Sativa seeds arrive with more vocabulary around them than any other kind of cannabis seed, and a good deal of it means one 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 usually goes back to a word that was read in the wrong sense: a flowering time taken as a fixed number, a „sativa-dominant“ tag read as a description of character, a landrace bought as if it were a modern hybrid. The entries below are put together with the range at https://hazesativaseeds.com to hand for reference, because it leans heavily to the classic end of the spectrum and that is where the vocabulary carry the most weight most; the definitions though apply to any sativa seed from any shop. They are in no special order, since none of them makes usable without the rest.
Terpinolene (the „sativa smell“)
A aromatic compound present in high amounts in many classic sativa lines and accounting for much of what people mean as the „sativa“ smell: green, woody, lemon and faintly sweet all at once. It is volatile, lost quickly through fast drying, and terpinolene fades more quickly in the cure than the heavier terpenes that lead most tent lines.
To a seed buyer the name earns two jobs. Where a listing names terpinolene as the leading terpene, the strain most likely carries real old-sativa genetics whatever the percentage says. And when the grower are after that smell to still be there by the jar, the cure is going to be cool and slow; a warm dry flattens a terpinolene sativa to something that smells of hay and no trace of what the pack promised.
Landrace versus heirloom
A population of plants adapted through generations to one region by the local climate and growers together, and not by modern selection. Thai, Thai, Congolese and Oaxacan lines are the sativa examples. A landrace is variable, rather than a one plant: inside a pack the flowering times, finishing times and smells range far more than in any tent-bred line, and this spread is the point of keeping one.
The trap is treating a landrace as a finished hybrid. It brings traits that made sense in an equatorial field, such as a frame no tent can hold and a flowering rhythm tuned to a daylength the majority of growers never offer. „Heirloom“ on a listing usually refers to a landrace that has been grown out away from its origin for some generations, typically with light selection towards tent conditions; it is closer to manageable but nonetheless far from uniform. A seller offering „landrace“ without a collection region and a reproduction count is using the word as a flavour, and the seeds should be judged with that in mind.
Equatorial
Describes plants from latitudes in which daylength hardly varies across the year, which means where the plant never develop a sharp response to changing days. These lines frequently start flowering slowly under a conventional twelve-hour light cycle, since twelve hours is, for them, an unremarkable day rather than a signal.
The working response, passed around among sativa growers for decades, is to shorten the light more: eleven hours, occasionally ten, particularly in the final weeks. It costs some little yield and buys an earlier decisive finish. A listing that says „equatorial“ is telling you about this in one word, and a grower who reads it as mere geography has missed the instruction inside it.
Haze (the family, not the smell)
In its first sense a particular family of plants put together in coastal California from Colombian, Colombian and Thai parents, and later kept and refined in the Netherlands. The Haze grows tall, branches openly, takes for twelve to sixteen weeks and smells of incense, citrus and something sharp that no other other line exactly reproduces.
In its second sense „Haze“ is any hybrid that contains some of that family, which by now is most of the sativa-leaning market. A listing which reads „Haze“ without lineage could be eighty percent the old family or a sixteenth of it, and the grow time tracks the share, not the name. The working question is not „is it a Haze“ but „how much, and through which parent“.
Hermaphroditism in long-flowering lines
The appearance of male flowers on a female plant, usually late in flower and frequently in response to stress. Every cannabis line carries some capacity for do; sativa lines show it more, and the reason is a plain reason: fourteen weeks of flower is sixteen weeks of exposure for a light leak, a temperature spike or a missed watering to trigger it off, and a plant plant has already waited beyond its natural finish frequently produces a few late pollen flowers on its own in a last effort to set seed.
None of these means a sativa strain unstable as a matter of course; it means the grower’s discipline matter for a longer stretch. Light-tight room, stable temperatures and cutting the moment the plant is ready rather than two weeks later take away most of the problem. A listing which states the breeder screens parents for hermaphrodite traits is worth worth hearing for a sativa than on anything else.
Latitude (outdoor sativas)
The one figure that determines if a sativa can finish outdoors, and one no pack states. Equatorial lines need the run of shortening days to continue late enough for the plant finish; in high latitudes the frost arrives before that, and the grower harvests a half-finished plant in the end of October or watches it to mould in November. A further to the equator, in the northern hemisphere, the longer the season runs, and Mediterranean and subtropical gardens can finish lines that temperate gardens cannot.
The usable rule for a seed pack: an „outdoor“ line harvest date is stated for the breeder’s home latitude, normally a point within southern Europe or the western United States, and each degree further north of it moves the finish back towards the weather. A grower above about the fiftieth parallel that wants a true sativa outdoors is shopping for an autoflower or else a greenhouse, and not a better season.
Stretch
The burst of upward growth that comes after the change to flowering. Most tent-bred plants add around half their height again; sativas routinely double, and a few landrace types triple. The stretch lasts three to four weeks and will not be stopped once it begins, merely bent sideways by training.
In tent terms, the stretch multiplier is the fact worth reading ahead of deciding when to switch. A sativa flipped at sixty centimetres centimetres in a standard tent is at the lamp before week four of flower; one switched at thirty centimetres centimetres has room. People moving over from indica strains nearly always flip too late the first time, and the consequence is written on the ceiling of the tent.
Sativa-dominant (the label)
The catalogue term and not a measurable one. The phrase usually means that more of a hybrid’s lineage are classed as sativa according to whoever wrote the listing, and occasionally means nothing more than a certain the flowers are airier or the smell sharper than the that breeder’s indica-labelled lines.
The experience people connect with the word, clear-headed instead of heavy, is governed more by terpene profile and the THC balance than by ancestry, and plenty of „sativa-dominant“ hybrids produce a flat sleepy effect and plenty of the opposite stock deliver exactly the opposite. For a buyer the percentage is worth something as a loose guide to growth habit, flowering time and stretch; for a predictor to effect it is close to worthless unless accompanied by the terpene description.
Flowering time (and what it is counted from)
The number of weeks from the start of flowering and maturity, and the single most frequently misread number on a sativa pack. With photoperiod seed it is measured from the day the light drops to twelve hours, rather than from sowing, so a „fourteen-week“ sativa started after a ordinary vegetative period is a five-month plant. Breeders additionally quote the optimistic end of a range, since the other end moves fewer seed.
Sativa lines run anywhere from ten weeks to well over twenty, and the slowest strain in the Haze Sativa Seeds range is at around 16 weeks after the flip. The catalogue can be sorted by this figure, which is the sensible first step for a room on a tight schedule. A grower who allows four weeks on top of whatever the pack states is rarely disappointed.
Foxtailing
The habit of certain flowers to push out fresh calyx clusters on top of existing ones, producing spired, irregular buds instead of round ones. In most indica-leaning strains it is a stress symptom, usually from light that is too close or temperatures that is too high, and the standard response is to correct the cause.
In many sativas, above all Thai and some Haze hybrids, it is built in and is going to occur under a perfect room. A first-time sativa grower frequently spends weeks hunting a fault that is not there, dropping lights and heat and delaying an already slow flower further. The listing rarely says which kind you should expect; the parentage generally does.