Sativa seeds come with more vocabulary around them than any other category of cannabis seed, and a good deal of it means one thing to a botanist, another to a breeder and a third to the person trying to make a decision in front of the listing. The disappointing sativa grow nearly always goes back to a word that was understood in the wrong one of those senses: a flowering time taken as a promise, a “sativa-dominant” tag taken as a description of effect, a landrace bought as if it were a tent-bred hybrid. The entries below are put together with the range at https://hazesativaseeds.com open as reference, because it leans strongly to the long-flowering end of the spectrum and that is where the vocabulary carry the most weight most; the meanings though apply to any sativa seed from any shop. They are in no particular order, since none of them is sense without the rest.
Terpinolene (the “sativa smell”)
A aromatic compound found in large amounts in a lot of classic sativa strains and accounting for most of what people mean as a “sativa” smell: fresh, woody, citrus and faintly sweet at once. It is volatile, lost quickly through hot drying, and terpinolene degrades more quickly in the cure than the earthier terpenes which lead most tent lines.
To a seed buyer the name does two things. When a listing names terpinolene as the lead aromas, the strain probably has substantial old-sativa ancestry whatever the label claims. And when the you are after that profile to still be there to the jar, the drying is going to be slow and cool; a fast drying room flattens a terpinolene line into a flower that tastes of very little and nothing of what the pack promised.
Foxtailing
The tendency of certain flowers to grow fresh calyx clusters on top of old ones, giving towered, irregular buds rather than round ones. In the majority of tent-bred strains it is a stress symptom, usually from light that is too close or a room too high, and the standard response is to fix the cause.
In a good number of sativas, especially Southeast Asian and some Haze lines, it is built in and will happen under a flawless room. A new sativa grower often wastes a month hunting a fault that was never not a problem, dropping lights and temperatures only delaying an already slow plant further. The listing rarely warns which type to expect; the lineage generally does.
Flowering time
The number of weeks from the onset of flowering and harvest, and the single most frequently misread figure on a sativa pack. With photoperiod seed it is counted from the day the light drops to twelve hours, rather than from germination, so a “fourteen-week” sativa started with an eight-week vegetative stage is a five-month plant. Seed companies additionally give the optimistic end of the spread, since the other end sells less seed.
Long-flowering lines take anywhere from ten weeks to well over twenty, and the slowest line in the Haze Sativa Seeds range is at about 16 weeks from the switch. The catalogue can be sorted by this figure, which is a sensible first step for a room with a tight timetable. A grower who allows four weeks to whatever the pack says is seldom caught out.
Equatorial (the twelve-hour problem)
Refers to plants from regions where daylength hardly varies across the year, which means where the plant never evolved a sharp reaction to changing days. These plants frequently start flowering reluctantly at a conventional twelve-hour light cycle, because twelve hours is, to them, a mild ordinary day rather than a signal.
The working fix, handed down among sativa growers for decades, is to cut the light more: eleven hours, sometimes ten, especially in the final weeks. It loses some little yield and buys an earlier clearer finish. A listing that says “equatorial” is warning you this in one word, and a grower who reads it as mere origin misses the point hidden in it.
Stretch (the doubling)
The burst of upward growth which comes after the change to flowering. Indica-leaning plants gain around half their height again; sativas routinely double, and a few equatorial lines go further. The stretch continues two to five weeks and will not be stopped once it begins, only bent sideways by training.
In practical terms, the stretch figure is a number worth read ahead of deciding when to flip. A sativa flipped at sixty centimetres centimetres in a two-metre tent is touching the lamp by week four of flower; one flipped at thirty centimetres has room. People moving from indica strains nearly always flip too late the first time, and the lesson is visible on the ceiling of the tent.
Landrace
A population of plants adapted over centuries to one region by the local climate and climate alike, and not by modern breeding. Thai, Thai, Congolese and Oaxacan stock are the classic sativa cases. A landrace is variable, not a one plant: inside a pack the heights, finishing times and aromas spread widely than any tent-bred line, and that spread is the whole value of keeping one.
The mistake is treating a landrace like a finished product. It carries traits that made sense in an open field, including a frame no tent can contain and a flowering rhythm tuned to an daylength most growers never offer. “Heirloom” in a listing generally refers to a landrace that has been reproduced somewhere over some generations, typically with light selection towards indoor conditions; it is nearer to manageable but still far from a hybrid. A seller listing “landrace” without an collection region and a reproduction count is using the word loosely, and the pack should be priced with that in mind.
Sativa-dominant
A marketing term rather than a botanical one. It generally indicates that more of a hybrid’s parents were classed as sativa by the breeder who drafted the listing, and sometimes means nothing more than that the buds are airier or the aroma sharper than the same breeder’s indica-labelled lines.
The experience people associate with a word, clear-headed instead of heavy, is driven more by terpene profile and by THC balance than by ancestry, and a good number of “sativa-dominant” releases produce a flat couch result and plenty of indica-labelled stock deliver exactly the opposite. For a buyer the label is worth something as a loose hint to growth habit, flowering time and stretch; as a guide to effect it is next to useless without the terpene notes.
Latitude
The one figure that determines whether a sativa will finish outdoors, and a number that no pack prints. Equatorial plants require a run of shortening days to go on long enough for the plant to ripen; in high latitudes the frost arrives before that, and the grower harvests a unripe plant in the end of October or else watches it to mould in November. The closer south, within a northern hemisphere, the longer the window runs, and coastal or low-latitude gardens are able to ripen plants that temperate gardens cannot.
The practical reading of a seed pack: an “outdoor” line harvest date is given for the breeder’s own latitude, usually somewhere in southern Europe or the western United States, and each step north of that moves the finish later towards the weather. A grower north of roughly the fiftieth parallel that wants a true sativa outdoors needs to be shopping for a sativa autoflower or else a covered space, not a better summer.
Haze (the family, not the smell)
Originally a particular family of plants put together in 1970s California from Colombian, Thai and South Indian parents, and later preserved and refined in the Netherlands. A true Haze grows tall, fills out sparsely, flowers for twelve sixteen weeks and carries a scent of incense, pine and a note sharp that no other other line exactly has.
In its second sense “Haze” is whatever cross which contains a share of that family, which today is a great many of the sativa-leaning catalogue. A listing that reads “Haze” and gives no lineage may be mostly percent the classic family or a small fraction of it, and the flowering character tracks the fraction, not the name. The working question is never “is it a Haze” but “how much, and via which parent”.