Sativa seeds arrive with more jargon around them than any other category of cannabis seed, and a good deal of it means a certain thing to a botanist, something else to a seed company and something different again to the grower trying to make a decision in front of the pack. A disappointing sativa grow usually traces 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 description of effect, a landrace bought as if it were a modern hybrid. The entries below are written with the range at https://hazesativaseeds.com open as the concrete examples, because it leans strongly towards the classic end of the category and that is where the vocabulary matter most; the definitions themselves apply to any sativa seed from any seller. They are in no special order, since none of them is sense on its own without the rest.
Stretch
The burst of upward growth that follows the change to flowering. Most tent-bred plants add around half their height again; sativas commonly double, and some landrace types triple. The stretch continues three to five weeks and will not be halted after it has started, merely bent sideways by training.
In practical terms, a stretch figure is the fact worth reading ahead of deciding when to flip. A sativa switched at sixty centimetres inside a standard tent is touching the lamp by week four of flower; one switched at thirty centimetres has room. Growers coming from indica stock nearly always switch too late the first time, and the lesson is written on the ceiling of the tent.
Foxtailing (and when it is not a fault)
The tendency of some flowers to grow fresh calyx growth on top of old ones, producing towered, irregular buds instead of round ones. In the majority of indica-leaning lines it is a heat symptom, typically from light too close or a room that is too high, and the standard response is to fix the cause.
In many sativas, especially Thai and certain Haze lines, it is genetic and will occur under a perfect room. A new sativa grower often spends a month hunting a fault that was never there, lowering lights and heat and delaying a slow plant even more. The listing seldom says which kind to expect; the lineage usually tells you.
Intersex tendency
The production of pollen-bearing flowers on a female plant, typically towards the end in flower and frequently under stress. Almost every cannabis line has a degree of capacity for it; sativa lines show it more, for one simple one: sixteen weeks of flower is sixteen weeks of opportunity for a timer leak, a heat spike or a late watering to trigger it off, and an plant plant has already gone past its intended end often throws a few desperate male flowers on its own in a final attempt to make seed.
Not one of these makes a sativa line unstable by nature; it makes the grower’s discipline count for a longer stretch. A sealed room, steady conditions and cutting when the plant is ready rather than a weeks after take away the greater part of the risk. A listing that states a breeder tests parents for intersex tendency is saying something more on a sativa than for anything other category.
Latitude (outdoor sativas)
The one figure that decides if a sativa will ripen outdoors, and a number that no pack prints. Equatorial plants need a autumn days to go on long enough to let the plant ripen; at high latitudes the frost arrives first, and the grower cuts an unripe plant in the end of October or else watches it rot in November. The closer south, within the northern hemisphere, the later the season runs, and coastal or subtropical gardens can finish lines that northern gardens cannot.
The usable rule of a seed pack: an “outdoor” sativa harvest date is stated for the breeder’s home latitude, usually a point within temperate Europe or the west coast of the United States, and each step further north of it moves the finish later towards the weather. A grower above roughly the fiftieth parallel who wants a long-flowering sativa outdoors is looking for an autoflower or a covered space, not a longer summer.
Equatorial
Refers to lines from latitudes in which daylength hardly changes across the year, which means that the plant never develop a strong reaction to changing days. These lines frequently flower reluctantly under a conventional twelve-hour light cycle, because twelve hours is, for them, an ordinary day and not a signal.
The practical fix, handed around among sativa growers over decades, is to cut the light further: eleven hours, occasionally ten, particularly in the final weeks. It loses some little yield and gains an earlier clearer finish. A listing that says “equatorial” is warning you about this in one word, and a grower that reads it as a note on geography misses the instruction hidden in it.
Sativa-dominant
A marketing category rather than a botanical one. It generally means that the larger share of a hybrid’s lineage are described as sativa according to whoever wrote the description, and sometimes means nothing more than that the buds are airier or the smell sharper than the same breeder’s indica-labelled lines.
The effect people associate with the word, clear-headed rather than heavy, is driven far more by terpene profile and by THC content than it is by ancestry, and a good number of “sativa-dominant” hybrids produce a heavy sleepy effect and a good number of indica-labelled lines deliver exactly the opposite. For a grower the label is worth something as a rough hint to growth habit, flowering time and stretch; for a predictor to how it feels it is next to worthless without the aroma description.
Flowering time (and what it is counted from)
The figure of weeks between the start of flowering and maturity, and the one most frequently misunderstood figure on a sativa pack. With photoperiod seed it is counted from the day the light drops to twelve hours, not from germination, so a “fourteen-week” sativa grown after an eight-week vegetative period is a twenty-two-week plant. Seed companies also quote the shorter end of a spread, because the longer end moves less seed.
Long-flowering lines take anywhere from ten weeks to well over twenty, and the longest line in the Haze Sativa Seeds range is at about 16 weeks from the switch. The catalogue can be filtered by this number, which is a reasonable first step if you have a grower with a tight timetable. A grower who adds four weeks to the figure the pack says is seldom caught out.
Terpinolene
A terpene found in high proportion in many classic sativa lines and accounting for much of what growers mean as a “sativa” aroma: green, woody, citrus and faintly sweet at once. It is fragile, driven off easily by hot drying, and it fades faster during the cure than the earthier terpenes which dominate indica-leaning stock.
For a seed buyer the name does two jobs. Where a listing names terpinolene as the lead terpene, the strain most likely has real old-sativa ancestry regardless of what the label claims. And when the you are after that profile to still be there by the jar, the drying is going to be slow and cool; a warm drying room flattens a terpinolene sativa into a flower that smells of hay and leaves no trace of what the pack described.
Haze (the family, not the smell)
In its first sense a specific line of plants bred in coastal California from Colombian, Colombian and South Indian landraces, and then preserved and refined in the Netherlands. The Haze grows tall, fills out openly, flowers for twelve to to sixteen weeks and carries a scent of incense, pine and a note metallic that no other other line quite has.
In its looser sense “Haze” is any hybrid which carries a share of that family, and by now is most of the sativa-leaning market. A listing which says “Haze” without parents could be eighty percent original old family or one small fraction of it, and the flowering character tracks the fraction, not the name. The useful question is never “is it a Haze” but “how much, and via which parent”.