Sativa seeds arrive with more jargon attached than any other kind of cannabis seed, and most of it means a certain thing to a botanist, another to a seed company and something different again to the person standing in front of the listing. A disappointing sativa grow nearly always goes back to a word that was read in the wrong sense: a flowering time read as a fixed number, a «sativa-dominant» label read as a description of character, a landrace bought as if it were a modern hybrid. The entries below were put together with the range at https://hazesativaseeds.com open for the concrete examples, because it leans heavily towards the classic end of the spectrum and that is where the vocabulary matter most; the definitions themselves apply to any sativa seed from any seller. They are given in no particular order, because not one of them is sense without the rest.
Hermaphroditism in long-flowering lines
The appearance of male flowers on a female plant, usually late in flower and often under stress. Almost every cannabis line carries some tendency to it; sativa plants show it more, and the reason is one simple one: fourteen weeks of flower is sixteen weeks of opportunity for a timer leak, a heat spike or a missed watering to set it off, and an plant that has gone beyond its intended finish frequently produces a few late pollen flowers on its own in a final effort to make seed.
Not one of this means a sativa line weak by nature; it means the grower’s consistency count for longer. A sealed room, steady conditions and cutting when the plant is ready and not two weeks after take away the greater part of the problem. A listing that states the breeder screens parents for intersex tendency is worth worth hearing on a sativa than on any other category.
Terpinolene (the «sativa smell»)
A terpene present in high proportion in many classic sativa strains and responsible for most of what people mean as a «sativa» aroma: green, piney, citrus and slightly floral at once. It is volatile, lost easily by fast drying, and terpinolene degrades more quickly during the cure than the earthier terpenes which lead indica-leaning stock.
To a seed buyer the name earns two jobs. When a listing names terpinolene as the leading aromas, 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 by the jar, the drying is going to be slow and cool; a fast dry turns a terpinolene sativa to something that smells of hay and no trace of what the pack described.
Foxtailing
The tendency of certain flowers to grow fresh calyx clusters on top of old ones, producing towered, irregular buds rather than dense ones. In the majority of tent-bred strains it is a stress symptom, typically from light too close or temperatures that is too high, and the standard response is to correct the room.
In many sativas, above all Southeast Asian and certain Haze hybrids, it is built in and will occur under a perfect room. A first-time sativa grower frequently spends weeks hunting a fault that is not a problem, dropping lights and temperatures only delaying an already slow plant further. The breeder rarely warns which kind to expect; the parentage usually does.
Haze (the family, not the smell)
In its first sense a particular family of plants put together in 1970s California from Colombian, Colombian and South Indian landraces, and later kept and refined in the Netherlands. The Haze runs tall, fills out openly, flowers for twelve sixteen weeks and smells of incense, citrus and something sharp that no line quite reproduces.
In its second sense «Haze» is any cross that carries some of that family, which by now is most of the sativa-leaning catalogue. A listing that reads «Haze» without parents could be eighty percent the classic family or a sixteenth of it, and the grow time tracks the share, not the name. The working question is never «is it a Haze» but «how much, and through which parent».
Sativa-dominant (the label)
The catalogue category and not a measurable one. The phrase generally means that the larger share of a hybrid’s lineage were classed as sativa by the breeder who drafted the description, which sometimes means no more than a certain the buds are airier or the smell brighter than the same breeder’s other releases.
The experience people connect with the word, lively rather than sedating, is governed far more by terpene chemistry and by THC balance than it is by ancestry, and plenty of «sativa-dominant» releases deliver a flat sleepy result and plenty of indica-labelled stock deliver exactly the opposite. To a buyer the label is worth something as a loose hint to growth habit, flowering time and stretch; as a guide to how it feels it is next to worthless without the terpene description.
Landrace versus heirloom
A population of plants adapted over generations to a particular region by local climate and growers alike, and not by deliberate breeding. Colombian, Thai, Malawian and Mexican stock are the sativa cases. A landrace is variable, rather than a one plant: within a pack the flowering times, flowering times and aromas range far more than in any tent-bred hybrid, and that variation is the point of keeping one.
The mistake is buying a landrace like a modern hybrid. It brings habits that make sense in an equatorial field, such as height that no tent can contain and a flowering rhythm tuned to an daylength most growers cannot provide. «Heirloom» in a listing usually means a landrace that has been reproduced somewhere for some generations, typically with a degree of selection for tent life; it is nearer to usable but still not a hybrid. A shop offering «landrace» without a collection point and a reproduction count is using the word as a flavour, and the seeds should be judged with that in mind.
Flowering time
The figure of weeks from the start of flowering and harvest, and the one most frequently misread figure on a sativa pack. For photoperiod seed it is measured from the day the light drops to twelve hours, not from germination, so a «fourteen-week» sativa grown after a eight-week vegetative stage is a twenty-two-week plant. Breeders also quote the shorter end of a range, since the longer end sells fewer seed.
Sativa lines run anywhere from ten weeks to well over twenty, and the slowest strain in the Haze Sativa Seeds range comes in at about 16 weeks from the switch. The catalogue can be filtered by that figure, which is the reasonable first pass if you have a grower with a fixed timetable. A grower who adds four weeks to whatever the pack says is rarely disappointed.
Stretch
The burst of upward growth which follows the switch to flowering. Indica-leaning plants add half again; sativas routinely double, and some landrace lines go further. The stretch lasts three to five weeks and cannot be stopped after it has started, only bent sideways by training.
In tent terms, a stretch figure is the fact to reading before choosing when to switch. A sativa flipped at sixty centimetres inside a standard tent is touching the lamp by week four of flower; one flipped at thirty centimetres centimetres has room. Growers coming over from indica stock nearly always switch far too late the first time, and the lesson is written on the ceiling of the tent.
Equatorial (the twelve-hour problem)
Describes lines from latitudes in which daylength barely changes across the year, and where the plant never evolved a sharp reaction to changing days. Such plants frequently flower slowly at a standard twelve-hour light cycle, since twelve hours is, to them, a mild unremarkable day rather than a signal.
The practical fix, handed down between sativa growers for decades, is to shorten the light more: eleven hours, sometimes ten, especially in the final weeks. It costs some yield yield and gains a more clearer finish. A listing that uses «equatorial» is warning you about this with one word, and a grower that reads it as mere geography misses the point inside it.