Sativa Seeds, Term by Term

Sativa seeds arrive with more jargon around them than any other kind of cannabis seed, and a good deal of it says a certain thing to a botanist, another to a breeder and a third to the grower trying to make a decision in front of the listing. A disappointing sativa grow nearly always traces back to a word that was understood in the wrong one of those senses: a flowering time read as a promise, a “sativa-dominant” tag read as a statement of effect, a landrace bought like it were a modern hybrid. The entries below were put together with the range at https://hazesativaseeds.com to hand as reference, since it runs heavily to the long-flowering end of the category where the vocabulary matter most; the definitions themselves apply to any sativa seed from any shop. They are in no special order, since not one of them makes sense on its own without the rest.

Equatorial (the twelve-hour problem)

Describes lines out of latitudes in which daylength hardly varies across the year, which means where the plant never develop a strong reaction to changing days. These lines frequently start flowering slowly at a conventional twelve-hour schedule, since twelve hours is, to them, a mild unremarkable day rather than a signal.

The practical fix, passed around between sativa growers over decades, is to shorten the light more: eleven hours, sometimes ten, especially in the last weeks. It costs a little yield and gains an more clearer finish. A listing that uses “equatorial” is telling you about this in one word, and a grower that reads it as mere geography has missed the point inside it.

Hermaphroditism in long-flowering lines

The production of pollen-bearing flowers on a female plant, typically towards the end in flower and frequently in response to stress. Every cannabis population has a degree of tendency for it; long-flowering lines show it more often, for one simple reason: sixteen weeks of flower is sixteen weeks of opportunity for a timer leak, a heat spike or a missed watering to set it going, and an old that has gone past its natural finish frequently produces a few desperate male flowers on its own as a final effort to set seed.

Not one of this makes a sativa line weak by nature; it means the grower’s consistency count over longer. A sealed room, stable temperatures and harvesting when the plant is done rather than a week later take away most of the risk. A listing that states the breeder tests parents for hermaphrodite traits is worth more for a sativa than for anything else.

Latitude (outdoor sativas)

The one figure that determines whether a sativa will finish outdoors, and one that no pack states. Long-flowering plants require the run of shortening days to continue long enough to let the plant finish; at high latitudes the frost comes first, and the grower cuts a unripe plant in the end of October or else loses it rot in November. A closer to the equator, in the northern hemisphere, the later the window stretches, and Mediterranean or subtropical gardens are able to ripen plants that temperate growers never will.

The usable rule of a seed listing: an “outdoor” sativa finishing month is stated for the breeder’s home latitude, normally a point within temperate Europe or the west coast of the United States, and every degree north of it pushes the finish later towards the weather. A grower north of roughly the fiftieth parallel who wants a true sativa outdoors is shopping for an autoflower or else a covered space, not a longer summer.

Terpinolene

A terpene found in high proportion in many classic sativa lines and accounting for most of what people describe as a “sativa” aroma: fresh, piney, citrus and slightly sweet at once. It is volatile, driven off quickly by fast drying, and terpinolene fades faster in storage than the earthier terpenes which lead most tent lines.

For a seed buyer the word does two jobs. Where a listing lists terpinolene as the leading terpene, the line probably carries real Haze-era ancestry regardless of what the label says. And where the you are after that profile to survive to the jar, the cure has to be cool and slow; a fast drying room turns a terpinolene sativa to a flower that smells of very little and no trace of what the pack promised.

Flowering time

The figure of weeks from the onset of flowering and maturity, which is the single most frequently misread figure on a sativa pack. With photoperiod seed it is counted from the day the light is cut to twelve hours, not from sowing, so a “fourteen-week” sativa started with a eight-week vegetative stage is a twenty-two-week plant. Breeders also quote the shorter end of the range, because the longer end moves fewer seed.

Long-flowering plants run everywhere from ten weeks to more than 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 a sensible first pass if you have a grower with a fixed schedule. A grower who allows four weeks to whatever the pack states is seldom caught out.

Stretch (the doubling)

The burst of upward growth which follows the switch to flowering. Indica-leaning plants add half again; sativas routinely double, and some landrace lines go further. The stretch continues three to four weeks and will not be halted once it begins, only redirected by training.

In tent terms, a stretch figure is the fact worth read before choosing when to switch. A sativa switched at sixty centimetres in a two-metre tent is at the lamp before week four of flower; one flipped at thirty centimetres has room. People coming over from indica stock nearly always flip 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 habit of certain flowers to grow new calyx clusters on top of old ones, producing spired, irregular buds rather than dense ones. In most tent-bred lines it is a heat symptom, typically caused by light too close or temperatures that is too high, and the advice is to fix the cause.

In a good number of sativas, especially Thai and some Haze lines, it is genetic and will happen under a perfect room. A first-time sativa grower often spends a month chasing a fault that was never a problem, dropping lights and heat only delaying a slow plant even more. The breeder rarely says which kind to expect; the parentage usually does.

Haze (the family, not the smell)

Originally a specific family of plants bred in coastal California from Colombian, Thai and South Indian landraces, and later kept and refined in the Netherlands. A true Haze grows tall, branches openly, flowers for twelve sixteen weeks and smells of spice, citrus and a note sharp that no line exactly has.

In its second sense “Haze” is whatever hybrid that carries some of that family, which by now is a great many of the sativa-leaning market. A listing which reads “Haze” and gives no lineage may be mostly percent original classic family or one sixteenth of it, and the flowering character follows the fraction, not the name. The useful question is not “is it a Haze” but “how much, and through which parent”.

Landrace versus heirloom

A population of plants shaped through generations to a particular place by local climate and growers together, and not by deliberate selection. Colombian, Thai, Malawian and Mexican lines are the classic sativa examples. A landrace is variable, rather than a one plant: inside a pack the flowering times, flowering times and aromas range widely than a tent-bred line, and that variation is the whole value of growing one.

The mistake is buying a landrace as a finished hybrid. It brings habits that make sense in an open field, such as a frame that no tent can contain and a flowering rhythm set to a daylength most growers never provide. “Heirloom” in a listing usually refers to a landrace that has been grown out somewhere for some generations, typically with light selection for tent life; it is nearer to usable but nonetheless not a hybrid. A shop listing “landrace” without a origin region and a reproduction count is applying the word as a flavour, and the pack should be judged accordingly.

Sativa-dominant

A marketing category and not a botanical one. It generally indicates that the larger share of a hybrid’s parents were described as sativa by whoever wrote the listing, and sometimes means no more than that the flowers are airier or the aroma sharper than the same breeder’s other releases.

The experience people connect with a word, clear-headed instead of sedating, is governed more by terpene profile and by cannabinoid balance than by ancestry, and a good number of “sativa-dominant” hybrids produce a flat couch effect and plenty of the opposite stock do exactly the opposite. For a buyer the percentage is useful as a rough guide to growth habit, flowering time and stretch; as a guide to effect it is close to useless without the aroma notes.