Sativa seeds come with more vocabulary around them than any other kind of cannabis seed, and most of it means one thing to a botanist, something else to a seed company and something different again to the person trying to make a decision in front of the listing. A disappointing sativa grow usually 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 description of effect, a landrace bought like it were a modern hybrid. The entries below are written with the range at https://hazesativaseeds.com open as the concrete examples, because it runs strongly to the classic end of the spectrum where the vocabulary matter most; the meanings though apply to any sativa seed from any seller. They are given in no particular order, since not one of them makes usable without the others.
Latitude (outdoor sativas)
The single number that determines whether a sativa can finish outdoors, and one no pack states. Equatorial lines require the autumn days to go on late enough for the plant ripen; at high latitudes the frost comes first, and the grower cuts a unripe plant in late October or else loses it rot in November. The closer south, in a northern hemisphere, the longer the season stretches, and coastal and low-latitude gardens are able to finish lines that temperate growers cannot.
The usable reading for a seed pack: an “outdoor” line harvest date is given for the breeder’s own latitude, usually somewhere within southern Europe or the west coast of the United States, and each degree further north of that moves the finish back towards the frost. A grower north of about the fiftieth parallel who is after a long-flowering sativa outdoors needs to be shopping for a sativa autoflower or a greenhouse, not a longer season.
Landrace versus heirloom
A population of plants adapted over centuries to one place by the local climate and climate together, and not by deliberate selection. Thai, Thai, Malawian and Oaxacan lines are the classic sativa examples. A landrace is variable, not a single plant: within a pack the heights, flowering times and smells spread widely than any tent-bred line, and this spread is the whole value of keeping one.
The mistake is buying a landrace like a modern product. It carries habits that made sense in an equatorial field, such as a frame no tent can contain and a flowering clock tuned to a equatorial daylength most growers never provide. “Heirloom” on a listing generally means a landrace that has been reproduced somewhere for some generations, often with light selection for indoor life; it is nearer to manageable but still not uniform. A shop offering “landrace” without an origin region and a generation history is using the word loosely, and the pack should be priced accordingly.
Terpinolene
A terpene found in high proportion in many old sativa lines and responsible for most of what people describe as a “sativa” aroma: green, piney, lemon and slightly floral all at once. It is fragile, lost quickly by fast drying, and terpinolene fades faster during the cure than the earthier terpenes that dominate most tent lines.
To a seed buyer the word does two things. When a listing names terpinolene as the leading aromas, the strain most likely carries substantial Haze-era genetics regardless of what the label says. And when the you are after that smell to survive to the jar, the cure is going to be cool and slow; a warm drying room flattens a terpinolene sativa to something that smells of hay and no trace of what the pack promised.
Foxtailing
The tendency of some flowers to grow new bud clusters on top of old ones, producing towered, irregular buds instead of round ones. In most tent-bred strains it is a heat symptom, typically from light that is too close or a room too high, and the advice is to fix the cause.
In a good number of sativas, especially Thai and some Haze hybrids, it is built in and will occur in a perfect room. A first-time sativa grower frequently wastes weeks hunting a problem that is a problem, lowering lights and temperatures only slowing a slow plant even more. The listing seldom warns which kind to expect; the parentage generally does.
Hermaphroditism in long-flowering lines
The production of pollen-bearing flowers on a female plant, usually towards the end in flower and often in response to stress. Almost every cannabis population has some tendency to do; sativa plants show it more often, and the reason is a plain reason: fourteen weeks of flower is sixteen weeks of opportunity for a timer leak, a heat spike or a late watering that can set it off, and an old that has waited past its intended end often produces a few desperate male sacs on its own as a last attempt to make seed.
Not one of these means a sativa strain weak as a matter of course; it makes the grower’s discipline count for longer. Light-tight room, steady conditions and cutting when the plant is done and not a weeks after remove the greater part of the problem. A listing which mentions a breeder tests parents for intersex traits is saying something more on a sativa than for anything other category.
Flowering time
The figure of weeks from the onset of flowering and maturity, which is the one most frequently misread figure on a sativa pack. With photoperiod seed it is measured from the day the light drops to twelve hours, rather than from germination, so a “fourteen-week” sativa grown with an ordinary vegetative period is a twenty-two-week plant. Breeders also give the shorter end of a range, since the longer 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 comes in at about 16 weeks after the flip. The catalogue can be sorted by that figure, which is a sensible first pass if you have a room with a fixed schedule. A grower who adds four weeks on top of the figure the pack states is seldom disappointed.
Equatorial (the twelve-hour problem)
Refers to lines from regions where daylength barely changes across the year, which means that the plant never evolved a sharp response to shortening days. These plants often flower slowly at a conventional twelve-hour schedule, because twelve hours is, for them, a mild unremarkable day rather than a signal.
The practical fix, handed down among sativa growers for decades, is to shorten the light more: eleven hours, occasionally ten, especially in the final weeks. It loses a little yield and buys an more decisive finish. A listing that uses “equatorial” is telling you this with one word, and a grower who reads it as a note on geography has missed the point inside it.
Stretch (the doubling)
The burst of vertical growth which follows the switch to flowering. Indica-leaning plants add half their height again; sativas routinely double, and a few landrace types go further. The stretch continues three to four weeks and will not be stopped after it has started, merely redirected by training.
In practical terms, a stretch multiplier is the fact worth read ahead of choosing when to switch. A sativa switched at sixty centimetres centimetres inside a standard tent is touching the lamp by week four of flower; one flipped at thirty centimetres centimetres has room. Growers moving over from indica strains almost always switch far too late the first time, and the consequence is written on the ceiling of the tent.
Haze (the family, not the smell)
In its first sense a specific line of plants put together in 1970s California from Mexican, Colombian and South Indian parents, and then kept and worked in the Netherlands. The Haze grows tall, branches openly, flowers for twelve to sixteen weeks and smells of incense, citrus and something sharp that no other line exactly has.
In its looser sense “Haze” is whatever cross which contains a share of that family, which by now is most of the sativa-leaning market. A listing which says “Haze” and gives no lineage could be mostly percent the old family or a small fraction of it, and the grow time follows the share, not the name. The useful question is never “is it a Haze” but “how much, and via which parent”.
Sativa-dominant (the label)
A catalogue term rather than a botanical one. The phrase generally means that more of a hybrid’s parents are described as sativa by the breeder who wrote the description, which sometimes signals nothing more than a certain the flowers are airier or the smell sharper than the same breeder’s other lines.
The effect people connect with the word, clear-headed instead of heavy, is governed far more by terpene chemistry and by THC balance than it is by the sativa fraction, and a good number of “sativa-dominant” releases deliver a flat sleepy effect and plenty of indica-labelled stock deliver the opposite. To a buyer the percentage is useful for a rough hint to growth habit, flowering time and stretch; for a predictor to effect it is next to worthless unless accompanied by the aroma description.
