Sativa seeds come with more vocabulary around them than any other kind of cannabis seed, and most of it means a certain thing to a botanist, something else to a breeder and something different again to the grower standing in front of the pack. 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 read as a statement of character, a landrace bought like it were a tent-bred hybrid. The entries below are put together with the range at https://hazesativaseeds.com to hand as the concrete examples, because it runs heavily towards the classic end of the spectrum and that is where the vocabulary matter most; the meanings themselves apply to any sativa seed from any shop. They are given in no particular order, since not one of them is sense on its own without the others.
Foxtailing (and when it is not a fault)
The tendency of some flowers to grow fresh bud growth on top of old ones, producing spired, irregular buds instead of round ones. In most indica-leaning lines it is a heat response, usually caused by light that is too close or temperatures too high, and the standard response is to correct the cause.
In many sativas, especially Southeast Asian and certain Haze hybrids, it is genetic and is going to happen in a perfect room. A first-time sativa grower often wastes weeks chasing a problem that was never a problem, dropping lights and heat and delaying an already slow plant even more. The breeder seldom says which type to expect; the lineage usually tells you.
Haze
In its first sense a particular line of plants bred in coastal California from Colombian, Colombian and Thai landraces, and later preserved and worked in the Netherlands. A true Haze runs tall, fills out sparsely, takes for twelve sixteen weeks and smells of incense, pine and a note sharp that no other line exactly has.
In its second sense "Haze" is any cross that contains some of that family, which today is a great many of the sativa-leaning market. A listing that reads "Haze" and gives no lineage could be mostly percent the classic family or a sixteenth of it, and the grow character follows the fraction, not the name. The useful question is not "is it a Haze" but "how much, and via which parent".
Equatorial (the twelve-hour problem)
Refers to plants out of regions where daylength barely changes through the year, which means that the plant never develop a sharp reaction to changing days. These plants frequently flower reluctantly at a conventional twelve-hour schedule, since twelve hours is, to them, an ordinary day and not a signal.
The working response, passed down among sativa growers over decades, is to cut the light more: eleven hours, sometimes ten, especially in the last weeks. It loses some little yield and buys an more clearer finish. A listing which says "equatorial" is warning you about this in one word, and a grower that reads it as mere geography misses the point inside it.
Landrace versus heirloom
A population of plants adapted over generations to a particular region by the local growers and climate together, rather than by deliberate breeding. Thai, Thai, Malawian and Oaxacan stock are the sativa examples. A landrace is variable, not a one plant: within a pack the flowering times, finishing times and aromas spread widely than any tent-bred line, and that variation is the point of keeping one.
The mistake is buying a landrace as a finished hybrid. It brings habits that make sense in an equatorial field, such as a frame no tent can contain and a flowering rhythm set to an daylength most growers never provide. "Heirloom" on a listing generally refers to a landrace that has been reproduced somewhere for a number of generations, typically with a degree of selection towards tent life; it is closer to manageable but still not uniform. A seller offering "landrace" that does not give an origin region and a generation count is applying the word as a flavour, and the pack should be priced with that in mind.
Stretch (the doubling)
The burst of vertical growth which comes after the switch to flowering. Indica-leaning plants add half their height again; sativas routinely double, and a few landrace lines triple. The stretch lasts three to four weeks and cannot be halted once it begins, only redirected by training.
In tent terms, a stretch multiplier is the number to read before choosing when to switch. A sativa switched at sixty centimetres centimetres in a standard tent is touching the lamp by week four of flower; one switched at thirty centimetres centimetres has room. People moving over from indica strains almost always flip too late the first time, and the lesson is written on the ceiling of the tent.
Intersex tendency
The production of male flowers on a female plant, usually late in flower and often in response to stress. Almost every cannabis line has a degree of tendency to it; long-flowering lines show it more often, and the reason is a plain reason: fourteen weeks of flower is fourteen weeks of exposure for a light leak, a heat spike or a missed watering that can trigger it off, and a old plant has gone past its intended end frequently produces a few late male flowers on its own as a final attempt to make seed.
Not one of these means a sativa strain unstable as a matter of course; it makes the room's discipline count for a longer stretch. A sealed room, steady conditions and cutting the moment the plant is done rather than two weeks later take away most of the problem. A listing that mentions the breeder tests parents for intersex traits is worth more for a sativa than on anything other category.
Flowering time (and what it is counted from)
The figure of weeks between the start of flowering and harvest, and the one most frequently misunderstood figure on a sativa pack. For photoperiod seed it is measured from the day the light drops to twelve hours, rather than from sowing, so a "fourteen-week" sativa grown with a ordinary vegetative stage is a five-month plant. Seed companies additionally give the optimistic end of a range, since the other end moves fewer seed.
Sativa lines take anywhere from ten weeks to more than twenty, and the longest line in the Haze Sativa Seeds range is at about 16 weeks after the flip. The catalogue can be filtered by this figure, which is a sensible first step if you have a grower with a fixed schedule. A grower who allows four weeks on top of whatever the pack says is rarely disappointed.
Terpinolene (the "sativa smell")
A aromatic compound found in high proportion in a lot of old sativa strains and accounting for most of the thing people describe as a "sativa" aroma: green, woody, lemon and slightly floral at once. It is volatile, lost easily through fast drying, and terpinolene degrades faster in the cure than the heavier terpenes which dominate indica-leaning stock.
To a seed buyer the name earns two things. Where a listing lists terpinolene among the leading terpene, the line most likely has substantial Haze-era ancestry regardless of what the percentage says. And where the grower wants that profile to still be there to the jar, the drying has to be cool and cool; a warm drying room turns a terpinolene sativa to something that tastes of hay and nothing of what the pack promised.
Latitude
The one number that determines whether a sativa can ripen outdoors, and a number that no pack states. Long-flowering plants need the autumn days to continue late enough for the plant ripen; at high latitudes the frost comes first, and the grower harvests an half-finished plant in late October or loses it rot in November. The further to the equator, in a northern hemisphere, the later the window runs, and Mediterranean or subtropical growers can ripen lines that northern growers never will.
The practical rule for a seed listing: an "outdoor" sativa finishing date is given for the breeder's own latitude, usually a point in temperate Europe or the western United States, and every step further north of it pushes the date back towards the frost. A grower north of about the fiftieth parallel that wants a long-flowering sativa outdoors is looking for a sativa autoflower or a covered space, and not a better season.
Sativa-dominant (the label)
The marketing term and not a measurable one. The phrase usually means that more of a hybrid's lineage are classed as sativa by whoever wrote the listing, which sometimes means no more than that the buds are airier or the smell brighter than the same breeder's other lines.
The experience people connect with the word, lively rather than heavy, is governed far more by terpene chemistry and the cannabinoid balance than it is by the sativa fraction, and plenty of "sativa-dominant" hybrids produce a heavy sleepy result and a good number of indica-labelled lines deliver the opposite. To a grower the percentage is useful as a rough hint to growth habit, flowering time and stretch; for a predictor to how it feels it is close to worthless unless accompanied by the terpene description.
