dominate indica-leaning stock.
For a seed buyer the name earns two things. When a listing names terpinolene among the leading terpene, the strain most likely has substantial Haze-era ancestry whatever the label claims. And when the you are after that smell to still be there to the jar, the drying is going to be cool and slow; a warm drying room turns a terpinolene line to something that tastes of very little and leaves no trace of what the pack promised.