Sativa seeds come with more vocabulary around them than any other kind of cannabis seed, and a good deal of it says a certain thing to a botanist, something else to a breeder and a third to the grower standing in front of the pack. The failed sativa grow nearly always traces back to a word that was understood in the wrong sense: a flowering time taken as a promise, a “sativa-dominant” tag read as a statement of effect, a landrace bought as if it were a modern hybrid. The entries below were put together with the range at https://hazesativaseeds.com to hand for reference, since it leans strongly to the classic end of the category and that is where the words carry the most weight most; the definitions themselves hold to any sativa seed from any seller. They are given in no special order, since none of them makes sense without the others.
Equatorial (the twelve-hour problem)
Describes lines out of regions in which daylength barely changes across the year, and where the plant never develop a strong response to changing days. These plants frequently start flowering reluctantly at a conventional twelve-hour schedule, since twelve hours is, to them, a mild unremarkable day rather than a signal.
The working response, handed around between sativa growers over decades, is to shorten the light further: eleven hours, occasionally ten, especially in the last weeks. It costs some little yield and gains an more decisive finish. A listing that uses “equatorial” is telling you about this in one word, and a grower who takes it as mere origin misses the point hidden in it.
Hermaphroditism in long-flowering lines
The appearance of male flowers on a female plant, typically late in flower and frequently in response to stress. Every cannabis population carries a degree of tendency for do; long-flowering plants show it more, for a plain reason: sixteen weeks of flower is fourteen weeks of exposure for a light leak, a heat spike or a missed watering that can set it off, and an plant that has already gone beyond its intended finish frequently throws a few late pollen flowers on its own in a last effort to make seed.
Not one of this means a sativa line unstable as a matter of nature; it makes the grower’s consistency matter over longer. Light-tight tents, steady conditions and cutting when the plant is ready rather than a weeks after take away most of the problem. A listing that mentions the breeder tests parents for intersex tendency is saying something more on a sativa than for any other category.
Terpinolene
A aromatic compound found in high amounts in a lot of old sativa strains and responsible for most of what growers describe as a “sativa” aroma: green, piney, lemon and faintly floral all at once. It is volatile, driven off quickly through fast drying, and it degrades more quickly in storage than the heavier terpenes that lead indica-leaning stock.
For a seed buyer the name does two things. When a listing lists terpinolene as the leading terpene, the strain probably carries substantial old-sativa genetics regardless of what the percentage claims. And when the grower wants that smell to survive to the jar, the cure has to be slow and slow; a fast drying room flattens a terpinolene line into something that tastes of very little and no trace of what the pack promised.
Foxtailing (and when it is not a fault)
The habit of some flowers to push out fresh bud clusters on top of existing ones, producing spired, irregular buds instead of round ones. In the majority of tent-bred strains it is a heat response, typically caused by light that is too close or a room that is too high, and the standard response is to correct the room.
In a good number of sativas, above all Southeast Asian and some Haze lines, it is built in and is going to happen under a flawless room. A first-time sativa grower frequently spends a month hunting a fault that is there, dropping lights and heat and delaying a slow plant even more. The breeder seldom says which kind you should expect; the lineage usually tells you.
Haze (the family, not the smell)
Originally a particular family of plants put together in coastal California from Colombian, Colombian and Thai landraces, and later kept and worked in the Netherlands. A true Haze grows tall, branches openly, takes for twelve to sixteen weeks and carries a scent of incense, pine and a note metallic that no other other line quite has.
In its second sense “Haze” is any cross which contains a share of that family, and today is a great many of the sativa-leaning market. A listing which says “Haze” and gives no parents could be mostly percent the old family or one small fraction 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 via which parent”.
Latitude (outdoor sativas)
The one number that determines whether a sativa can ripen outdoors, and one no pack prints. Long-flowering lines need a autumn days to continue late enough to let the plant ripen; at northern latitudes the frost arrives first, and the grower harvests an unripe plant in the end of October or else loses it to mould in November. The further to the equator, within the northern hemisphere, the later the window stretches, and Mediterranean and subtropical gardens can finish plants that temperate growers cannot.
The practical rule for a seed listing: an “outdoor” line finishing month is stated for the breeder’s own latitude, normally a point within temperate Europe or the west coast of the United States, and every step north of it pushes the finish back into the weather. A grower north of roughly the fiftieth parallel that wants a long-flowering sativa in the garden needs to be looking for a sativa autoflower or else a covered space, not a better season.
Flowering time (and what it is counted from)
The figure of weeks between the onset of flowering and maturity, and the single most misread number on a sativa pack. For photoperiod seed it is measured from the day the light is cut to twelve hours, not from sowing, so a “fourteen-week” sativa started after a eight-week vegetative stage is a twenty-two-week plant. Seed companies also quote the shorter end of the range, because the longer end sells fewer seed.
Sativa lines take everywhere from ten weeks to more than twenty, and the longest line in the Haze Sativa Seeds range is at around 16 weeks after the switch. The catalogue can be sorted by this number, which is the reasonable first step for a grower with a fixed timetable. A grower who adds four weeks to the figure the pack states is seldom caught out.
Sativa-dominant
The catalogue category rather than a botanical one. It usually means that more of a hybrid’s parents are classed as sativa by whoever drafted the description, which sometimes signals no more than a certain the flowers are airier or the aroma sharper than the that breeder’s indica-labelled lines.
The experience people associate with the word, clear-headed instead of heavy, is driven more by terpene profile and the THC balance than by the sativa fraction, and plenty of “sativa-dominant” hybrids produce a heavy couch result while a good number of indica-labelled lines do exactly the reverse. For a buyer the percentage is worth something for a rough hint to growth habit, flowering time and stretch; for a predictor to how it feels it is close to worthless unless accompanied by the terpene notes.
Stretch (the doubling)
The burst of vertical growth which follows the change to flowering. Indica-leaning plants add around half again; sativas commonly double, and some landrace types triple. The stretch continues two to five weeks and cannot be stopped after it begins, only redirected by training.
In practical terms, the stretch multiplier is the number worth reading before deciding when to switch. A sativa flipped at sixty centimetres in a standard tent is at the lamp before week four of flower; one switched at thirty centimetres centimetres has room. Growers coming from indica stock almost always flip too late the first time, and the lesson is written on the ceiling of the tent.
Landrace versus heirloom
A population of plants shaped over generations to a particular region by the local climate and growers alike, and not by modern breeding. Thai, Colombian, Congolese and Mexican lines are the classic sativa cases. A landrace is a spread, rather than a single plant: within a pack the flowering times, flowering times and smells range widely than any tent-bred hybrid, and this variation is the whole value of keeping one.
The trap is buying a landrace as a modern hybrid. It carries habits that make sense in an open field, such as a frame no tent can hold and a flowering rhythm set to an equatorial daylength the majority of growers never offer. “Heirloom” on a listing generally refers to a landrace that has been grown out somewhere for some generations, often with light selection for indoor life; it is nearer to usable but still far from uniform. A seller listing “landrace” that does not give an origin region and a reproduction history is using the word loosely, and the pack should be judged accordingly.